C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 250821
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
321 AM CDT Fri Jul 25 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
321 AM CDT Fri Jul 25 2025 /421 AM EDT Fri Jul 25 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph.
Elevated Flooding Risk.
DISCUSSION...
Thunderstorms southeast of Interstate 57 will shift east of the
area not long after daybreak.
Periodic thunderstorms this afternoon and again later tonight will bring
the chance for torrential rainfall and localized flooding,
particularly late tonight.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
Saturday...
Limited Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Sunday...
Elevated Excessive Heat Risk.
Monday...
Elevated Excessive Heat Risk.
Tuesday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Wednesday...
Limited Thunderstorm Risk.
DISCUSSION...
Lingering thunderstorms Saturday will bring the
chance for torrential rainfall and localized flooding,
particularly Saturday morning.
Heat and humidity may once again build to dangerous levels at
times Sunday through Tuesday.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed late today or tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the northeast at 20 to 25 mph.
https://wxn.io/463ht
Friday, July 25, 2025
Thursday, July 24, 2025
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 250221
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
921 PM CDT Thu Jul 24 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
921 PM CDT Thu Jul 24 2025 /1021 PM EDT Thu Jul 24 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph.
Elevated Flooding Risk.
DISCUSSION...
Isolated non-severe thunderstorms are possible this evening along
and south of a Peru to Waukegan, Illinois line. Primary threats
include a few lightning strikes and localized heavy downpours.
Additional storms are likely late tonight into Friday morning,
especially along and south of Interstate 80. Primary hazards
include gusty to locally damaging wind gusts along with heavy
rainfall which may lead localized flash flooding.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Saturday...
Limited Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
DISCUSSION...
Periodic thunderstorms Friday through Saturday will bring the
chance for torrential rainfall and localized flooding,
particularly late Friday night into Saturday morning.
Heat and humidity may once again build to dangerous levels at
times Sunday through Tuesday.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed late tonight, mainly south of I-80.
G...
https://wxn.io/g5j77
FLUS43 KLOT 250221
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
921 PM CDT Thu Jul 24 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
921 PM CDT Thu Jul 24 2025 /1021 PM EDT Thu Jul 24 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph.
Elevated Flooding Risk.
DISCUSSION...
Isolated non-severe thunderstorms are possible this evening along
and south of a Peru to Waukegan, Illinois line. Primary threats
include a few lightning strikes and localized heavy downpours.
Additional storms are likely late tonight into Friday morning,
especially along and south of Interstate 80. Primary hazards
include gusty to locally damaging wind gusts along with heavy
rainfall which may lead localized flash flooding.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Saturday...
Limited Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
DISCUSSION...
Periodic thunderstorms Friday through Saturday will bring the
chance for torrential rainfall and localized flooding,
particularly late Friday night into Saturday morning.
Heat and humidity may once again build to dangerous levels at
times Sunday through Tuesday.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed late tonight, mainly south of I-80.
G...
https://wxn.io/g5j77
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 242027
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
327 PM CDT Thu Jul 24 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
327 PM CDT Thu Jul 24 2025 /427 PM EDT Thu Jul 24 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Damaging Wind Risk...up to 70 mph.
Elevated Flooding Risk.
Elevated Excessive Heat Risk south of I-80.
DISCUSSION...
Hot and humid conditions are expected this afternoon with peak
heat indices of 100 to 110 degrees lingering south of I-80 ahead
of thunderstorms. Once storms pass, the heat threat will end.
Strong to severe thunderstorms will occur this afternoon into
the early evening, mainly near and south of I-80, including
northwest Indiana. The primary severe risk will be locally
damaging winds to 70 mph. Torrential rainfall may lead to isolated
instances of flooding.
Additional storms are possible this evening, and particularly late
tonight into Friday morning. Locally heavy rainfall may once again
lead to a threat for isolated flash flooding.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Saturday...
Limited Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
DISCUSSION...
Periodic thunderstorms Friday through Saturday will bring the
chance for torrential rainfall and loca...
https://wxn.io/oif7o
FLUS43 KLOT 242027
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
327 PM CDT Thu Jul 24 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
327 PM CDT Thu Jul 24 2025 /427 PM EDT Thu Jul 24 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Damaging Wind Risk...up to 70 mph.
Elevated Flooding Risk.
Elevated Excessive Heat Risk south of I-80.
DISCUSSION...
Hot and humid conditions are expected this afternoon with peak
heat indices of 100 to 110 degrees lingering south of I-80 ahead
of thunderstorms. Once storms pass, the heat threat will end.
Strong to severe thunderstorms will occur this afternoon into
the early evening, mainly near and south of I-80, including
northwest Indiana. The primary severe risk will be locally
damaging winds to 70 mph. Torrential rainfall may lead to isolated
instances of flooding.
Additional storms are possible this evening, and particularly late
tonight into Friday morning. Locally heavy rainfall may once again
lead to a threat for isolated flash flooding.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Saturday...
Limited Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
DISCUSSION...
Periodic thunderstorms Friday through Saturday will bring the
chance for torrential rainfall and loca...
https://wxn.io/oif7o
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 241702
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1202 PM CDT Thu Jul 24 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1202 PM CDT Thu Jul 24 2025 /102 PM EDT Thu Jul 24 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Damaging Wind Risk...up to 65 mph.
Elevated Flooding Risk.
Elevated Excessive Heat Risk this afternoon.
DISCUSSION...
Hot and humid conditions are expected this afternoon with peak
heat indices of 100 to 110 degrees. The heat and humidity could
help fuel strong to severe thunderstorms this afternoon into this
evening, mainly southeast of a Waukegan to Peru line, including
northwest Indiana. The primary severe risk will be locally
damaging winds to 65 mph.
In addition, storms through tonight will be capable of producing
torrential rainfall which could result in localized flash
flooding.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Saturday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Sunday...
Limited Excessive Heat Risk.
Monday...
Elevated Excessive Heat Risk.
Tuesday...
Limited Excessive Heat Risk.
DISCUSSION...
Periodic thunderstorms Friday through Saturday will bring the
chance for torrential rainfall and localized flooding.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed this afternoon and evening.
GENERAL STORM MOTION OF THE DAY:
Moving toward the ...
https://wxn.io/bz4br
FLUS43 KLOT 241702
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1202 PM CDT Thu Jul 24 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1202 PM CDT Thu Jul 24 2025 /102 PM EDT Thu Jul 24 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Damaging Wind Risk...up to 65 mph.
Elevated Flooding Risk.
Elevated Excessive Heat Risk this afternoon.
DISCUSSION...
Hot and humid conditions are expected this afternoon with peak
heat indices of 100 to 110 degrees. The heat and humidity could
help fuel strong to severe thunderstorms this afternoon into this
evening, mainly southeast of a Waukegan to Peru line, including
northwest Indiana. The primary severe risk will be locally
damaging winds to 65 mph.
In addition, storms through tonight will be capable of producing
torrential rainfall which could result in localized flash
flooding.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Saturday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Sunday...
Limited Excessive Heat Risk.
Monday...
Elevated Excessive Heat Risk.
Tuesday...
Limited Excessive Heat Risk.
DISCUSSION...
Periodic thunderstorms Friday through Saturday will bring the
chance for torrential rainfall and localized flooding.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed this afternoon and evening.
GENERAL STORM MOTION OF THE DAY:
Moving toward the ...
https://wxn.io/bz4br
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 240911
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
411 AM CDT Thu Jul 24 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
411 AM CDT Thu Jul 24 2025 /511 AM EDT Thu Jul 24 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Elevated Excessive Heat Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph.
Elevated Flooding Risk.
DISCUSSION...
Dangerous heat and humidity will continue across much of
northeastern IL and northwestern IN today, with peak afternoon
heat indices near 105 degrees.
Thunderstorms will redevelop across northern Illinois this
afternoon, then gradually sag south into this evening. The
strongest storms will be capable of producing locally damaging
wind gusts and torrential rainfall that could result in localized
flash flooding.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Saturday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Sunday...
Limited Excessive Heat Risk.
Monday...
Elevated Excessive Heat Risk.
Tuesday...
Limited Excessive Heat Risk.
DISCUSSION...
Periodic thunderstorms Friday through Saturday will bring the
chance for torrential rainfall and localized flooding.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed this afternoon.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east at 30 mph
https://wxn.io/davod
FLUS43 KLOT 240911
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
411 AM CDT Thu Jul 24 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
411 AM CDT Thu Jul 24 2025 /511 AM EDT Thu Jul 24 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Elevated Excessive Heat Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph.
Elevated Flooding Risk.
DISCUSSION...
Dangerous heat and humidity will continue across much of
northeastern IL and northwestern IN today, with peak afternoon
heat indices near 105 degrees.
Thunderstorms will redevelop across northern Illinois this
afternoon, then gradually sag south into this evening. The
strongest storms will be capable of producing locally damaging
wind gusts and torrential rainfall that could result in localized
flash flooding.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Saturday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Sunday...
Limited Excessive Heat Risk.
Monday...
Elevated Excessive Heat Risk.
Tuesday...
Limited Excessive Heat Risk.
DISCUSSION...
Periodic thunderstorms Friday through Saturday will bring the
chance for torrential rainfall and localized flooding.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed this afternoon.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east at 30 mph
https://wxn.io/davod
Wednesday, July 23, 2025
Heat Advisory Expiration for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
WWUS73 KLOT 240304
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
1004 PM CDT Wed Jul 23 2025
/O.EXP.KLOT.HT.Y.0002.000000T0000Z-250724T0300Z/
Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-
Including the cities of DeKalb, Algonquin, Rockford, Belvidere,
Rochelle, Oregon, Dixon, Crystal Lake, Woodstock, McHenry,
Sycamore, and Byron
1004 PM CDT Wed Jul 23 2025
...HEAT ADVISORY HAS EXPIRED...
Warm and humid conditions will continue overnight through Thursday
but are expected to remain below advisory criteria. Accordingly, the
Heat Advisory has been allowed to expire.
https://wxn.io/d2ya3
WWUS73 KLOT 240304
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
1004 PM CDT Wed Jul 23 2025
/O.EXP.KLOT.HT.Y.0002.000000T0000Z-250724T0300Z/
Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-
Including the cities of DeKalb, Algonquin, Rockford, Belvidere,
Rochelle, Oregon, Dixon, Crystal Lake, Woodstock, McHenry,
Sycamore, and Byron
1004 PM CDT Wed Jul 23 2025
...HEAT ADVISORY HAS EXPIRED...
Warm and humid conditions will continue overnight through Thursday
but are expected to remain below advisory criteria. Accordingly, the
Heat Advisory has been allowed to expire.
https://wxn.io/d2ya3
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 240102 AAA
HWOLOT
Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
802 PM CDT Wed Jul 23 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
802 PM CDT Wed Jul 23 2025 /902 PM EDT Wed Jul 23 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Excessive Heat Risk.
DISCUSSION...
Heat indices will remain above 75 degrees through the night for
much of the area, with heat indices only falling to around 85
degrees very late tonight in Chicago.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday...
Significant Excessive Heat Risk.
Elevated Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Friday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Saturday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Sunday through Tuesday...
Limited Excessive Heat Risk.
DISCUSSION...
Peak afternoon heat index values of 100 to 110 degrees are
expected again Thursday afternoon.
Thunderstorms may arrive as early as Thursday morning across
northwest Illinois, with increasing chances during the afternoon
and evening across the area. Any thunderstorms that occur will be
capable of gusty to locally damaging wind gusts as well as
torrential rainfall leading to localized flash flooding.
Periodic thunderstorms Friday through Saturday will bring the
chance for torrential rainfall and localized flooding.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/bq4rj
FLUS43 KLOT 240102 AAA
HWOLOT
Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
802 PM CDT Wed Jul 23 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
802 PM CDT Wed Jul 23 2025 /902 PM EDT Wed Jul 23 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Excessive Heat Risk.
DISCUSSION...
Heat indices will remain above 75 degrees through the night for
much of the area, with heat indices only falling to around 85
degrees very late tonight in Chicago.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday...
Significant Excessive Heat Risk.
Elevated Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Friday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Saturday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Sunday through Tuesday...
Limited Excessive Heat Risk.
DISCUSSION...
Peak afternoon heat index values of 100 to 110 degrees are
expected again Thursday afternoon.
Thunderstorms may arrive as early as Thursday morning across
northwest Illinois, with increasing chances during the afternoon
and evening across the area. Any thunderstorms that occur will be
capable of gusty to locally damaging wind gusts as well as
torrential rainfall leading to localized flash flooding.
Periodic thunderstorms Friday through Saturday will bring the
chance for torrential rainfall and localized flooding.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/bq4rj
Heat Advisory for McHenry Co., IL until 10:00 PM CDT 7/23
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
WWUS73 KLOT 232035
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
335 PM CDT Wed Jul 23 2025
/O.CON.KLOT.HT.Y.0002.000000T0000Z-250724T0300Z/
Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-
Including the cities of McHenry, Dixon, Oregon, Rockford, DeKalb,
Belvidere, Byron, Algonquin, Crystal Lake, Woodstock, Sycamore,
and Rochelle
335 PM CDT Wed Jul 23 2025
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING...
* WHAT...Heat index values of 105 to 110 occurring.
* WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, and McHenry Counties.
