Thursday, July 31, 2025

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 311938
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
238 PM CDT Thu Jul 31 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-
238 PM CDT Thu Jul 31 2025 /338 PM EDT Thu Jul 31 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...

Breezy northeast winds will maintain choppy waves and rip
currents leading to a High Swim Risk along Lake Michigan beaches.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday...
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Dangerous swimming conditions will persist through much of Friday
for Lake Michigan beaches.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.


https://wxn.io/oaikl
Posted by at

Air Quality Alert for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

AEUS73 KLOT 311925
AQALOT

Air Quality Alert Message
Relayed by National Weather Service Chicago IL
225 PM CDT Thu Jul 31 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-
Including the cities of Rockford, Belvidere, Crystal Lake,
Algonquin, McHenry, Woodstock, Waukegan, Buffalo Grove, Mundelein,
Gurnee, Rochelle, Oregon, Byron, Dixon, DeKalb, Sycamore, Aurora,
Elgin, Naperville, Wheaton, Downers Grove, Lombard, Carol Stream,
Ottawa, Streator, La Salle, Mendota, Marseilles, Oswego, Yorkville,
Plano, Morris, Coal City, Minooka, Kankakee, Bourbonnais, Bradley,
Pontiac, Dwight, Fairbury, Watseka, Gilman, Paxton, Gibson City,
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
225 PM CDT Thu Jul 31 2025

...AIR QUALITY ALERT IN EFFECT NOW THROUGH FRIDAY NIGHT...

The Illinois Environmental Protection Agency has issued an Air
Pollution Action Day for Friday August 1st for all of Illinois due to
wildfire smoke.

An Illinois "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 for all or almost all of
Illinois.

USG - Active children and adults especially with pulmonary or
respiratory disease such as asthma should limit prolonged outdoor
activity.

Unhealthy - Everyone should reduce prolonged activities or heavy
exertion outdoors.

Area residents are urged to reduce pollution levels. Air quality
forecasts, AQI cautionary statements, current air quality, and tips
on...

https://wxn.io/92l6o
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 311627
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1127 AM CDT Thu Jul 31 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-
1127 AM CDT Thu Jul 31 2025 /1227 PM EDT Thu Jul 31 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...

Breezy northeast winds will maintain choppy waves and rip currents
leading to a High Swim Risk along Lake Michigan beaches.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday...
High Swim Risk Lake Michigan Beaches.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.


https://wxn.io/nzanq
Posted by at

Air Quality Alert for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

AEUS73 KLOT 311526
AQALOT

Air Quality Alert Message
Relayed by National Weather Service Chicago IL
1026 AM CDT Thu Jul 31 2025



Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Northern Cook-Central Cook-Southern Cook-
Northern Will-Southern Will-Eastern Will-
Including the cities of Rockford, Belvidere, Crystal Lake,
Algonquin, McHenry, Woodstock, Waukegan, Buffalo Grove, Mundelein,
Gurnee, Rochelle, Oregon, Byron, Dixon, DeKalb, Sycamore, Aurora,
Elgin, Naperville, Wheaton, Downers Grove, Lombard, Carol Stream,
Ottawa, Streator, La Salle, Mendota, Marseilles, 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
1026 AM CDT Thu Jul 31 2025

...AIR QUALITY ALERT IN EFFECT NOW UNTIL MIDNIGHT CDT TONIGHT...

The Illinois Environmental Protection Agency has issued a Red
Forecast Air Pollution Action Day for Thursday, July 31 for the
AirNow AQI forecast sectors of Rockford, Lake county, Chicago, North
and West Suburbs, South and West Suburbs, Will County, and Aurora-
Elgin.

This Red Forecast Air Pollution Action Day is declared due to a
forecast of Unhealth-Red category for particulates due to wildfire
smoke today, July 31st.

Everyone should reduce prolonged activities or heavy exertion
outdoors. Active children, older adults, and people with pulmonary or
respiratory disease such as asthma should avoid prolonged activities
or heavy exertion outdoors.

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/2mqht
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 310920
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
420 AM CDT Thu Jul 31 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-
420 AM CDT Thu Jul 31 2025 /520 AM EDT Thu Jul 31 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...

Strong northeast winds and high waves on Lake Michigan will
continue to produce hazardous swim conditions.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday...
High Swim Risk Lake Michigan Beaches.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.


https://wxn.io/7hg7v
Posted by at

Wednesday, July 30, 2025

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 301915
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
215 PM CDT Wed Jul 30 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-
215 PM CDT Wed Jul 30 2025 /315 PM EDT Wed Jul 30 2025/

This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

Limited to Elevated Flooding Risk.
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Strengthening northeast winds and building waves on Lake Michigan
will produce hazardous swim conditions starting this evening.

Additional showers and isolated storms are expected this evening
and overnight. Localized torrential rain rates may lead to localized
flooding.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday and Friday...
High Swim Risk Lake Michigan Beaches.
Tuesday...
Limited Thunderstorm Risk.

Hazardous swimming conditions will persist at Lake Michigan
beaches into Friday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated this evening.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east at 25 to 30 mph this afternoon, and then
south at 10 to 15 mph after sunset.


https://wxn.io/5cnyk
Posted by at

Areal Flood Watch Cancellation for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

WGUS63 KLOT 301838
FFALOT

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Chicago IL
138 PM CDT Wed Jul 30 2025


/O.CAN.KLOT.FA.A.0006.000000T0000Z-250731T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La
Salle-Kendall-Northern Cook-Central Cook-Southern Cook-
Including the cities of Oswego, Northbrook, Evanston, Oregon,
Mundelein, Downers Grove, Carol Stream, Plano, Ottawa, Sycamore,
Rockford, Crystal Lake, Aurora, Oak Park, Byron, McHenry, Park
Forest, Chicago, Schaumburg, La Grange, Calumet City, Algonquin,
Dixon, DeKalb, Streator, Marseilles, Lombard, Wheaton, Oak Lawn,
Oak Forest, Elgin, Des Plaines, Naperville, Belvidere, Lemont,
Palatine, Orland Park, Woodstock, Cicero, Gurnee, Rochelle,
Mendota, Waukegan, Yorkville, Buffalo Grove, and La Salle
138 PM CDT Wed Jul 30 2025

...FLOOD WATCH IS CANCELLED...

The Flood Watch is cancelled for Winnebago, Boone, McHenry, Lake,
Ogle, Lee, De Kalb, DuPage, Cook, Kendall, and LaSalle counties in
Illinois. Flooding is no longer expected to be a threat, so the
Flood Watch is being cancelled early.


https://wxn.io/azstx
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 301455
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
955 AM CDT Wed Jul 30 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-
955 AM CDT Wed Jul 30 2025 /1055 AM EDT Wed Jul 30 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 along and southeast of Interstate 55:
Level 1 of 5 Damaging Wind Risk...Up to 60 mph.
Elevated Flooding Risk.
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Showers and storms will move across the area today. A few storms
may be severe mainly southeast of Interstate 55 primarily between
11 AM and 3 PM. Additional showers and storms are possible after
sunset with a threat for localized flooding.

Strengthening northeast winds and building waves on Lake Michigan
will produce hazardous swim conditions from this afternoon through
tonight.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

DISCUSSION...

Thursday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Friday...
High Swim Risk Lake Michigan Beaches.
Tuesday...
Limited Thunderstorm Risk.

Showers and scattered thunderstorms will linger Thursday. Some of
these storms may produce locally heavy rainfall through early
afternoon.

Hazardous swimming conditions will persist at Lake Michigan
beaches into Friday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated today, but any reports of severe
weather would be appreciated.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east at 30 to 40 mph.


https://wxn.io/jpqq6
Posted by at

Areal Flood Watch for McHenry Co., IL until 1:00 PM CDT 7/31

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

WGUS63 KLOT 301431
FFALOT

Flood Watch
National Weather Service Chicago IL
931 AM CDT Wed Jul 30 2025


/O.CON.KLOT.FA.A.0006.250730T1800Z-250731T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-
Including the cities of Oswego, Roselawn, Northbrook, Evanston,
Mundelein, Bourbonnais, Gary, Beecher, Merrillville, Wilmington,
Chicago, Morris, Schaumburg, La Grange, Calumet City, Dixon,
Lombard, Peotone, Valparaiso, Oxford, Bolingbrook, Fowler,
Kankakee, Naperville, Coal City, Cicero, Channahon, Gurnee,
Rochelle, Waukegan, Yorkville, Plano, Sycamore, Rockford, Byron,
Crete, Gilman, Hammond, DeKalb, Streator, Wheaton, Kentland, Oak
Lawn, Bradley, Mendota, Oregon, Carol Stream, Ottawa, DeMotte,
Rensselaer, Aurora, Oak Park, Joliet, Watseka, Algonquin,
Portage, Elgin, Minooka, Dwight, Lemont, Des Plaines, Belvidere,
Buffalo Grove, Fairbury, Downers Grove, Plainfield, Manhattan,
Crystal Lake, Morocco, McHenry, Chesterton, Park Forest, Gibson
City, Marseilles, Pontiac, Mokena, Oak Forest, Paxton, Orland
Park, Palatine, Woodstock, and La Salle
931 AM CDT Wed Jul 30 2025 /1031 AM EDT Wed Jul 30 2025/