* WHEN...Until 10 PM CDT this evening.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
https://wxn.io/gi37h
WWUS73 KLOT 232035
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
335 PM CDT Wed Jul 23 2025
/O.CON.KLOT.HT.Y.0002.000000T0000Z-250724T0300Z/
Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-
Including the cities of McHenry, Dixon, Oregon, Rockford, DeKalb,
Belvidere, Byron, Algonquin, Crystal Lake, Woodstock, Sycamore,
and Rochelle
335 PM CDT Wed Jul 23 2025
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING...
* WHAT...Heat index values of 105 to 110 occurring.
* WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, and McHenry Counties.
* WHEN...Until 10 PM CDT this evening.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
https://wxn.io/gi37h
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 232027
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
327 PM CDT Wed Jul 23 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
327 PM CDT Wed Jul 23 2025 /427 PM EDT Wed Jul 23 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Significant Excessive Heat Risk through early evening.
Limited Thunderstorm Risk.
DISCUSSION...
A few isolated thunderstorms are expected this afternoon.
Heat index values will remain as high as 110 degrees
through the early part of this evening.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday...
Elevated Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Significant Excessive Heat Risk.
Friday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Saturday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Sunday through Tuesday...
Limited Excessive Heat Risk.
DISCUSSION...
Peak afternoon heat index values of 100 to 110 degrees are
expected again Thursday afternoon.
The chance of thunderstorms will increase late Thursday afternoon
near the Wisconsin border, with thunderstorm chances gradually
spreading south across the remainder of northern Illinois
Thursday evening. Any thunderstorms that do occur will be capable
of producing torrential rainfall and localized flash flooding
with a slight chance of locally damaging winds.
Periodic thunderstorms Friday through Saturday will bring the
chance for torrential rainfall and localized flooding.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonig...
https://wxn.io/rogg5
FLUS43 KLOT 232027
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
327 PM CDT Wed Jul 23 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
327 PM CDT Wed Jul 23 2025 /427 PM EDT Wed Jul 23 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Significant Excessive Heat Risk through early evening.
Limited Thunderstorm Risk.
DISCUSSION...
A few isolated thunderstorms are expected this afternoon.
Heat index values will remain as high as 110 degrees
through the early part of this evening.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday...
Elevated Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Significant Excessive Heat Risk.
Friday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Saturday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Sunday through Tuesday...
Limited Excessive Heat Risk.
DISCUSSION...
Peak afternoon heat index values of 100 to 110 degrees are
expected again Thursday afternoon.
The chance of thunderstorms will increase late Thursday afternoon
near the Wisconsin border, with thunderstorm chances gradually
spreading south across the remainder of northern Illinois
Thursday evening. Any thunderstorms that do occur will be capable
of producing torrential rainfall and localized flash flooding
with a slight chance of locally damaging winds.
Periodic thunderstorms Friday through Saturday will bring the
chance for torrential rainfall and localized flooding.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonig...
https://wxn.io/rogg5
Heat Advisory for McHenry Co., IL until 10:00 PM CDT 7/23
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
WWUS73 KLOT 231531
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
1031 AM CDT Wed Jul 23 2025
/O.CON.KLOT.HT.Y.0002.000000T0000Z-250724T0300Z/
Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-
Including the cities of Rockford, DeKalb, Woodstock, Sycamore,
Crystal Lake, McHenry, Byron, Algonquin, Oregon, Rochelle, Dixon,
and Belvidere
1031 AM CDT Wed Jul 23 2025
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING...
* WHAT...Peak afternoon heat index values of 105 to 108 expected.
* WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, and McHenry Counties.
* WHEN...Until 10 PM CDT this evening.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
https://wxn.io/nfqx1
WWUS73 KLOT 231531
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
1031 AM CDT Wed Jul 23 2025
/O.CON.KLOT.HT.Y.0002.000000T0000Z-250724T0300Z/
Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-
Including the cities of Rockford, DeKalb, Woodstock, Sycamore,
Crystal Lake, McHenry, Byron, Algonquin, Oregon, Rochelle, Dixon,
and Belvidere
1031 AM CDT Wed Jul 23 2025
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING...
* WHAT...Peak afternoon heat index values of 105 to 108 expected.
* WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, and McHenry Counties.
* WHEN...Until 10 PM CDT this evening.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
https://wxn.io/nfqx1
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 231323 AAA
HWOLOT
Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
823 AM CDT Wed Jul 23 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
823 AM CDT Wed Jul 23 2025 /923 AM EDT Wed Jul 23 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk.
Significant Excessive Heat Risk.
DISCUSSION...
A few isolated thunderstorms may develop this afternoon.
Peak afternoon heat index values of 100 to 110 degrees are
expected this afternoon.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Significant Excessive Heat Risk.
Friday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk.
Saturday...
Limited Flooding Risk.
Elevated Thunderstorm Risk.
Sunday and Monday...
Limited Excessive Heat Risk.
DISCUSSION...
Peak afternoon heat index values of 100 to 110 degrees are
expected again Thursday afternoon.
The chance of thunderstorms will increase late Thursday afternoon
near the Wisconsin border, with thunderstorm chances gradually
spreading south across the remainder of northern Illinois
Thursday evening. Any thunderstorms that do occur will be capable
of producing torrential rainfall and localized flash flooding
with a slight chance of locally damaging winds.
Periodic thunderstorms Friday through Saturday will bring the
chance for torrential rainfall and localized flooding.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENER...
https://wxn.io/m8jm5
FLUS43 KLOT 231323 AAA
HWOLOT
Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
823 AM CDT Wed Jul 23 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
823 AM CDT Wed Jul 23 2025 /923 AM EDT Wed Jul 23 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk.
Significant Excessive Heat Risk.
DISCUSSION...
A few isolated thunderstorms may develop this afternoon.
Peak afternoon heat index values of 100 to 110 degrees are
expected this afternoon.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Significant Excessive Heat Risk.
Friday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk.
Saturday...
Limited Flooding Risk.
Elevated Thunderstorm Risk.
Sunday and Monday...
Limited Excessive Heat Risk.
DISCUSSION...
Peak afternoon heat index values of 100 to 110 degrees are
expected again Thursday afternoon.
The chance of thunderstorms will increase late Thursday afternoon
near the Wisconsin border, with thunderstorm chances gradually
spreading south across the remainder of northern Illinois
Thursday evening. Any thunderstorms that do occur will be capable
of producing torrential rainfall and localized flash flooding
with a slight chance of locally damaging winds.
Periodic thunderstorms Friday through Saturday will bring the
chance for torrential rainfall and localized flooding.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENER...
https://wxn.io/m8jm5
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 230909
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
409 AM CDT Wed Jul 23 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
409 AM CDT Wed Jul 23 2025 /509 AM EDT Wed Jul 23 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Significant Excessive Heat Risk.
Limited Thunderstorm Risk.
DISCUSSION...
There is a 20 percent chance of isolated thunderstorms early this
morning over northwest Illinois. A few additional isolated
thunderstorms may develop across parts of northern Illinois this
afternoon.
Dangerous heat and humidity with peak afternoon heat index values
of 100 to 110 degrees are expected this afternoon.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday...
Significant Excessive Heat Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Elevated Flooding Risk.
Friday...
Elevated Thunderstorm Risk.
Elevated Flooding Risk.
Saturday...
Elevated Thunderstorm Risk.
Limited Flooding Risk.
Sunday through Monday...
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity with peak afternoon heat index values
of 100 to 110 degrees are expected again Thursday.
The chance of thunderstorms will increase late Thursday afternoon
near the Wisconsin border, with thunderstorm chances gradually
spreading south across the remainder of northern Illinois
Thursday evening. Any thunderstorms that do occur will be capable
of producing torrential rainfall and localized flash flooding
with a slight chance of locally damaging winds.
Periodic thunderstorms Fr...
https://wxn.io/oclp3
FLUS43 KLOT 230909
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
409 AM CDT Wed Jul 23 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
409 AM CDT Wed Jul 23 2025 /509 AM EDT Wed Jul 23 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Significant Excessive Heat Risk.
Limited Thunderstorm Risk.
DISCUSSION...
There is a 20 percent chance of isolated thunderstorms early this
morning over northwest Illinois. A few additional isolated
thunderstorms may develop across parts of northern Illinois this
afternoon.
Dangerous heat and humidity with peak afternoon heat index values
of 100 to 110 degrees are expected this afternoon.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday...
Significant Excessive Heat Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Elevated Flooding Risk.
Friday...
Elevated Thunderstorm Risk.
Elevated Flooding Risk.
Saturday...
Elevated Thunderstorm Risk.
Limited Flooding Risk.
Sunday through Monday...
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity with peak afternoon heat index values
of 100 to 110 degrees are expected again Thursday.
The chance of thunderstorms will increase late Thursday afternoon
near the Wisconsin border, with thunderstorm chances gradually
spreading south across the remainder of northern Illinois
Thursday evening. Any thunderstorms that do occur will be capable
of producing torrential rainfall and localized flash flooding
with a slight chance of locally damaging winds.
Periodic thunderstorms Fr...
https://wxn.io/oclp3
Heat Advisory for McHenry Co., IL until 10:00 PM CDT 7/23
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
WWUS73 KLOT 230846
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
346 AM CDT Wed Jul 23 2025
/O.CON.KLOT.HT.Y.0002.250723T1500Z-250724T0300Z/
Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-
Including the cities of Algonquin, Rockford, Belvidere, Sycamore,
Woodstock, Crystal Lake, McHenry, Dixon, Byron, DeKalb, Rochelle,
and Oregon
346 AM CDT Wed Jul 23 2025
...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 10 PM
CDT THIS EVENING...
* WHAT...Peak afternoon heat index values of 105 to 108 expected.
* WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, and McHenry Counties.
* WHEN...From 10 AM this morning to 10 PM CDT this evening.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
https://wxn.io/fkjzg
WWUS73 KLOT 230846
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
346 AM CDT Wed Jul 23 2025
/O.CON.KLOT.HT.Y.0002.250723T1500Z-250724T0300Z/
Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-
Including the cities of Algonquin, Rockford, Belvidere, Sycamore,
Woodstock, Crystal Lake, McHenry, Dixon, Byron, DeKalb, Rochelle,
and Oregon
346 AM CDT Wed Jul 23 2025
...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 10 PM
CDT THIS EVENING...
* WHAT...Peak afternoon heat index values of 105 to 108 expected.
* WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, and McHenry Counties.
* WHEN...From 10 AM this morning to 10 PM CDT this evening.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
https://wxn.io/fkjzg
Tuesday, July 22, 2025
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 230158
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
858 PM CDT Tue Jul 22 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
858 PM CDT Tue Jul 22 2025 /958 PM EDT Tue Jul 22 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk northwest Illinois.
DISCUSSION...
There is a slight chance of a thunderstorm toward sunrise over
northwest Illinois.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday...
Significant Excessive Heat Risk.
Limited Thunderstorm Risk.
Thursday...
Significant Excessive Heat Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Limited Flooding Risk.
Friday and Saturday...
Limited Thunderstorm and Flooding Risk.
Sunday and Monday...
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity with peak afternoon heat index values
of 100 to 110 degrees are expected Wednesday and Thursday.
There is a slight chance of a thunderstorm in the Rockford
vicinity early Wednesday morning.
The chance of thunderstorms will increase late Thursday afternoon
near the Wisconsin border, with thunderstorm chances gradually
spreading south across the remainder of northern Illinois Thursday
evening. Any thunderstorms that do occur will be capable of
producing torrential rainfall and localized flash flooding with a
slight chance of locally damaging winds.
While there will be many dry hours, there will be periodic
chances of thunderstorms Friday through Monday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be nece...
https://wxn.io/xh3b9
FLUS43 KLOT 230158
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
858 PM CDT Tue Jul 22 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
858 PM CDT Tue Jul 22 2025 /958 PM EDT Tue Jul 22 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk northwest Illinois.
DISCUSSION...
There is a slight chance of a thunderstorm toward sunrise over
northwest Illinois.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday...
Significant Excessive Heat Risk.
Limited Thunderstorm Risk.
Thursday...
Significant Excessive Heat Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Limited Flooding Risk.
Friday and Saturday...
Limited Thunderstorm and Flooding Risk.
Sunday and Monday...
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity with peak afternoon heat index values
of 100 to 110 degrees are expected Wednesday and Thursday.
There is a slight chance of a thunderstorm in the Rockford
vicinity early Wednesday morning.
The chance of thunderstorms will increase late Thursday afternoon
near the Wisconsin border, with thunderstorm chances gradually
spreading south across the remainder of northern Illinois Thursday
evening. Any thunderstorms that do occur will be capable of
producing torrential rainfall and localized flash flooding with a
slight chance of locally damaging winds.
While there will be many dry hours, there will be periodic
chances of thunderstorms Friday through Monday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be nece...
https://wxn.io/xh3b9
Heat Advisory for McHenry Co., IL until 10:00 PM CDT 7/23
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
WWUS73 KLOT 230153
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
853 PM CDT Tue Jul 22 2025
/O.CON.KLOT.HT.Y.0002.250723T1500Z-250724T0300Z/
Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-
Including the cities of Crystal Lake, Woodstock, Rochelle,
DeKalb, Oregon, Rockford, McHenry, Algonquin, Belvidere, Byron,
Sycamore, and Dixon
853 PM CDT Tue Jul 22 2025
...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 10 PM CDT
WEDNESDAY...