...FLOOD WATCH REMAINS IN EFFECT FROM 1 PM CDT /2 PM EDT/ THIS
AFTERNOON THROUGH THURSDAY AFTERNOON...

* WHAT...Flooding caused by torrential rainfall is possible.

* WHERE...Winnebago, Boone, McHenry, Lake, Lee, Ogle, De Kalb,
DuPage, Cook, La Salle, Kendall, Grundy, Will, Livingston,
Kankakee, Ford, and Iroquois counties in northern Illinois, and
Benton, Jasper, Lake IN, Newton and Porter counties in
northwestern Indiana.

* WHEN...From 1 PM CDT /2 PM EDT/ this afternoon through Thursday
afternoon.

* IMPACTS...Creeks and streams may rise out of their banks, and...

https://wxn.io/sbbln
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 300958
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
458 AM CDT Wed Jul 30 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-
458 AM CDT Wed Jul 30 2025 /558 AM EDT Wed Jul 30 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 1 of 5 Damaging Wind Risk...up to 60 mph.
Elevated Flooding Risk.
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Several rounds of thunderstorms will affect the area from this
morning through tonight. A few storms today may be severe, capable
of producing isolated damaging wind gusts. These storms will also
likely produce torrential downpours which may lead to localized
flash flooding, especially if repeated rounds of storms track
across the same area. Periods of heavy rain are possible tonight.

Strengthening northeast winds and building waves on Lake Michigan
will produce hazardous swim conditions from this afternoon through
tonight.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Friday...
High Swim Risk Lake Michigan Beaches.
Tuesday...
Limited Thunderstorm Risk.

DISCUSSION...

Showers and scattered thunderstorms will linger Thursday, but will
gradually diminish from north to south through the day. Some of these
storms may produce locally heavy rainfall through early afternoon.

Hazardous swimming conditions will persist at Lake Michigan beaches
into Friday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is n...

https://wxn.io/u42ey
Posted by at

Areal Flood Watch for McHenry Co., IL until 1:00 PM CDT 7/31

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

WGUS63 KLOT 300818
FFALOT

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Chicago IL
318 AM CDT Wed Jul 30 2025


/O.NEW.KLOT.FA.A.0006.250730T1800Z-250731T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-
Including the cities of Marseilles, Calumet City, Gary, Byron,
Rochelle, Naperville, Palatine, Oak Lawn, Buffalo Grove,
Fairbury, Fowler, Crete, Carol Stream, DeMotte, Watseka,
Kankakee, Park Forest, Minooka, Rockford, Evanston, Gibson City,
Belvidere, Wheaton, La Salle, Paxton, Oak Park, Joliet, La
Grange, Dwight, Coal City, Morocco, Streator, Downers Grove,
Beecher, Schaumburg, Oswego, Waukegan, Yorkville, Mendota, Dixon,
Hammond, Northbrook, Rensselaer, Bourbonnais, Oregon, Lombard,
McHenry, Cicero, Peotone, Pontiac, Roselawn, Sycamore, Oak
Forest, Bradley, Merrillville, Chicago, Woodstock, Elgin, Mokena,
DeKalb, Gurnee, Kentland, Orland Park, Gilman, Des Plaines,
Aurora, Morris, Chesterton, Plano, Ottawa, Valparaiso, Channahon,
Bolingbrook, Portage, Oxford, Lemont, Crystal Lake, Mundelein,
Algonquin, Plainfield, Manhattan, and Wilmington
318 AM CDT Wed Jul 30 2025 /418 AM EDT Wed Jul 30 2025/

...FLOOD WATCH IN EFFECT FROM 1 PM CDT /2 PM EDT/ THIS AFTERNOON
THROUGH THURSDAY AFTERNOON...

* WHAT...Flooding caused by excessive rainfall is possible.

* WHERE...Portions of Illinois, including the following areas,
Boone, Central Cook, De Kalb, DuPage, Eastern Will, Ford, Grundy,
Iroquois, Kane, Kankakee, Kendall, La Salle, Lake IL, Lee,
Livingston, McHenry, Northern Cook, Northern Will, Ogle, Southern
Cook, Southern Will and Winnebago and northwest Indiana, including
the following areas, Benton, Jasper, Lake IN, Newton and...

https://wxn.io/x3jvk
Posted by at

Tuesday, July 29, 2025

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 300144
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
844 PM CDT Tue Jul 29 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-
844 PM CDT Tue Jul 29 2025 /944 PM EDT Tue Jul 29 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 toward sunrise.

DISCUSSION...

Thunderstorms with gusty winds may approach northwest
Illinois late tonight, though likely to remain
west of the area until the daytime hours Wednesday.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Thursday...
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Friday...
High Swim Risk Lake Michigan Beaches.
Monday...
Limited Thunderstorm Risk.

DISCUSSION...

Periods of thunderstorms are likely Wednesday through Thursday
morning. Some of these storms Wednesday could be strong to severe
and also produce torrential rain which may lead to localized
flash flooding. Periods of heavy rain are possible Wednesday
night.

High waves and dangerous swimming conditions are expected
Wednesday afternoon through Friday afternoon at Lake Michigan
beaches.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east-southeast at 30 to 40 mph.


https://wxn.io/1upfb
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 291956
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
256 PM CDT Tue Jul 29 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-
256 PM CDT Tue Jul 29 2025 /356 PM EDT Tue Jul 29 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...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph.

DISCUSSION...

An isolated thunderstorm cannot be ruled out along the Illinois
lakeshore late this afternoon.

Thunderstorms with gusty winds may approach north central
Illinois as early as sunrise Wednesday, though likely will remain
west of the area until the daytime hours Wednesday.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Thursday...
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Friday...
High Swim Risk Lake Michigan Beaches.
Monday...
Limited Thunderstorm Risk.

DISCUSSION...

Periods of thunderstorms are likely Wednesday through Thursday
morning. Some of these storms Wednesday could be strong to severe
and also produce torrential rain which may lead to localized
flash flooding. Periods of heavy rain are possible Wednesday night.

High waves and dangerous swimming conditions are expected
Wednesday afternoon through Friday afternoon at Lake Michigan
beaches.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

GENERAL STORM MOTION OF THE DAY:

Moving toward the...

https://wxn.io/ednup
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 291748
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1248 PM CDT Tue Jul 29 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-
1248 PM CDT Tue Jul 29 2025 /148 PM EDT Tue Jul 29 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 late tonight...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph.
Limited Excessive Heat Risk.

DISCUSSION...

An isolated storm cannot be ruled out along the Illinois
lakeshore this afternoon.

Additional thunderstorms with gusty winds may approach north
central Illinois toward sunrise Wednesday.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
Elevated Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Thursday...
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Periods of thunderstorms are likely Wednesday through Thursday
morning. Some of these storms Wednesday could be strong to severe
and also produce torrential rain which may lead to localized flash
flooding.

High waves and dangerous swimming conditions are likely Wednesday
into Friday at Lake Michigan beaches.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

GENERAL STORM MOTION OF THE DAY:

Moving toward the south-southeast at 20 mph this afternoon.
Moving toward the east-southeast at 30 to 40 mph toward sunrise.


https://wxn.io/b1plw
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 290928
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
428 AM CDT Tue Jul 29 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-
428 AM CDT Tue Jul 29 2025 /528 AM EDT Tue Jul 29 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.
Limited Flooding Risk.
Limited Excessive Heat Risk.

DISCUSSION...

A decaying complex of thunderstorms is moving into western
Illinois early this morning, with storms expected mainly along and
west of the I-39 corridor. Additional isolated to widely
scattered thunderstorms are possible later this afternoon and
evening, mainly northwest of I-88. While not expected to be
widespread, an isolated damaging wind gust can't be ruled out with
these storms. Some of these storms may also produce brief
torrential downpours which could lead to minor localized flooding.

Additional thunderstorms may approach north central Illinois
again toward sunrise Wednesday.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
Elevated Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Thursday...
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Periods of thunderstorms are likely Wednesday through Thursday
morning. Some of these storms Wednesday could be strong to severe
and also produce torrential rain which may lead to localized flash
flooding.

High waves and dangerous swimming c...

https://wxn.io/ym0ym
Posted by at

Monday, July 28, 2025

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 290132
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
832 PM CDT Mon Jul 28 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-
832 PM CDT Mon Jul 28 2025 /932 PM EDT Mon Jul 28 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.
Limited Flooding Risk.