* WHAT...Peak afternoon heat index values of 100 to 108 expected.
* WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, and McHenry Counties.
* WHEN...From 10 AM to 10 PM CDT Wednesday.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
https://wxn.io/b5drp
WWUS73 KLOT 230153
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
853 PM CDT Tue Jul 22 2025
/O.CON.KLOT.HT.Y.0002.250723T1500Z-250724T0300Z/
Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-
Including the cities of Crystal Lake, Woodstock, Rochelle,
DeKalb, Oregon, Rockford, McHenry, Algonquin, Belvidere, Byron,
Sycamore, and Dixon
853 PM CDT Tue Jul 22 2025
...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 10 PM CDT
WEDNESDAY...
* WHAT...Peak afternoon heat index values of 100 to 108 expected.
* WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, and McHenry Counties.
* WHEN...From 10 AM to 10 PM CDT Wednesday.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
https://wxn.io/b5drp
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 222008
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
308 PM CDT Tue Jul 22 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
308 PM CDT Tue Jul 22 2025 /408 PM EDT Tue Jul 22 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk.
DISCUSSION...
There is a slight chance of a thunderstorm toward sunrise over
north central Illinois.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday...
Significant Excessive Heat Risk.
Limited Thunderstorm Risk.
Thursday...
Significant Excessive Heat Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Limited Flooding Risk.
Friday and Saturday...
Limited Thunderstorm and Flooding Risk.
Sunday and Monday...
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity with peak afternoon heat index values
of 100 to 110 degrees are expected Wednesday and Thursday.
There is a slight chance of a thunderstorm in the Rockford
vicinity early Wednesday morning.
The chance of thunderstorms will increase late Thursday afternoon
near the Wisconsin border, with thunderstorm chances gradually
spreading south across the remainder of northern Illinois Thursday
evening. Any thunderstorms that do occur will be capable of
producing torrential rainfall and localized flash flooding with a
slight chance of locally damaging winds.
While there will be many dry hours, there will be periodic
chances of thunderstorms Friday through Monday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonig...
https://wxn.io/7ro6r
FLUS43 KLOT 222008
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
308 PM CDT Tue Jul 22 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
308 PM CDT Tue Jul 22 2025 /408 PM EDT Tue Jul 22 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk.
DISCUSSION...
There is a slight chance of a thunderstorm toward sunrise over
north central Illinois.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday...
Significant Excessive Heat Risk.
Limited Thunderstorm Risk.
Thursday...
Significant Excessive Heat Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Limited Flooding Risk.
Friday and Saturday...
Limited Thunderstorm and Flooding Risk.
Sunday and Monday...
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity with peak afternoon heat index values
of 100 to 110 degrees are expected Wednesday and Thursday.
There is a slight chance of a thunderstorm in the Rockford
vicinity early Wednesday morning.
The chance of thunderstorms will increase late Thursday afternoon
near the Wisconsin border, with thunderstorm chances gradually
spreading south across the remainder of northern Illinois Thursday
evening. Any thunderstorms that do occur will be capable of
producing torrential rainfall and localized flash flooding with a
slight chance of locally damaging winds.
While there will be many dry hours, there will be periodic
chances of thunderstorms Friday through Monday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonig...
https://wxn.io/7ro6r
Heat Advisory for McHenry Co., IL until 10:00 PM CDT 7/23
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
WWUS73 KLOT 221909
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
209 PM CDT Tue Jul 22 2025
/O.UPG.KLOT.XH.A.0002.250723T1500Z-250725T0300Z/
/O.EXB.KLOT.HT.Y.0002.250723T1500Z-250724T0300Z/
Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-
Including the cities of Belvidere, McHenry, Rochelle, Dixon,
Sycamore, Rockford, Byron, DeKalb, Oregon, Algonquin, Crystal
Lake, and Woodstock
209 PM CDT Tue Jul 22 2025
...HEAT ADVISORY IN EFFECT FROM 10 AM TO 10 PM CDT WEDNESDAY...
* WHAT...Peak afternoon heat index values of 100 to 108 expected.
* WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, and McHenry Counties.
* WHEN...From 10 AM to 10 PM CDT Wednesday.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
https://wxn.io/4wrea
WWUS73 KLOT 221909
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
209 PM CDT Tue Jul 22 2025
/O.UPG.KLOT.XH.A.0002.250723T1500Z-250725T0300Z/
/O.EXB.KLOT.HT.Y.0002.250723T1500Z-250724T0300Z/
Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-
Including the cities of Belvidere, McHenry, Rochelle, Dixon,
Sycamore, Rockford, Byron, DeKalb, Oregon, Algonquin, Crystal
Lake, and Woodstock
209 PM CDT Tue Jul 22 2025
...HEAT ADVISORY IN EFFECT FROM 10 AM TO 10 PM CDT WEDNESDAY...
* WHAT...Peak afternoon heat index values of 100 to 108 expected.
* WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, and McHenry Counties.
* WHEN...From 10 AM to 10 PM CDT Wednesday.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
https://wxn.io/4wrea
Extreme Heat Watch for McHenry Co., IL until 10:00 PM CDT 7/24
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
WWUS73 KLOT 221355
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
855 AM CDT Tue Jul 22 2025
/O.CON.KLOT.XH.A.0002.250723T1500Z-250725T0300Z/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La
Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-Northern
Will-Southern Will-Eastern Will-
Including the cities of Morris, Wilmington, Paxton, Pontiac,
Yorkville, Dwight, Sycamore, Dixon, Bourbonnais, Manhattan,
Plainfield, Crystal Lake, Beecher, La Salle, Rockford, DeKalb,
McHenry, Bolingbrook, Belvidere, Wheaton, Waukegan, Kankakee,
Oswego, Joliet, Mokena, Buffalo Grove, Fairbury, Minooka,
Mendota, Oregon, Gibson City, Mundelein, Carol Stream, Peotone,
Ottawa, Downers Grove, Byron, Coal City, Bradley, Gilman,
Lombard, Gurnee, Rochelle, Streator, Elgin, Plano, Woodstock,
Aurora, Naperville, Watseka, Marseilles, Channahon, Crete, and
Algonquin
855 AM CDT Tue Jul 22 2025
...EXTREME HEAT WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH THURSDAY EVENING...
* WHAT...Dangerously hot conditions with heat index values of 105 to
115 possible.
* WHERE...Portions of central, east central, north central, and
northeast Illinois.
* WHEN...From Wednesday morning through Thursday evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
https://wxn.io/xxy85
WWUS73 KLOT 221355
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
855 AM CDT Tue Jul 22 2025
/O.CON.KLOT.XH.A.0002.250723T1500Z-250725T0300Z/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La
Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-Northern
Will-Southern Will-Eastern Will-
Including the cities of Morris, Wilmington, Paxton, Pontiac,
Yorkville, Dwight, Sycamore, Dixon, Bourbonnais, Manhattan,
Plainfield, Crystal Lake, Beecher, La Salle, Rockford, DeKalb,
McHenry, Bolingbrook, Belvidere, Wheaton, Waukegan, Kankakee,
Oswego, Joliet, Mokena, Buffalo Grove, Fairbury, Minooka,
Mendota, Oregon, Gibson City, Mundelein, Carol Stream, Peotone,
Ottawa, Downers Grove, Byron, Coal City, Bradley, Gilman,
Lombard, Gurnee, Rochelle, Streator, Elgin, Plano, Woodstock,
Aurora, Naperville, Watseka, Marseilles, Channahon, Crete, and
Algonquin
855 AM CDT Tue Jul 22 2025
...EXTREME HEAT WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH THURSDAY EVENING...
* WHAT...Dangerously hot conditions with heat index values of 105 to
115 possible.
* WHERE...Portions of central, east central, north central, and
northeast Illinois.
* WHEN...From Wednesday morning through Thursday evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
https://wxn.io/xxy85
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 220837
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
337 AM CDT Tue Jul 22 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
337 AM CDT Tue Jul 22 2025 /437 AM EDT Tue Jul 22 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
No hazardous weather is expected at this time.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday and Thursday...
Significant Excessive Heat Risk.
Thursday Night...
Limited Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Friday...
Elevated Thunderstorm Risk.
Limited Flooding Risk.
Saturday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Sunday and Monday...
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity with heat index values up to around
110F are expected Wednesday and Thursday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/i9kh2
FLUS43 KLOT 220837
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
337 AM CDT Tue Jul 22 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
337 AM CDT Tue Jul 22 2025 /437 AM EDT Tue Jul 22 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
No hazardous weather is expected at this time.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday and Thursday...
Significant Excessive Heat Risk.
Thursday Night...
Limited Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Friday...
Elevated Thunderstorm Risk.
Limited Flooding Risk.
Saturday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Sunday and Monday...
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity with heat index values up to around
110F are expected Wednesday and Thursday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/i9kh2
Extreme Heat Watch for McHenry Co., IL until 10:00 PM CDT 7/24
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
WWUS73 KLOT 220821
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
321 AM CDT Tue Jul 22 2025
/O.CON.KLOT.XH.A.0002.250723T1500Z-250725T0300Z/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La
Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-Northern
Will-Southern Will-Eastern Will-
Including the cities of Woodstock, Dwight, Peotone, Bourbonnais,
Paxton, Naperville, Wheaton, Mundelein, Kankakee, Algonquin,
Sycamore, Aurora, Crete, Oregon, Rochelle, Carol Stream, Dixon,
Mendota, Belvidere, Minooka, Elgin, Watseka, Gibson City, Joliet,
Marseilles, Oswego, Bolingbrook, McHenry, DeKalb, Downers Grove,
Mokena, Plainfield, Ottawa, Coal City, Pontiac, Channahon,
Manhattan, La Salle, Bradley, Waukegan, Gurnee, Byron, Crystal
Lake, Lombard, Streator, Gilman, Buffalo Grove, Wilmington,
Yorkville, Beecher, Fairbury, Rockford, Plano, and Morris
321 AM CDT Tue Jul 22 2025
...EXTREME HEAT WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH THURSDAY EVENING...
* WHAT...Dangerously hot conditions with heat index values of 105 to
115 possible.
* WHERE...Portions of central, east central, north central, and
northeast Illinois.
* WHEN...From Wednesday morning through Thursday evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
https://wxn.io/qw6ud
WWUS73 KLOT 220821
NPWLOT
URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
321 AM CDT Tue Jul 22 2025
/O.CON.KLOT.XH.A.0002.250723T1500Z-250725T0300Z/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La
Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-Northern
Will-Southern Will-Eastern Will-
Including the cities of Woodstock, Dwight, Peotone, Bourbonnais,
Paxton, Naperville, Wheaton, Mundelein, Kankakee, Algonquin,
Sycamore, Aurora, Crete, Oregon, Rochelle, Carol Stream, Dixon,
Mendota, Belvidere, Minooka, Elgin, Watseka, Gibson City, Joliet,
Marseilles, Oswego, Bolingbrook, McHenry, DeKalb, Downers Grove,
Mokena, Plainfield, Ottawa, Coal City, Pontiac, Channahon,
Manhattan, La Salle, Bradley, Waukegan, Gurnee, Byron, Crystal
Lake, Lombard, Streator, Gilman, Buffalo Grove, Wilmington,
Yorkville, Beecher, Fairbury, Rockford, Plano, and Morris
321 AM CDT Tue Jul 22 2025
...EXTREME HEAT WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH THURSDAY EVENING...
* WHAT...Dangerously hot conditions with heat index values of 105 to
115 possible.
* WHERE...Portions of central, east central, north central, and
northeast Illinois.
* WHEN...From Wednesday morning through Thursday evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
https://wxn.io/qw6ud
Monday, July 21, 2025
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 212018
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
318 PM CDT Mon Jul 21 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
318 PM CDT Mon Jul 21 2025 /418 PM EDT Mon Jul 21 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
No hazardous weather is expected at this time.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Wednesday and Thursday...
Significant Excessive Heat Risk.
Thursday night...
Limited Thunderstorm Risk.
Friday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Saturday...
Limited Thunderstorm Risk.
Sunday...
Limited Excessive Heat Risk.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/j4p8a
FLUS43 KLOT 212018
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
318 PM CDT Mon Jul 21 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
318 PM CDT Mon Jul 21 2025 /418 PM EDT Mon Jul 21 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
No hazardous weather is expected at this time.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Wednesday and Thursday...
Significant Excessive Heat Risk.
Thursday night...
Limited Thunderstorm Risk.
Friday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Saturday...
Limited Thunderstorm Risk.
Sunday...
Limited Excessive Heat Risk.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/j4p8a
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 211522
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1022 AM CDT Mon Jul 21 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1022 AM CDT Mon Jul 21 2025 /1122 AM EDT Mon Jul 21 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
No hazardous weather is expected at this time.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Wednesday and Thursday...
Significant Excessive Heat Risk.
Thursday night...
Limited Thunderstorm Risk.
Friday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Saturday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity with heat index values up to around
110F are expected Wednesday and Thursday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/q15sw
FLUS43 KLOT 211522
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1022 AM CDT Mon Jul 21 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1022 AM CDT Mon Jul 21 2025 /1122 AM EDT Mon Jul 21 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
No hazardous weather is expected at this time.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Wednesday and Thursday...
Significant Excessive Heat Risk.
Thursday night...
Limited Thunderstorm Risk.
Friday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Saturday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity with heat index values up to around
110F are expected Wednesday and Thursday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/q15sw
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 210849
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
349 AM CDT Mon Jul 21 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
349 AM CDT Mon Jul 21 2025 /449 AM EDT Mon Jul 21 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
High Swim Risk Lake Michigan Beaches Illinois shore this morning.
DISCUSSION...
Dangerous swimming conditions continue for the Illinois beaches of
Lake Michigan this morning.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Wednesday and Thursday...
Significant Excessive Heat Risk.
Thursday night...
Limited Thunderstorm Risk.
Friday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Saturday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity with heat index values up to around
110F are expected Wednesday and Thursday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/aufjf
FLUS43 KLOT 210849
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
349 AM CDT Mon Jul 21 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
349 AM CDT Mon Jul 21 2025 /449 AM EDT Mon Jul 21 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
High Swim Risk Lake Michigan Beaches Illinois shore this morning.
DISCUSSION...
Dangerous swimming conditions continue for the Illinois beaches of
Lake Michigan this morning.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Wednesday and Thursday...
Significant Excessive Heat Risk.
Thursday night...
Limited Thunderstorm Risk.
Friday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Saturday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity with heat index values up to around
110F are expected Wednesday and Thursday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/aufjf
Sunday, July 20, 2025
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 210124 AAA
HWOLOT
Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
824 PM CDT Sun Jul 20 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
824 PM CDT Sun Jul 20 2025 /924 PM EDT Sun Jul 20 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk south of US Route 24.
High Swim Risk Lake Michigan Beaches.
DISCUSSION...
Isolated showers and thunderstorms are possible overnight,
mainly south of US Route 24. No severe weather is expected.
Dangerous swimming conditions continue for the Illinois and
Indiana beaches of Lake Michigan through tonight.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Monday...
Limited Thunderstorm Risk south of I-80.
High Swim Risk Lake Michigan Beaches in the morning.
Wednesday...
Significant Excessive Heat Risk.
Thursday Night...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Friday and Saturday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity is expected Wednesday and Thursday,
and possibly stretching into Friday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-southeast at around 20 mph.
https://wxn.io/xtoej
FLUS43 KLOT 210124 AAA
HWOLOT
Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
824 PM CDT Sun Jul 20 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
824 PM CDT Sun Jul 20 2025 /924 PM EDT Sun Jul 20 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk south of US Route 24.
High Swim Risk Lake Michigan Beaches.
DISCUSSION...
Isolated showers and thunderstorms are possible overnight,
mainly south of US Route 24. No severe weather is expected.
Dangerous swimming conditions continue for the Illinois and
Indiana beaches of Lake Michigan through tonight.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Monday...
Limited Thunderstorm Risk south of I-80.
High Swim Risk Lake Michigan Beaches in the morning.
Wednesday...
Significant Excessive Heat Risk.
Thursday Night...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Friday and Saturday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity is expected Wednesday and Thursday,
and possibly stretching into Friday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-southeast at around 20 mph.
https://wxn.io/xtoej
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 202022
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
322 PM CDT Sun Jul 20 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
322 PM CDT Sun Jul 20 2025 /422 PM EDT Sun Jul 20 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph south of
US Route 24.
Elevated Flooding Risk south of US Route 24.
High Swim Risk Lake Michigan Beaches.
DISCUSSION...
There is a chance for thunderstorms this afternoon through this
evening, mainly south of a Pontiac to Rensselaer line. The main
threat from these storms will be damaging winds and very heavy
rain.
Dangerous swimming conditions continue for the Illinois and
Indiana beaches of Lake Michigan through tonight.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Monday...
Limited Thunderstorm Risk south of I-80.
High Swim Risk Lake Michigan Beaches in the morning.
Wednesday...
Significant Excessive Heat Risk.
Thursday Night...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Friday and Saturday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity is expected Wednesday and Thursday,
and possibly stretching into Friday.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed late this afternoon and evening toward
central IL.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-southeast at 40 mph.
https://wxn.io/50ex5
FLUS43 KLOT 202022
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
322 PM CDT Sun Jul 20 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
322 PM CDT Sun Jul 20 2025 /422 PM EDT Sun Jul 20 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph south of
US Route 24.
Elevated Flooding Risk south of US Route 24.
High Swim Risk Lake Michigan Beaches.
DISCUSSION...
There is a chance for thunderstorms this afternoon through this
evening, mainly south of a Pontiac to Rensselaer line. The main
threat from these storms will be damaging winds and very heavy
rain.
Dangerous swimming conditions continue for the Illinois and
Indiana beaches of Lake Michigan through tonight.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Monday...
Limited Thunderstorm Risk south of I-80.
High Swim Risk Lake Michigan Beaches in the morning.
Wednesday...
Significant Excessive Heat Risk.
Thursday Night...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Friday and Saturday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Dangerous heat and humidity is expected Wednesday and Thursday,
and possibly stretching into Friday.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed late this afternoon and evening toward
central IL.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-southeast at 40 mph.
https://wxn.io/50ex5
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 201715
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1215 PM CDT Sun Jul 20 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1215 PM CDT Sun Jul 20 2025 /115 PM EDT Sun Jul 20 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph.
Elevated Flooding Risk.
High Swim Risk Lake Michigan Beaches In Illinois.
DISCUSSION...
There is a chance for thunderstorms this afternoon into this
evening, mainly south of a Pontiac to Rensselaer line. The main
threat from these storms will be damaging winds and very heavy
rain.
Another round of thunderstorms with an axis of torrential
rainfall and potential flooding across central Illinois could
reach as far north as a Pontiac to Fowler line tonight.
Dangerous swimming conditions continue for the Illinois beaches
of Lake Michigan through tonight.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Monday...
Limited Thunderstorm Risk.
Wednesday and Thursday...
Elevated Excessive Heat Risk.
Thursday Night...
Limited Thunderstorm Risk.
Friday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Saturday...
Limited Thunderstorm Risk.
DISCUSSION...
Dangerous heat and humidity is expected Wednesday and Thursday.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed late this afternoon toward central
Illinois.
GENERAL STORM MOTION OF THE DAY:
Moving toward the southeast at 40 mph.
https://wxn.io/y6zyi
FLUS43 KLOT 201715
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1215 PM CDT Sun Jul 20 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1215 PM CDT Sun Jul 20 2025 /115 PM EDT Sun Jul 20 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph.
Elevated Flooding Risk.
High Swim Risk Lake Michigan Beaches In Illinois.
DISCUSSION...
There is a chance for thunderstorms this afternoon into this
evening, mainly south of a Pontiac to Rensselaer line. The main
threat from these storms will be damaging winds and very heavy
rain.
Another round of thunderstorms with an axis of torrential
rainfall and potential flooding across central Illinois could
reach as far north as a Pontiac to Fowler line tonight.
Dangerous swimming conditions continue for the Illinois beaches
of Lake Michigan through tonight.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Monday...
Limited Thunderstorm Risk.
Wednesday and Thursday...
Elevated Excessive Heat Risk.
Thursday Night...
Limited Thunderstorm Risk.
Friday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Saturday...
Limited Thunderstorm Risk.
DISCUSSION...
Dangerous heat and humidity is expected Wednesday and Thursday.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed late this afternoon toward central
Illinois.
GENERAL STORM MOTION OF THE DAY:
Moving toward the southeast at 40 mph.
https://wxn.io/y6zyi
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 200930
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
430 AM CDT Sun Jul 20 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
430 AM CDT Sun Jul 20 2025 /530 AM EDT Sun Jul 20 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk areawide...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph toward
central Illinois.
Elevated Flooding Risk south of I-80 tonight.
High Swim Risk Lake Michigan Beaches in Illinois.
DISCUSSION...
Showers and thunderstorms are expected to cross the area this
morning, with additional thunderstorms capable of producing
damaging winds toward central Illinois late this afternoon and
early evening.
Another round of thunderstorms with an axis of torrential
rainfall and potential flooding across central Illinois could
reach as far north of a Pontiac to Fowler line tonight.
Dangerous swimming conditions continue for the Illinois beaches
of Lake Michigan through tonight.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Monday...
Limited Thunderstorm Risk.
Wednesday and Thursday...
Elevated Excessive Heat Risk.
Thursday night...
Limited Thunderstorm Risk.
Friday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Saturday...
Limited Thunderstorm Risk.
DISCUSSION...
Dangerous heat and humidity is expected Wednesday and Thursday.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed late this afternoon toward central
Illinois.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east at 40 mph.
https://wxn.io/mmsi9
FLUS43 KLOT 200930
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
430 AM CDT Sun Jul 20 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
430 AM CDT Sun Jul 20 2025 /530 AM EDT Sun Jul 20 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk areawide...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph toward
central Illinois.
Elevated Flooding Risk south of I-80 tonight.
High Swim Risk Lake Michigan Beaches in Illinois.
DISCUSSION...
Showers and thunderstorms are expected to cross the area this
morning, with additional thunderstorms capable of producing
damaging winds toward central Illinois late this afternoon and
early evening.
Another round of thunderstorms with an axis of torrential
rainfall and potential flooding across central Illinois could
reach as far north of a Pontiac to Fowler line tonight.
Dangerous swimming conditions continue for the Illinois beaches
of Lake Michigan through tonight.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Monday...
Limited Thunderstorm Risk.
Wednesday and Thursday...
Elevated Excessive Heat Risk.
Thursday night...
Limited Thunderstorm Risk.
Friday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Saturday...
Limited Thunderstorm Risk.
DISCUSSION...
Dangerous heat and humidity is expected Wednesday and Thursday.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed late this afternoon toward central
Illinois.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east at 40 mph.
https://wxn.io/mmsi9
Saturday, July 19, 2025
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 192244
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
544 PM CDT Sat Jul 19 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
544 PM CDT Sat Jul 19 2025 /644 PM EDT Sat Jul 19 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk...with an associated:
Level 2 of 5 Damaging Wind Risk...up to 60 mph.
Level 1 of 5 Large Hail Risk...up to quarter size.
Elevated Flooding Risk.
DISCUSSION...
Scattered thunderstorms and locally heavy rain are possible late
tonight, mainly south of I-80. A few storms could be strong to
severe.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Sunday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Monday...
Limited Thunderstorm Risk.
Wednesday...
Elevated Excessive Heat Risk.
Thursday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Friday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Thunderstorms with torrential rain and localized flash flooding
may persist south of I-80 on Sunday.
Building waves on Lake Michigan late tonight through Sunday will
result in dangerous swimming conditions at northeast IL beaches.
Dangerous heat and humidity are possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotters activation is not expected at this time.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-southeast at 40 mph.
https://wxn.io/c8dws
FLUS43 KLOT 192244
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
544 PM CDT Sat Jul 19 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
544 PM CDT Sat Jul 19 2025 /644 PM EDT Sat Jul 19 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk...with an associated:
Level 2 of 5 Damaging Wind Risk...up to 60 mph.
Level 1 of 5 Large Hail Risk...up to quarter size.
Elevated Flooding Risk.
DISCUSSION...
Scattered thunderstorms and locally heavy rain are possible late
tonight, mainly south of I-80. A few storms could be strong to
severe.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Sunday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Monday...
Limited Thunderstorm Risk.
Wednesday...
Elevated Excessive Heat Risk.
Thursday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Friday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Thunderstorms with torrential rain and localized flash flooding
may persist south of I-80 on Sunday.
Building waves on Lake Michigan late tonight through Sunday will
result in dangerous swimming conditions at northeast IL beaches.
Dangerous heat and humidity are possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotters activation is not expected at this time.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-southeast at 40 mph.
https://wxn.io/c8dws
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 192000
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
Issued by National Weather Service Lincoln IL
300 PM CDT Sat Jul 19 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
300 PM CDT Sat Jul 19 2025 /400 PM EDT Sat Jul 19 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Tornado Risk.
Level 2 of 5 Damaging Wind Risk...up to 60 mph.
Level 1 of 5 Large Hail Risk...up to quarter size.
Elevated Flooding Risk.
DISCUSSION...
Scattered thunderstorms and locally heavy rain are possible late
tonight, mainly south of I-80. Severe potential is generally low.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Sunday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Monday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Tuesday...
Limited Flooding Risk.
Wednesday...
Elevated Excessive Heat Risk.
Thursday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Friday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Thunderstorms with torrential rain and localized flash flooding
may persist south of I-80 on Sunday.
Dangerous heat and humidity are possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed after midnight tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-southeast at 40 mph.
https://wxn.io/fa48r
FLUS43 KLOT 192000
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
Issued by National Weather Service Lincoln IL
300 PM CDT Sat Jul 19 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
300 PM CDT Sat Jul 19 2025 /400 PM EDT Sat Jul 19 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Tornado Risk.
Level 2 of 5 Damaging Wind Risk...up to 60 mph.
Level 1 of 5 Large Hail Risk...up to quarter size.
Elevated Flooding Risk.
DISCUSSION...
Scattered thunderstorms and locally heavy rain are possible late
tonight, mainly south of I-80. Severe potential is generally low.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Sunday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Monday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Tuesday...
Limited Flooding Risk.
Wednesday...
Elevated Excessive Heat Risk.
Thursday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Friday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Thunderstorms with torrential rain and localized flash flooding
may persist south of I-80 on Sunday.