DISCUSSION...

A strong thunderstorm complex is expected to approach the
area late tonight. This thunderstorm complex may be in a
decaying mode as it arrives, but there is the potential for
damaging wind gusts across northwest Illinois toward sunrise.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
Limited Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Limited Excessive Heat Risk.
Wednesday...
Elevated Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Thursday...
Limited Thunderstorm Risk In The Morning.
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Periods of thunderstorms are possible Tuesday through Wednesday,
some of which could be strong to severe and also produce
torrential rain which may lead to localized flash flooding.

High waves and dangerous swimming conditions are possible
Wednesday through Thursday at Lake Michigan beaches.

.SPOTTER INFORMATION STATEMENT...

Spotters activation is not expected at this time.

GENERAL STORM MOTION OF THE DAY:

Moving toward the southeast at 35 to 40 mph.


https://wxn.io/giwnv
Posted by at

Heat Advisory Expiration for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

WWUS73 KLOT 290039
NPWLOT

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
739 PM CDT Mon Jul 28 2025


/O.EXP.KLOT.HT.Y.0003.000000T0000Z-250729T0100Z/
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-
Including the cities of Yorkville, Woodstock, Plainfield,
Marseilles, Beecher, Coal City, Oak Park, Wilmington, Des
Plaines, Merrillville, Gibson City, Chicago, Algonquin,
Manhattan, Fairbury, Roselawn, Mendota, Joliet, Oregon,
Mundelein, DeMotte, Chesterton, La Salle, Bradley, Rochelle,
Rensselaer, Bolingbrook, Gary, Downers Grove, Bourbonnais, Crete,
Schaumburg, Fowler, Dwight, Streator, Gurnee, Aurora, Oak Lawn,
Waukegan, Buffalo Grove, Gilman, Belvidere, Minooka, Morris,
Kankakee, Plano, Dixon, Oswego, Channahon, Orland Park, Paxton,
Oxford, Pontiac, Elgin, Northbrook, Carol Stream, Portage,
McHenry, Palatine, Lemont, Mokena, Peotone, Oak Forest, Park
Forest, Naperville, Valparaiso, Hammond, Wheaton, Rockford,
Kentland, DeKalb, Lombard, La Grange, Calumet City, Ottawa,
Watseka, Sycamore, Byron, Crystal Lake, Cicero, Morocco, and
Evanston
739 PM CDT Mon Jul 28 2025 /839 PM EDT Mon Jul 28 2025/

...HEAT ADVISORY WILL EXPIRE AT 8 PM CDT /9 PM EDT/ THIS EVENING...

Heat index values are diminishing this evening, allowing the
advisory to expire.


https://wxn.io/nc99i
Posted by at

Heat Advisory for McHenry Co., IL until 8:00 PM CDT 7/28

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

WWUS73 KLOT 282007
NPWLOT

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
307 PM CDT Mon Jul 28 2025


/O.CON.KLOT.HT.Y.0003.000000T0000Z-250729T0100Z/
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-
Including the cities of Gary, Mokena, Wilmington, DeMotte,
Oregon, Aurora, Dixon, Yorkville, Belvidere, Watseka, Schaumburg,
Marseilles, Byron, Oak Lawn, Park Forest, Crete, Mundelein, Oak
Park, Cicero, Des Plaines, Morocco, Fairbury, Gilman, Northbrook,
Kentland, Fowler, McHenry, Gurnee, Mendota, Oak Forest, Lemont,
Downers Grove, Joliet, Evanston, Beecher, Algonquin, Paxton,
Wheaton, Valparaiso, Plainfield, Crystal Lake, Naperville,
Morris, Coal City, Plano, Dwight, Chicago, Merrillville, Calumet
City, Lombard, Minooka, Roselawn, Oxford, Buffalo Grove, La
Grange, Portage, Sycamore, Rockford, Chesterton, Rensselaer,
Gibson City, Rochelle, Bolingbrook, La Salle, Hammond, Orland
Park, Peotone, Oswego, Bourbonnais, Ottawa, Streator, Kankakee,
Channahon, Elgin, Woodstock, Waukegan, Bradley, Manhattan,
Pontiac, Carol Stream, Palatine, and DeKalb
307 PM CDT Mon Jul 28 2025 /407 PM EDT Mon Jul 28 2025/

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT /9 PM EDT/ THIS
EVENING...