Dangerous heat and humidity are possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed after midnight tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-southeast at 40 mph.
https://wxn.io/fa48r
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 191636
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
Issued by National Weather Service Lincoln IL
1136 AM CDT Sat Jul 19 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1136 AM CDT Sat Jul 19 2025 /1236 PM EDT Sat Jul 19 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Tornado Risk.
Level 2 of 5 Damaging Wind Risk...up to 60 mph.
Level 1 of 5 Large Hail Risk...up to quarter size.
Elevated Flooding Risk.
DISCUSSION...
Thunderstorms with the potential to produce damaging winds and
torrential rainfall are expected across the area through
early-afternoon. Additional scattered thunderstorms and
locally heavy rain are possible late tonight, mainly south of
I-80.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Sunday...
Elevated Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Monday...
Limited Thunderstorm Risk.
Tuesday...
Limited Excessive Heat Risk.
Wednesday...
Elevated Excessive Heat Risk.
Thursday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Friday...
Limited Thunderstorm Risk.
DISCUSSION...
Thunderstorms with torrential rain and localized flash flooding
may persist south of I-80 on Sunday.
Dangerous heat and humidity are possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed through mid-afternoon.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-southeast at 40 mp...
https://wxn.io/xly5i
FLUS43 KLOT 191636
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
Issued by National Weather Service Lincoln IL
1136 AM CDT Sat Jul 19 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1136 AM CDT Sat Jul 19 2025 /1236 PM EDT Sat Jul 19 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Tornado Risk.
Level 2 of 5 Damaging Wind Risk...up to 60 mph.
Level 1 of 5 Large Hail Risk...up to quarter size.
Elevated Flooding Risk.
DISCUSSION...
Thunderstorms with the potential to produce damaging winds and
torrential rainfall are expected across the area through
early-afternoon. Additional scattered thunderstorms and
locally heavy rain are possible late tonight, mainly south of
I-80.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Sunday...
Elevated Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Monday...
Limited Thunderstorm Risk.
Tuesday...
Limited Excessive Heat Risk.
Wednesday...
Elevated Excessive Heat Risk.
Thursday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Friday...
Limited Thunderstorm Risk.
DISCUSSION...
Thunderstorms with torrential rain and localized flash flooding
may persist south of I-80 on Sunday.
Dangerous heat and humidity are possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed through mid-afternoon.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-southeast at 40 mp...
https://wxn.io/xly5i
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 190922
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
422 AM CDT Sat Jul 19 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
422 AM CDT Sat Jul 19 2025 /522 AM EDT Sat Jul 19 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Damaging Wind Risk...up to 60 mph.
Level 1 of 5 Large Hail Risk...up to quarter size.
Elevated Flooding Risk.
DISCUSSION...
Thunderstorms with the potential to produce damaging winds and
torrential rainfall are expected to cross the area late this
morning through mid-afternoon. Additional scattered thunderstorms
and locally heavy rain are possible late tonight, mainly south of
I-80.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Sunday...
Elevated Flooding Risk well south of I-80.
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Monday...
Limited Thunderstorm Risk well south of I-80.
Tuesday...
Limited Excessive Heat Risk.
Wednesday and Thursday...
Elevated Excessive Heat Risk.
Thursday night through Friday...
Limited Thunderstorm Risk.
DISCUSSION...
Thunderstorms with torrential rain and localized flash flooding
may persist south of I-80 on Sunday.
Dangerous heat and humidity are possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed late this morning and afternoon.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-southeast at 40 mph.
https://wxn.io/p29xj
FLUS43 KLOT 190922
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
422 AM CDT Sat Jul 19 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
422 AM CDT Sat Jul 19 2025 /522 AM EDT Sat Jul 19 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Damaging Wind Risk...up to 60 mph.
Level 1 of 5 Large Hail Risk...up to quarter size.
Elevated Flooding Risk.
DISCUSSION...
Thunderstorms with the potential to produce damaging winds and
torrential rainfall are expected to cross the area late this
morning through mid-afternoon. Additional scattered thunderstorms
and locally heavy rain are possible late tonight, mainly south of
I-80.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Sunday...
Elevated Flooding Risk well south of I-80.
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Monday...
Limited Thunderstorm Risk well south of I-80.
Tuesday...
Limited Excessive Heat Risk.
Wednesday and Thursday...
Elevated Excessive Heat Risk.
Thursday night through Friday...
Limited Thunderstorm Risk.
DISCUSSION...
Thunderstorms with torrential rain and localized flash flooding
may persist south of I-80 on Sunday.
Dangerous heat and humidity are possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed late this morning and afternoon.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-southeast at 40 mph.
https://wxn.io/p29xj
Friday, July 18, 2025
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 182013
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
313 PM CDT Fri Jul 18 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
313 PM CDT Fri Jul 18 2025 /413 PM EDT Fri Jul 18 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk Late Tonight.
DISCUSSION...
A line of decaying thunderstorms may bring gusty winds to
northern Illinois west of the Chicago metro toward sunrise
Saturday morning.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
Saturday...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Elevated Flooding Risk.
Sunday...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk south of I-80.
Elevated Flooding Risk south of Dixon to Watseka line.
Monday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Tuesday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Wednesday and Thursday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
DISCUSSION...
Several rounds of thunderstorms may occur through early next
week with strong to severe thunderstorms possible along with
torrential rain and localized flash flooding. The greatest
chances will remain south of I-80.
Dangerous heat and humidity is possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the southeast at 30 mph.
https://wxn.io/32y01
FLUS43 KLOT 182013
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
313 PM CDT Fri Jul 18 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
313 PM CDT Fri Jul 18 2025 /413 PM EDT Fri Jul 18 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk Late Tonight.
DISCUSSION...
A line of decaying thunderstorms may bring gusty winds to
northern Illinois west of the Chicago metro toward sunrise
Saturday morning.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
Saturday...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Elevated Flooding Risk.
Sunday...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk south of I-80.
Elevated Flooding Risk south of Dixon to Watseka line.
Monday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Tuesday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Wednesday and Thursday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
DISCUSSION...
Several rounds of thunderstorms may occur through early next
week with strong to severe thunderstorms possible along with
torrential rain and localized flash flooding. The greatest
chances will remain south of I-80.
Dangerous heat and humidity is possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the southeast at 30 mph.
https://wxn.io/32y01
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 180900
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
400 AM CDT Fri Jul 18 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
400 AM CDT Fri Jul 18 2025 /500 AM EDT Fri Jul 18 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk late tonight.
DISCUSSION...
A line of decaying thunderstorms may bring gusty winds to northern
Illinois west of the Chicago metro toward sunrise Saturday.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
Saturday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Sunday through Monday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Tuesday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Wednesday and Thursday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
DISCUSSION...
Several rounds of thunderstorms may occur through early next
week with strong to severe thunderstorms possible along with
torrential rain and localized flash flooding. The greatest chances
will remain south of I-80.
Dangerous heat and humidity is possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east at 30 mph.
https://wxn.io/45unl
FLUS43 KLOT 180900
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
400 AM CDT Fri Jul 18 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
400 AM CDT Fri Jul 18 2025 /500 AM EDT Fri Jul 18 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk late tonight.
DISCUSSION...
A line of decaying thunderstorms may bring gusty winds to northern
Illinois west of the Chicago metro toward sunrise Saturday.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
Saturday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Sunday through Monday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Tuesday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Wednesday and Thursday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
DISCUSSION...
Several rounds of thunderstorms may occur through early next
week with strong to severe thunderstorms possible along with
torrential rain and localized flash flooding. The greatest chances
will remain south of I-80.
Dangerous heat and humidity is possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east at 30 mph.
https://wxn.io/45unl
Thursday, July 17, 2025
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 172021
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
321 PM CDT Thu Jul 17 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
321 PM CDT Thu Jul 17 2025 /421 PM EDT Thu Jul 17 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
High Swim Risk Lake Michigan Beaches.
DISCUSSION...
High waves and dangerous swimming conditions will continue at
Lake Michigan beaches through Friday morning.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday Morning...
High Swim Risk Lake Michigan Beaches.
Friday Night...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Saturday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Sunday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Monday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Wednesday...
Elevated Excessive Heat Risk.
DISCUSSION...
Several rounds of thunderstorms may occur through early next
week with strong to severe thunderstorms possible along with
torrential rain and localized flash flooding.
Dangerous heat and humidity is possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/zg575
FLUS43 KLOT 172021
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
321 PM CDT Thu Jul 17 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
321 PM CDT Thu Jul 17 2025 /421 PM EDT Thu Jul 17 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
High Swim Risk Lake Michigan Beaches.
DISCUSSION...
High waves and dangerous swimming conditions will continue at
Lake Michigan beaches through Friday morning.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday Morning...
High Swim Risk Lake Michigan Beaches.
Friday Night...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Saturday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Sunday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Monday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Wednesday...
Elevated Excessive Heat Risk.
DISCUSSION...
Several rounds of thunderstorms may occur through early next
week with strong to severe thunderstorms possible along with
torrential rain and localized flash flooding.
Dangerous heat and humidity is possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/zg575
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 171637 AAA
HWOLOT
Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
1137 AM CDT Thu Jul 17 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1137 AM CDT Thu Jul 17 2025 /1237 PM EDT Thu Jul 17 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
High Swim Risk Lake Michigan Beaches.
DISCUSSION...
High waves and life threatening currents are expected at
unprotected Lake Michigan beaches.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday morning...
High Swim Risk Lake Michigan Beaches.
Friday night...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Saturday...
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Elevated Flooding Risk.
Sunday and Monday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Wednesday...
Elevated Excessive Heat Risk.
DISCUSSION...
High waves will cause dangerous swimming conditions at Lake
Michigan beaches early Friday morning.
There will be periodic bouts of showers and thunderstorms Friday
night through Tuesday. Any storms during this period may be strong
to severe capable of producing damaging winds and torrential
rainfall which could lead to flash flooding.
Dangerous heat and humidity is possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/z95xz
FLUS43 KLOT 171637 AAA
HWOLOT
Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
1137 AM CDT Thu Jul 17 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1137 AM CDT Thu Jul 17 2025 /1237 PM EDT Thu Jul 17 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
High Swim Risk Lake Michigan Beaches.
DISCUSSION...
High waves and life threatening currents are expected at
unprotected Lake Michigan beaches.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday morning...
High Swim Risk Lake Michigan Beaches.
Friday night...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Saturday...
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Elevated Flooding Risk.
Sunday and Monday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Wednesday...
Elevated Excessive Heat Risk.
DISCUSSION...
High waves will cause dangerous swimming conditions at Lake
Michigan beaches early Friday morning.
There will be periodic bouts of showers and thunderstorms Friday
night through Tuesday. Any storms during this period may be strong
to severe capable of producing damaging winds and torrential
rainfall which could lead to flash flooding.
Dangerous heat and humidity is possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/z95xz
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 170939
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
439 AM CDT Thu Jul 17 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
439 AM CDT Thu Jul 17 2025 /539 AM EDT Thu Jul 17 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
High Swim Risk Lake Michigan Beaches.
DISCUSSION...
High waves and life threatening currents are expected at
unprotected Lake Michigan beaches.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday morning...
High Swim Risk Lake Michigan Beaches.
Friday night...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Saturday...
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Elevated Flooding Risk.
Sunday and Monday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Wednesday...
Elevated Excessive Heat Risk.
DISCUSSION...
High waves will cause dangerous swimming conditions at Lake
Michigan beaches early Friday morning.
There will be periodic bouts of showers and thunderstorms
Friday night through Tuesday. Any storms during this period may
be strong to severe capable of producing damaging winds and
torrential rainfall which could lead to flash flooding.
Dangerous heat and humidity is possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/zotw3
FLUS43 KLOT 170939
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
439 AM CDT Thu Jul 17 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
439 AM CDT Thu Jul 17 2025 /539 AM EDT Thu Jul 17 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
High Swim Risk Lake Michigan Beaches.
DISCUSSION...
High waves and life threatening currents are expected at
unprotected Lake Michigan beaches.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday morning...
High Swim Risk Lake Michigan Beaches.
Friday night...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Saturday...
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Elevated Flooding Risk.
Sunday and Monday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Wednesday...
Elevated Excessive Heat Risk.
DISCUSSION...
High waves will cause dangerous swimming conditions at Lake
Michigan beaches early Friday morning.
There will be periodic bouts of showers and thunderstorms
Friday night through Tuesday. Any storms during this period may
be strong to severe capable of producing damaging winds and
torrential rainfall which could lead to flash flooding.
Dangerous heat and humidity is possible the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/zotw3
Wednesday, July 16, 2025
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 162235
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
535 PM CDT Wed Jul 16 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
535 PM CDT Wed Jul 16 2025 /635 PM EDT Wed Jul 16 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
No hazardous weather is expected at this time.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday...
High Swim Risk Lake Michigan Beaches.
Friday Night...
Limited Thunderstorm Risk.
Saturday...
Elevated Thunderstorm Risk.
Elevated Flooding Risk.
Sunday and Monday...
Limited Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
DISCUSSION...
High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through early Friday morning.
There will be periodic bouts of showers and thunderstorms
Friday night through Tuesday. Any storms during this period may
be strong to severe with damaging winds and flash flooding.
Dangerous heat and humidity may arrive midweek next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed anymore.
https://wxn.io/n4v6b
FLUS43 KLOT 162235
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
535 PM CDT Wed Jul 16 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
535 PM CDT Wed Jul 16 2025 /635 PM EDT Wed Jul 16 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
No hazardous weather is expected at this time.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday...
High Swim Risk Lake Michigan Beaches.
Friday Night...
Limited Thunderstorm Risk.
Saturday...
Elevated Thunderstorm Risk.
Elevated Flooding Risk.
Sunday and Monday...
Limited Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
DISCUSSION...
High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through early Friday morning.
There will be periodic bouts of showers and thunderstorms
Friday night through Tuesday. Any storms during this period may
be strong to severe with damaging winds and flash flooding.
Dangerous heat and humidity may arrive midweek next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed anymore.
https://wxn.io/n4v6b
Severe Thunderstorm Watch Cancellation for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
WWUS63 KLOT 162105
WCNLOT
WATCH COUNTY NOTIFICATION FOR WATCH 518
NATIONAL WEATHER SERVICE CHICAGO IL
405 PM CDT WED JUL 16 2025
/O.CAN.KLOT.SV.A.0518.000000T0000Z-250717T0100Z/
THE NATIONAL WEATHER SERVICE HAS CANCELLED SEVERE THUNDERSTORM
WATCH 518 FOR THE FOLLOWING AREAS
IN ILLINOIS THIS CANCELS 9 COUNTIES
IN NORTH CENTRAL ILLINOIS
BOONE DE KALB LA SALLE
IN NORTHEAST ILLINOIS
DUPAGE GRUNDY KANE
KENDALL LAKE IL MCHENRY
THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE,
BUFFALO GROVE, CAROL STREAM, COAL CITY, CRYSTAL LAKE, DEKALB,
DOWNERS GROVE, ELGIN, GURNEE, LA SALLE, LOMBARD, MARSEILLES,
MCHENRY, MENDOTA, MINOOKA, MORRIS, MUNDELEIN, NAPERVILLE, OSWEGO,
OTTAWA, PLANO, STREATOR, SYCAMORE, WAUKEGAN, WHEATON, WOODSTOCK,
AND YORKVILLE.
https://wxn.io/md47j
WWUS63 KLOT 162105
WCNLOT
WATCH COUNTY NOTIFICATION FOR WATCH 518
NATIONAL WEATHER SERVICE CHICAGO IL
405 PM CDT WED JUL 16 2025
/O.CAN.KLOT.SV.A.0518.000000T0000Z-250717T0100Z/
THE NATIONAL WEATHER SERVICE HAS CANCELLED SEVERE THUNDERSTORM
WATCH 518 FOR THE FOLLOWING AREAS
IN ILLINOIS THIS CANCELS 9 COUNTIES
IN NORTH CENTRAL ILLINOIS
BOONE DE KALB LA SALLE
IN NORTHEAST ILLINOIS
DUPAGE GRUNDY KANE
KENDALL LAKE IL MCHENRY
THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE,
BUFFALO GROVE, CAROL STREAM, COAL CITY, CRYSTAL LAKE, DEKALB,
DOWNERS GROVE, ELGIN, GURNEE, LA SALLE, LOMBARD, MARSEILLES,
MCHENRY, MENDOTA, MINOOKA, MORRIS, MUNDELEIN, NAPERVILLE, OSWEGO,
OTTAWA, PLANO, STREATOR, SYCAMORE, WAUKEGAN, WHEATON, WOODSTOCK,
AND YORKVILLE.
https://wxn.io/md47j
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 162037
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
337 PM CDT Wed Jul 16 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
337 PM CDT Wed Jul 16 2025 /437 PM EDT Wed Jul 16 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Damaging Wind Risk...up to 70 mph.
DISCUSSION...
A line of strong to severe thunderstorms producing damaging winds
will affect areas from the Chicago metro and points south and east
through the early evening.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday...
High Swim Risk Lake Michigan Beaches.
Friday Night...
Limited Thunderstorm Risk.
Saturday...
Elevated Thunderstorm Risk.
Elevated Flooding Risk.
Sunday and Monday...
Limited Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
DISCUSSION...
High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through early Friday morning.
There will be periodic bouts of showers and thunderstorms
Friday night through Tuesday. Any storms during this period may be
strong to severe with damaging winds and flash flooding.
Dangerous heat and humidity may arrive midweek next week.
.SPOTTER INFORMATION STATEMENT...
Spotters will be needed through early this evening.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-northeast at 30 to 40 mph.
https://wxn.io/7lkx4
FLUS43 KLOT 162037
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
337 PM CDT Wed Jul 16 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
337 PM CDT Wed Jul 16 2025 /437 PM EDT Wed Jul 16 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Damaging Wind Risk...up to 70 mph.
DISCUSSION...
A line of strong to severe thunderstorms producing damaging winds
will affect areas from the Chicago metro and points south and east
through the early evening.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday...
High Swim Risk Lake Michigan Beaches.
Friday Night...
Limited Thunderstorm Risk.
Saturday...
Elevated Thunderstorm Risk.
Elevated Flooding Risk.
Sunday and Monday...
Limited Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
DISCUSSION...
High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through early Friday morning.
There will be periodic bouts of showers and thunderstorms
Friday night through Tuesday. Any storms during this period may be
strong to severe with damaging winds and flash flooding.
Dangerous heat and humidity may arrive midweek next week.
.SPOTTER INFORMATION STATEMENT...
Spotters will be needed through early this evening.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-northeast at 30 to 40 mph.
https://wxn.io/7lkx4
Severe Thunderstorm Watch for McHenry Co., IL until 8:00 PM CDT 7/16
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
WWUS63 KLOT 161928
WCNLOT
WATCH COUNTY NOTIFICATION FOR WATCH 518
NATIONAL WEATHER SERVICE CHICAGO IL
228 PM CDT WED JUL 16 2025
/O.CON.KLOT.SV.A.0518.000000T0000Z-250717T0100Z/
SEVERE THUNDERSTORM WATCH 518 REMAINS VALID UNTIL 8 PM CDT THIS
EVENING FOR THE FOLLOWING AREAS
IN ILLINOIS THIS WATCH INCLUDES 12 COUNTIES
IN NORTH CENTRAL ILLINOIS
BOONE DE KALB LA SALLE
IN NORTHEAST ILLINOIS
COOK DUPAGE GRUNDY
KANE KANKAKEE KENDALL
LAKE IL MCHENRY WILL
IN INDIANA THIS WATCH INCLUDES 2 COUNTIES
IN NORTHWEST INDIANA
LAKE IN PORTER
THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE,
BOLINGBROOK, BOURBONNAIS, BUFFALO GROVE, CAROL STREAM,
CHESTERTON, CHICAGO, COAL CITY, CRYSTAL LAKE, DEKALB,
DOWNERS GROVE, ELGIN, EVANSTON, GARY, GURNEE, HAMMOND, JOLIET,
KANKAKEE, LA SALLE, LEMONT, LOMBARD, MARSEILLES, MCHENRY,
MENDOTA, MERRILLVILLE, MINOOKA, MORRIS, MUNDELEIN, NAPERVILLE,
OAK LAWN, ORLAND PARK, OSWEGO, OTTAWA, PARK FOREST, PLANO,
PORTAGE, SCHAUMBURG, STREATOR, SYCAMORE, VALPARAISO, WAUKEGAN,
WHEATON, WILMINGTON, WOODSTOCK, AND YORKVILLE.
https://wxn.io/ohwko
WWUS63 KLOT 161928
WCNLOT
WATCH COUNTY NOTIFICATION FOR WATCH 518
NATIONAL WEATHER SERVICE CHICAGO IL
228 PM CDT WED JUL 16 2025
/O.CON.KLOT.SV.A.0518.000000T0000Z-250717T0100Z/
SEVERE THUNDERSTORM WATCH 518 REMAINS VALID UNTIL 8 PM CDT THIS
EVENING FOR THE FOLLOWING AREAS
IN ILLINOIS THIS WATCH INCLUDES 12 COUNTIES
IN NORTH CENTRAL ILLINOIS
BOONE DE KALB LA SALLE
IN NORTHEAST ILLINOIS
COOK DUPAGE GRUNDY
KANE KANKAKEE KENDALL
LAKE IL MCHENRY WILL
IN INDIANA THIS WATCH INCLUDES 2 COUNTIES
IN NORTHWEST INDIANA
LAKE IN PORTER
THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE,
BOLINGBROOK, BOURBONNAIS, BUFFALO GROVE, CAROL STREAM,
CHESTERTON, CHICAGO, COAL CITY, CRYSTAL LAKE, DEKALB,
DOWNERS GROVE, ELGIN, EVANSTON, GARY, GURNEE, HAMMOND, JOLIET,
KANKAKEE, LA SALLE, LEMONT, LOMBARD, MARSEILLES, MCHENRY,
MENDOTA, MERRILLVILLE, MINOOKA, MORRIS, MUNDELEIN, NAPERVILLE,
OAK LAWN, ORLAND PARK, OSWEGO, OTTAWA, PARK FOREST, PLANO,
PORTAGE, SCHAUMBURG, STREATOR, SYCAMORE, VALPARAISO, WAUKEGAN,
WHEATON, WILMINGTON, WOODSTOCK, AND YORKVILLE.
https://wxn.io/ohwko
Severe Thunderstorm Watch for McHenry Co., IL until 8:00 PM CDT 7/16
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
WWUS63 KLOT 161737
WCNLOT
WATCH COUNTY NOTIFICATION FOR WATCH 518
NATIONAL WEATHER SERVICE CHICAGO IL
1237 PM CDT WED JUL 16 2025
/O.NEW.KLOT.SV.A.0518.250716T1737Z-250717T0100Z/
THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
518 IN EFFECT UNTIL 8 PM CDT THIS EVENING FOR THE FOLLOWING AREAS
IN ILLINOIS THIS WATCH INCLUDES 15 COUNTIES
IN NORTH CENTRAL ILLINOIS
BOONE DE KALB LA SALLE
LEE OGLE WINNEBAGO
IN NORTHEAST ILLINOIS
COOK DUPAGE GRUNDY
KANE KANKAKEE KENDALL
LAKE IL MCHENRY WILL
IN INDIANA THIS WATCH INCLUDES 2 COUNTIES
IN NORTHWEST INDIANA
LAKE IN PORTER
THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE,
BOLINGBROOK, BOURBONNAIS, BUFFALO GROVE, BYRON, CAROL STREAM,
CHESTERTON, CHICAGO, COAL CITY, CRYSTAL LAKE, DEKALB, DIXON,
DOWNERS GROVE, ELGIN, EVANSTON, GARY, GURNEE, HAMMOND, JOLIET,
KANKAKEE, LA SALLE, LEMONT, LOMBARD, MARSEILLES, MCHENRY,
MENDOTA, MERRILLVILLE, MINOOKA, MORRIS, MUNDELEIN, NAPERVILLE,
OAK LAWN, OREGON, ORLAND PARK, OSWEGO, OTTAWA, PARK FOREST,
PLANO, PORTAGE, ROCHELLE, ROCKFORD, SCHAUMBURG, STREATOR,
SYCAMORE, VALPARAISO, WAUKEGAN, WHEATON, WILMINGTON, WOODSTOCK,
AND YORKVILLE.
https://wxn.io/6ck88
WWUS63 KLOT 161737
WCNLOT
WATCH COUNTY NOTIFICATION FOR WATCH 518
NATIONAL WEATHER SERVICE CHICAGO IL
1237 PM CDT WED JUL 16 2025
/O.NEW.KLOT.SV.A.0518.250716T1737Z-250717T0100Z/
THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
518 IN EFFECT UNTIL 8 PM CDT THIS EVENING FOR THE FOLLOWING AREAS
IN ILLINOIS THIS WATCH INCLUDES 15 COUNTIES
IN NORTH CENTRAL ILLINOIS
BOONE DE KALB LA SALLE
LEE OGLE WINNEBAGO
IN NORTHEAST ILLINOIS
COOK DUPAGE GRUNDY
KANE KANKAKEE KENDALL
LAKE IL MCHENRY WILL
IN INDIANA THIS WATCH INCLUDES 2 COUNTIES
IN NORTHWEST INDIANA
LAKE IN PORTER
THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE,
BOLINGBROOK, BOURBONNAIS, BUFFALO GROVE, BYRON, CAROL STREAM,
CHESTERTON, CHICAGO, COAL CITY, CRYSTAL LAKE, DEKALB, DIXON,
DOWNERS GROVE, ELGIN, EVANSTON, GARY, GURNEE, HAMMOND, JOLIET,
KANKAKEE, LA SALLE, LEMONT, LOMBARD, MARSEILLES, MCHENRY,
MENDOTA, MERRILLVILLE, MINOOKA, MORRIS, MUNDELEIN, NAPERVILLE,
OAK LAWN, OREGON, ORLAND PARK, OSWEGO, OTTAWA, PARK FOREST,
PLANO, PORTAGE, ROCHELLE, ROCKFORD, SCHAUMBURG, STREATOR,
SYCAMORE, VALPARAISO, WAUKEGAN, WHEATON, WILMINGTON, WOODSTOCK,
AND YORKVILLE.
https://wxn.io/6ck88
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 161637
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1137 AM CDT Wed Jul 16 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1137 AM CDT Wed Jul 16 2025 /1237 PM EDT Wed Jul 16 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Damaging Wind Risk...60 to 75 mph.
Level 1 of 5 Damaging Hail Risk...1 to 1.5 inches in diameter.
Level 1 of 5 Tornado Risk.
Limited Flooding Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Scattered strong to severe storms will develop across the area
this afternoon. The greatest threats with the storms will be
damaging winds and hail. A tornado or flash flooding cannot be
ruled out.
Peak heat indices this afternoon could reach 100 degrees.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday and Friday...
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Friday night through Monday...
Limited to Elevated Flooding Risk.
Limited to Elevated Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through early Friday morning.
There will be periodic bouts of showers and thunderstorms
Friday night through Monday. Any storm during this period may be
severe with damaging winds and flash flooding.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed this afternoon and evening.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east at 35 to 45 m...
https://wxn.io/y3qep
FLUS43 KLOT 161637
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1137 AM CDT Wed Jul 16 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1137 AM CDT Wed Jul 16 2025 /1237 PM EDT Wed Jul 16 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Damaging Wind Risk...60 to 75 mph.
Level 1 of 5 Damaging Hail Risk...1 to 1.5 inches in diameter.
Level 1 of 5 Tornado Risk.
Limited Flooding Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Scattered strong to severe storms will develop across the area
this afternoon. The greatest threats with the storms will be
damaging winds and hail. A tornado or flash flooding cannot be
ruled out.
Peak heat indices this afternoon could reach 100 degrees.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday and Friday...
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Friday night through Monday...
Limited to Elevated Flooding Risk.
Limited to Elevated Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through early Friday morning.
There will be periodic bouts of showers and thunderstorms
Friday night through Monday. Any storm during this period may be
severe with damaging winds and flash flooding.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed this afternoon and evening.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east at 35 to 45 m...
https://wxn.io/y3qep
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 160940
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
440 AM CDT Wed Jul 16 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
440 AM CDT Wed Jul 16 2025 /540 AM EDT Wed Jul 16 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Damaging Wind Risk...up to 60 mph.
Level 1 of 5 Tornado Risk.
Limited Flooding Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Scattered to numerous thunderstorms are expected this afternoon.
The strongest storms will be capable of producing damaging winds.
Localized flash flooding and a tornado cannot be ruled out.
Peak heat indices this afternoon could reach 100 degrees.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday and Friday...
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Friday night through Monday...
Limited to Elevated Flooding Risk.
Limited to Elevated Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through early Friday morning.
There will be periodic bouts of showers and thunderstorms
Friday night through Monday. Any storm during this period may be
severe with damaging winds and flash flooding.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed this afternoon and evening.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-northeast at 35 to 45 mph.
https://wxn.io/sx8ou
FLUS43 KLOT 160940
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
440 AM CDT Wed Jul 16 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
440 AM CDT Wed Jul 16 2025 /540 AM EDT Wed Jul 16 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Damaging Wind Risk...up to 60 mph.
Level 1 of 5 Tornado Risk.
Limited Flooding Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Scattered to numerous thunderstorms are expected this afternoon.
The strongest storms will be capable of producing damaging winds.
Localized flash flooding and a tornado cannot be ruled out.
Peak heat indices this afternoon could reach 100 degrees.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday and Friday...
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Friday night through Monday...
Limited to Elevated Flooding Risk.
Limited to Elevated Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through early Friday morning.
There will be periodic bouts of showers and thunderstorms
Friday night through Monday. Any storm during this period may be
severe with damaging winds and flash flooding.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed this afternoon and evening.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-northeast at 35 to 45 mph.
https://wxn.io/sx8ou
Tuesday, July 15, 2025
Air Quality Alert for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
AEUS73 KLOT 160337
AQALOT
Air Quality Alert Message
Relayed by National Weather Service Chicago IL
1037 PM CDT Tue Jul 15 2025
McHenry-Lake IL-Kane-DuPage-Kendall-Grundy-Northern Cook-
Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-
Including the cities of Crystal Lake, Algonquin, McHenry, Woodstock,
Waukegan, Buffalo Grove, Mundelein, Gurnee, Aurora, Elgin,
Naperville, Wheaton, Downers Grove, Lombard, Carol Stream, Oswego,
Yorkville, Plano, Morris, Coal City, Minooka, Evanston, Des Plaines,
Schaumburg, Palatine, Northbrook, Chicago, Cicero, Oak Lawn,
Oak Park, La Grange, Calumet City, Oak Forest, Lemont, Orland Park,
Park Forest, Joliet, Bolingbrook, Plainfield, Mokena, Channahon,
Manhattan, Wilmington, Crete, Peotone, and Beecher
1037 PM CDT Tue Jul 15 2025
...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT CDT WEDNESDAY NIGHT...
The Illinois Environmental Protection Agency has issued an Air
Pollution Action Day for Wednesday July 16th for the greater Chicago
metropolitan area through Wednesday night.
A Chicago Area "Air Pollution Action Day" is declared when weather
conditions are such that widespread ozone and or particulate levels
are expected to be at or above the Unhealthy for Sensitive Groups
(UGS) category of the Air Quality Index (AQI) for multiple days.
Ozone is expected to be the primary pollutant of concern.
Active children and adults, especially people with pulmonary or
respiratory disease such as asthma, should limit prolonged outdoor
activity.
Area residents are urged to reduce pollution levels. Air quality
forecasts, current air quality, and tips on how you can reduce your
emissions can be found at www.airnow.gov.
Media contact...Illinois EPA.
https://wxn.io/khvtg
AEUS73 KLOT 160337
AQALOT
Air Quality Alert Message
Relayed by National Weather Service Chicago IL
1037 PM CDT Tue Jul 15 2025
McHenry-Lake IL-Kane-DuPage-Kendall-Grundy-Northern Cook-
Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-
Including the cities of Crystal Lake, Algonquin, McHenry, Woodstock,
Waukegan, Buffalo Grove, Mundelein, Gurnee, Aurora, Elgin,
Naperville, Wheaton, Downers Grove, Lombard, Carol Stream, Oswego,
Yorkville, Plano, Morris, Coal City, Minooka, Evanston, Des Plaines,
Schaumburg, Palatine, Northbrook, Chicago, Cicero, Oak Lawn,
Oak Park, La Grange, Calumet City, Oak Forest, Lemont, Orland Park,
Park Forest, Joliet, Bolingbrook, Plainfield, Mokena, Channahon,
Manhattan, Wilmington, Crete, Peotone, and Beecher
1037 PM CDT Tue Jul 15 2025
...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT CDT WEDNESDAY NIGHT...
The Illinois Environmental Protection Agency has issued an Air
Pollution Action Day for Wednesday July 16th for the greater Chicago
metropolitan area through Wednesday night.
A Chicago Area "Air Pollution Action Day" is declared when weather
conditions are such that widespread ozone and or particulate levels
are expected to be at or above the Unhealthy for Sensitive Groups
(UGS) category of the Air Quality Index (AQI) for multiple days.
Ozone is expected to be the primary pollutant of concern.
Active children and adults, especially people with pulmonary or
respiratory disease such as asthma, should limit prolonged outdoor
activity.
Area residents are urged to reduce pollution levels. Air quality
forecasts, current air quality, and tips on how you can reduce your
emissions can be found at www.airnow.gov.
Media contact...Illinois EPA.
https://wxn.io/khvtg
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 160235
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
935 PM CDT Tue Jul 15 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
935 PM CDT Tue Jul 15 2025 /1035 PM EDT Tue Jul 15 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
No hazardous weather is expected at this time.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Level 2 of 4 Flash Flooding Risk.
Limited Excessive Heat Risk.
Thursday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Friday...
High Swim Risk Lake Michigan Beaches.
Saturday through Monday...
Limited to Elevated Flooding Risk.
Limited to Elevated Thunderstorm Risk.
DISCUSSION...
Scattered severe storms are possible Wednesday afternoon with
damaging winds and damaging hail as the main threats. Flash
flooding may also occur, particularly where thunderstorms move
over the same areas.
High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through Friday.
There will be periodic bouts of showers and thunderstorms
Saturday through Monday. Any storm during this period may be
severe with damaging winds and flash flooding.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/dj29x
FLUS43 KLOT 160235
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
935 PM CDT Tue Jul 15 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
935 PM CDT Tue Jul 15 2025 /1035 PM EDT Tue Jul 15 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
No hazardous weather is expected at this time.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Level 2 of 4 Flash Flooding Risk.
Limited Excessive Heat Risk.
Thursday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Friday...
High Swim Risk Lake Michigan Beaches.
Saturday through Monday...
Limited to Elevated Flooding Risk.
Limited to Elevated Thunderstorm Risk.
DISCUSSION...
Scattered severe storms are possible Wednesday afternoon with
damaging winds and damaging hail as the main threats. Flash
flooding may also occur, particularly where thunderstorms move
over the same areas.
High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through Friday.
There will be periodic bouts of showers and thunderstorms
Saturday through Monday. Any storm during this period may be
severe with damaging winds and flash flooding.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/dj29x
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 151937
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
237 PM CDT Tue Jul 15 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
237 PM CDT Tue Jul 15 2025 /337 PM EDT Tue Jul 15 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk.
DISCUSSION...
Isolated thunderstorms will continue through this evening,
especially south of I-80. No severe weather is expected.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Level 2 of 4 Flash Flooding Risk.
Limited Excessive Heat Risk.
Thursday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Friday...
High Swim Risk Lake Michigan Beaches.
Saturday through Monday...
Limited to Elevated Flooding Risk.
Limited to Elevated Thunderstorm Risk.
DISCUSSION...
Scattered severe storms are possible Wednesday afternoon with
damaging winds and damaging hail as the main threats. Flash
flooding may also occur where thunderstorms train.
High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through Friday.
There will be periodic bouts of showers and thunderstorms
Saturday through Monday. Any storm during this period may be
severe with damaging winds and flash flooding.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the north at 10 mph.
https://wxn.io/60r95
FLUS43 KLOT 151937
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
237 PM CDT Tue Jul 15 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
237 PM CDT Tue Jul 15 2025 /337 PM EDT Tue Jul 15 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk.
DISCUSSION...
Isolated thunderstorms will continue through this evening,
especially south of I-80. No severe weather is expected.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Level 2 of 4 Flash Flooding Risk.
Limited Excessive Heat Risk.
Thursday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Friday...
High Swim Risk Lake Michigan Beaches.
Saturday through Monday...
Limited to Elevated Flooding Risk.
Limited to Elevated Thunderstorm Risk.
DISCUSSION...
Scattered severe storms are possible Wednesday afternoon with
damaging winds and damaging hail as the main threats. Flash
flooding may also occur where thunderstorms train.
High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through Friday.
There will be periodic bouts of showers and thunderstorms
Saturday through Monday. Any storm during this period may be
severe with damaging winds and flash flooding.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the north at 10 mph.
https://wxn.io/60r95
Air Quality Alert for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
AEUS73 KLOT 151642
AQALOT
Air Quality Alert Message
Relayed by National Weather Service Chicago IL
1142 AM CDT Tue Jul 15 2025
McHenry-Lake IL-Kane-DuPage-Kendall-Grundy-Northern Cook-
Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-
Including the cities of Crystal Lake, Algonquin, McHenry, Woodstock,
Waukegan, Buffalo Grove, Mundelein, Gurnee, Aurora, Elgin,
Naperville, Wheaton, Downers Grove, Lombard, Carol Stream, Oswego,
Yorkville, Plano, Morris, Coal City, Minooka, Evanston, Des Plaines,
Schaumburg, Palatine, Northbrook, Chicago, Cicero, Oak Lawn,
Oak Park, La Grange, Calumet City, Oak Forest, Lemont, Orland Park,
Park Forest, Joliet, Bolingbrook, Plainfield, Mokena, Channahon,
Manhattan, Wilmington, Crete, Peotone, and Beecher
1142 AM CDT Tue Jul 15 2025
...AIR QUALITY ALERT NOW IN EFFECT THROUGH WEDNESDAY NIGHT...
The Illinois Environmental Protection Agency has issued an Air
Pollution Action Day for Wednesday July 16th for the greater Chicago
metropolitan area through Wednesday night.
A Chicago Area "Air Pollution Action Day" is declared when weather
conditions are such that widespread ozone and or particulate levels
are expected to be at or above the Unhealthy for Sensitive Groups
(UGS) category of the Air Quality Index (AQI) for multiple days.
Ozone is expected to be the primary pollutant of concern.
Active children and adults, especially people with pulmonary or
respiratory disease such as asthma, should limit prolonged outdoor
activity.
Area residents are urged to reduce pollution levels. Air quality
forecasts, current air quality, and tips on how you can reduce your
emissions can be found at www.airnow.gov.
Media contact...Illinois EPA.
https://wxn.io/qkm8p
AEUS73 KLOT 151642
AQALOT
Air Quality Alert Message
Relayed by National Weather Service Chicago IL
1142 AM CDT Tue Jul 15 2025
McHenry-Lake IL-Kane-DuPage-Kendall-Grundy-Northern Cook-
Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-
Including the cities of Crystal Lake, Algonquin, McHenry, Woodstock,
Waukegan, Buffalo Grove, Mundelein, Gurnee, Aurora, Elgin,
Naperville, Wheaton, Downers Grove, Lombard, Carol Stream, Oswego,
Yorkville, Plano, Morris, Coal City, Minooka, Evanston, Des Plaines,
Schaumburg, Palatine, Northbrook, Chicago, Cicero, Oak Lawn,
Oak Park, La Grange, Calumet City, Oak Forest, Lemont, Orland Park,
Park Forest, Joliet, Bolingbrook, Plainfield, Mokena, Channahon,
Manhattan, Wilmington, Crete, Peotone, and Beecher
1142 AM CDT Tue Jul 15 2025
...AIR QUALITY ALERT NOW IN EFFECT THROUGH WEDNESDAY NIGHT...
The Illinois Environmental Protection Agency has issued an Air
Pollution Action Day for Wednesday July 16th for the greater Chicago
metropolitan area through Wednesday night.
A Chicago Area "Air Pollution Action Day" is declared when weather
conditions are such that widespread ozone and or particulate levels
are expected to be at or above the Unhealthy for Sensitive Groups
(UGS) category of the Air Quality Index (AQI) for multiple days.
Ozone is expected to be the primary pollutant of concern.
Active children and adults, especially people with pulmonary or
respiratory disease such as asthma, should limit prolonged outdoor
activity.
Area residents are urged to reduce pollution levels. Air quality
forecasts, current air quality, and tips on how you can reduce your
emissions can be found at www.airnow.gov.
Media contact...Illinois EPA.
https://wxn.io/qkm8p
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 151542
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1042 AM CDT Tue Jul 15 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1042 AM CDT Tue Jul 15 2025 /1142 AM EDT Tue Jul 15 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk south of I-80.
DISCUSSION...
Isolated thunderstorms are possible this afternoon into this
evening, mainly south of I-80. No severe weather is expected.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Elevated Flooding Risk.
Limited Excessive Heat Risk.
Thursday...
High Swim Risk.
Limited Flooding Risk south of I-80.
Limited Thunderstorm Risk south of I-80.
Friday...
High Swim Risk.
Saturday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Sunday and Monday...
Limited Thunderstorm Risk.
DISCUSSION...
Peak heat indices Wednesday afternoon are expected to be around
100 degrees.
Thunderstorms are likely Wednesday afternoon into Wednesday
evening, mainly across northern Illinois. There is the threat
that some of the storms could become severe, posing a risk of
damaging winds. In addition, thunderstorms will be capable of
producing torrential downpours which could lead localized flash
flooding.
There will be periodic bouts of showers and thunderstorms
Saturday through Monday. Any one of which could produce very
heavy rainfall and flooding.
High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through Friday.
.SPO...
https://wxn.io/zwhcw
FLUS43 KLOT 151542
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1042 AM CDT Tue Jul 15 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1042 AM CDT Tue Jul 15 2025 /1142 AM EDT Tue Jul 15 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk south of I-80.
DISCUSSION...
Isolated thunderstorms are possible this afternoon into this
evening, mainly south of I-80. No severe weather is expected.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Elevated Flooding Risk.
Limited Excessive Heat Risk.
Thursday...
High Swim Risk.
Limited Flooding Risk south of I-80.
Limited Thunderstorm Risk south of I-80.
Friday...
High Swim Risk.
Saturday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Sunday and Monday...
Limited Thunderstorm Risk.
DISCUSSION...
Peak heat indices Wednesday afternoon are expected to be around
100 degrees.
Thunderstorms are likely Wednesday afternoon into Wednesday
evening, mainly across northern Illinois. There is the threat
that some of the storms could become severe, posing a risk of
damaging winds. In addition, thunderstorms will be capable of
producing torrential downpours which could lead localized flash
flooding.
There will be periodic bouts of showers and thunderstorms
Saturday through Monday. Any one of which could produce very
heavy rainfall and flooding.
High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through Friday.
.SPO...
https://wxn.io/zwhcw
Air Quality Alert for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
AEUS73 KLOT 151538
AQALOT
Air Quality Alert Message
Relayed by National Weather Service Chicago IL
1038 AM CDT Tue Jul 15 2025
McHenry-Lake IL-Kane-DuPage-Kendall-Grundy-Northern Cook-
Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-
Including the cities of Crystal Lake, Algonquin, McHenry, Woodstock,
Waukegan, Buffalo Grove, Mundelein, Gurnee, Aurora, Elgin,
Naperville, Wheaton, Downers Grove, Lombard, Carol Stream, Oswego,
Yorkville, Plano, Morris, Coal City, Minooka, Evanston, Des Plaines,
Schaumburg, Palatine, Northbrook, Chicago, Cicero, Oak Lawn,
Oak Park, La Grange, Calumet City, Oak Forest, Lemont, Orland Park,
Park Forest, Joliet, Bolingbrook, Plainfield, Mokena, Channahon,
Manhattan, Wilmington, Crete, Peotone, and Beecher
1038 AM CDT Tue Jul 15 2025
...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT CDT TONIGHT...
The Illinois Environmental Protection Agency has determined that an
Air Pollution Action Day will be declared for the greater Chicago
Metropolitan Area and is IN EFFECT UNTIL MIDNIGHT CDT TONIGHT.
An Air Pollution Action Day is declared when weather conditions are
such that widespread ozone and or particulate levels are expected to
be at or above the Unhealthy for Sensitive Groups category of the
Air Quality Index for multiple days.
Active children and adults, especially people with pulmonary or
respiratory disease such as asthma, should limit prolonged outdoor
activity.
Area residents are urged to reduce pollution levels. Air quality
forecasts, current air quality, and tips on how you can reduce your
emissions can be found at www.airnow.gov.
Media contact...Illinois EPA.
https://wxn.io/04m9f
AEUS73 KLOT 151538
AQALOT
Air Quality Alert Message
Relayed by National Weather Service Chicago IL
1038 AM CDT Tue Jul 15 2025
McHenry-Lake IL-Kane-DuPage-Kendall-Grundy-Northern Cook-
Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-
Including the cities of Crystal Lake, Algonquin, McHenry, Woodstock,
Waukegan, Buffalo Grove, Mundelein, Gurnee, Aurora, Elgin,
Naperville, Wheaton, Downers Grove, Lombard, Carol Stream, Oswego,
Yorkville, Plano, Morris, Coal City, Minooka, Evanston, Des Plaines,
Schaumburg, Palatine, Northbrook, Chicago, Cicero, Oak Lawn,
Oak Park, La Grange, Calumet City, Oak Forest, Lemont, Orland Park,
Park Forest, Joliet, Bolingbrook, Plainfield, Mokena, Channahon,
Manhattan, Wilmington, Crete, Peotone, and Beecher
1038 AM CDT Tue Jul 15 2025
...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT CDT TONIGHT...
The Illinois Environmental Protection Agency has determined that an
Air Pollution Action Day will be declared for the greater Chicago
Metropolitan Area and is IN EFFECT UNTIL MIDNIGHT CDT TONIGHT.
An Air Pollution Action Day is declared when weather conditions are
such that widespread ozone and or particulate levels are expected to
be at or above the Unhealthy for Sensitive Groups category of the
Air Quality Index for multiple days.
Active children and adults, especially people with pulmonary or
respiratory disease such as asthma, should limit prolonged outdoor
activity.
Area residents are urged to reduce pollution levels. Air quality
forecasts, current air quality, and tips on how you can reduce your
emissions can be found at www.airnow.gov.
Media contact...Illinois EPA.
https://wxn.io/04m9f
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 150926
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
426 AM CDT Tue Jul 15 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
426 AM CDT Tue Jul 15 2025 /526 AM EDT Tue Jul 15 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk south of I-80.
DISCUSSION...
Widely scattered thunderstorms are expected this afternoon into
early this evening. Where there is a slight chance of
thunderstorms as far north as I-80, the greatest coverage of
storms will likely be near and south of Highway 24.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday afternoon and evening...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Elevated Flooding Risk.
Limited Excessive Heat Risk.
Thursday...
Limited Thunderstorm Risk south of I-80.
Limited Flooding Risk well south of I-80.
Saturday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Sunday and Monday...
Limited Thunderstorm Risk.
DISCUSSION...
Peak heat indices Wednesday afternoon are expected to be around
100 degrees.
Thunderstorms are likely Wednesday afternoon into Wednesday
evening, mainly across northern Illinois. There is the threat that
some of the storms could become severe, posing a risk of locally
damaging winds. In addition, thunderstorms will be capable of
producing torrential downpours which could lead localized flash
flooding.
There will be periodic bouts of showers and thunderstorms
Saturday through Monday. Any one of which could produce very heavy
rainfall and flooding.
.SPOTTER I...
https://wxn.io/hcadp
FLUS43 KLOT 150926
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
426 AM CDT Tue Jul 15 2025
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
426 AM CDT Tue Jul 15 2025 /526 AM EDT Tue Jul 15 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk south of I-80.
DISCUSSION...
Widely scattered thunderstorms are expected this afternoon into
early this evening. Where there is a slight chance of
thunderstorms as far north as I-80, the greatest coverage of
storms will likely be near and south of Highway 24.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday afternoon and evening...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Elevated Flooding Risk.
Limited Excessive Heat Risk.
Thursday...
Limited Thunderstorm Risk south of I-80.
Limited Flooding Risk well south of I-80.
Saturday...
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Sunday and Monday...
Limited Thunderstorm Risk.
DISCUSSION...
Peak heat indices Wednesday afternoon are expected to be around
100 degrees.
Thunderstorms are likely Wednesday afternoon into Wednesday
evening, mainly across northern Illinois. There is the threat that
some of the storms could become severe, posing a risk of locally
damaging winds. In addition, thunderstorms will be capable of
producing torrential downpours which could lead localized flash
flooding.
There will be periodic bouts of showers and thunderstorms
Saturday through Monday. Any one of which could produce very heavy
rainfall and flooding.
.SPOTTER I...
https://wxn.io/hcadp
Monday, July 14, 2025
Air Quality Alert for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
AEUS73 KLOT 150311
AQALOT
Air Quality Alert Message
Relayed by National Weather Service Chicago IL
1011 PM CDT Mon Jul 14 2025
McHenry-Lake IL-Kane-DuPage-Kendall-Grundy-Northern Cook-
Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-
Including the cities of Crystal Lake, Algonquin, McHenry, Woodstock,
Waukegan, Buffalo Grove, Mundelein, Gurnee, Aurora, Elgin,
Naperville, Wheaton, Downers Grove, Lombard, Carol Stream, Oswego,
Yorkville, Plano, Morris, Coal City, Minooka, Evanston, Des Plaines,
Schaumburg, Palatine, Northbrook, Chicago, Cicero, Oak Lawn,
Oak Park, La Grange, Calumet City, Oak Forest, Lemont, Orland Park,
Park Forest, Joliet, Bolingbrook, Plainfield, Mokena, Channahon,
Manhattan, Wilmington, Crete, Peotone, and Beecher
1011 PM CDT Mon Jul 14 2025
...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT CDT TUESDAY NIGHT...
The Illinois Environmental Protection Agency has issued an Air
Pollution Action Day for Tuesday July 15th for the greater Chicago
metropolitan area.
A Chicago area "Air Pollution Action Day" is declared when weather
conditions are such that widespread ozone and or particular levels
are expected to be at or above the Unhealthy for Sensitive Groups
(USG) category of the Air Quality Index (AQI) for multiple days.
Ozone is expected to be the primary pollutant of concern.
Active children and adults, especially people with pulmonary or
respiratory disease such as asthma, should limit prolonged outdoor
activity.
Area residents are urged to reduce pollution levels. Air quality
forecasts, current air quality, and tips on how you can reduce your
emissions can be found at www.airnow.gov.
Media contact...Illinois EPA.
https://wxn.io/pkocj
AEUS73 KLOT 150311
AQALOT
Air Quality Alert Message
Relayed by National Weather Service Chicago IL
1011 PM CDT Mon Jul 14 2025
McHenry-Lake IL-Kane-DuPage-Kendall-Grundy-Northern Cook-
Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-
Including the cities of Crystal Lake, Algonquin, McHenry, Woodstock,
Waukegan, Buffalo Grove, Mundelein, Gurnee, Aurora, Elgin,
Naperville, Wheaton, Downers Grove, Lombard, Carol Stream, Oswego,
Yorkville, Plano, Morris, Coal City, Minooka, Evanston, Des Plaines,
Schaumburg, Palatine, Northbrook, Chicago, Cicero, Oak Lawn,
Oak Park, La Grange, Calumet City, Oak Forest, Lemont, Orland Park,
Park Forest, Joliet, Bolingbrook, Plainfield, Mokena, Channahon,
Manhattan, Wilmington, Crete, Peotone, and Beecher
1011 PM CDT Mon Jul 14 2025
...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT CDT TUESDAY NIGHT...
The Illinois Environmental Protection Agency has issued an Air
Pollution Action Day for Tuesday July 15th for the greater Chicago
metropolitan area.
A Chicago area "Air Pollution Action Day" is declared when weather
conditions are such that widespread ozone and or particular levels
are expected to be at or above the Unhealthy for Sensitive Groups
(USG) category of the Air Quality Index (AQI) for multiple days.
Ozone is expected to be the primary pollutant of concern.
Active children and adults, especially people with pulmonary or
respiratory disease such as asthma, should limit prolonged outdoor
activity.
Area residents are urged to reduce pollution levels. Air quality
forecasts, current air quality, and tips on how you can reduce your
emissions can be found at www.airnow.gov.
Media contact...Illinois EPA.
https://wxn.io/pkocj
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