* WHAT...Heat index values up to 105.

* WHERE...Portions of central, east central, north central, and
northeast Illinois and northwest Indiana.

* WHEN...Until 8 PM CDT /9 PM EDT/ 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/ndzju
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 282000
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
300 PM CDT Mon Jul 28 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 Mon Jul 28 2025 /400 PM EDT Mon Jul 28 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.
Limited Flooding Risk.
Elevated Excessive Heat Risk through early this evening.

DISCUSSION...

Isolated thunderstorms with gusty winds will be possible
through early evening.

Hot and humid weather conditions are expected with afternoon
peak heat indices around 105 degrees.

Another strong thunderstorm complex is expected to approach the
area late tonight. While this thunderstorm complex may be in a
decaying mode as it arrives, there is some potential for damaging
wind gusts across northwest Illinois toward sunrise.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
Limited Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Limited Excessive Heat Risk.
Wednesday...
Elevated Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Thursday...
Limited Thunderstorm Risk In The Morning.
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Periods of thunderstorms are possible Tuesday through Wednesday,
some of which could be strong to severe and also produce
torrential rain which may lead to localized flash flooding.

High waves and dangerous swimming ...

https://wxn.io/c6j6p
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 281819
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
119 PM CDT Mon Jul 28 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-
119 PM CDT Mon Jul 28 2025 /219 PM EDT Mon Jul 28 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.
Limited Flooding Risk.
Elevated Excessive Heat Risk.

DISCUSSION...

Isolated thunderstorms with gusty winds will persist across
portions of northeast Illinois and northwest Indiana through the
afternoon.

Hot and humid weather conditions are expected, with afternoon
peak heat indices of 105 to 109 degrees. Lingering effects of
storms and a lake breeze near Lake Michigan may limit the effects
of the heat in some spots.

Another strong thunderstorm complex is expected to approach the
area late tonight. While this thunderstorm complex may be in a
decaying mode as it arrives, there is some potential for damaging
wind gusts across northwest Illinois toward sunrise.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
Elevated Excessive Heat Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Limited Flooding Risk.

Wednesday...
High Swim Risk Lake Michigan Beaches.
Elevated Flooding Risk.
Limited Thunderstorm Risk.

Thursday...
High Swim Risk Lake Michigan Beaches.
Limited Thunderstorm Risk mainly south of U.S. 24.


DISCUSSION...

Dangerous heat and humidity are possible again Tuesday, but there
is some uncertainty due to potential i...

https://wxn.io/j3nep
Posted by at

Heat Advisory for McHenry Co., IL until 8:00 PM CDT 7/28

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

WWUS73 KLOT 281532
NPWLOT

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
1032 AM CDT Mon Jul 28 2025


/O.CON.KLOT.HT.Y.0003.250728T1700Z-250729T0100Z/
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-
Including the cities of Portage, Orland Park, Oswego, Marseilles,
Fowler, Buffalo Grove, Gilman, Bolingbrook, Naperville, Lemont,
Dixon, Wheaton, Fairbury, Dwight, Gary, Ottawa, Kentland, Crystal
Lake, La Grange, Kankakee, Mokena, Park Forest, Plainfield,
Chesterton, Bourbonnais, Oak Forest, Manhattan, Woodstock,
Chicago, Joliet, Lombard, Crete, McHenry, Evanston, Minooka,
Streator, Carol Stream, Des Plaines, Oak Lawn, Gibson City,
Algonquin, Northbrook, Pontiac, Wilmington, Morris, DeKalb,
Gurnee, Peotone, Calumet City, Oregon, La Salle, Yorkville,
Waukegan, Rochelle, Palatine, Rensselaer, Elgin, Rockford, Plano,
Aurora, Cicero, Downers Grove, Oxford, Mundelein, Hammond,
Schaumburg, Roselawn, Byron, Mendota, Channahon, Sycamore,
DeMotte, Beecher, Watseka, Paxton, Merrillville, Bradley, Oak
Park, Belvidere, Valparaiso, Morocco, and Coal City
1032 AM CDT Mon Jul 28 2025 /1132 AM EDT Mon Jul 28 2025/

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT /9 PM EDT/ THIS
EVENING...

* WHAT...Heat index values up to 105 to 109 expected.

* WHERE...Portions of central, east central, north central, and
northeast Illinois and northwest Indiana.

* WHEN...Until 8 PM CDT /9 PM EDT/ 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/t73jo
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 280927
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
427 AM CDT Mon Jul 28 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-
427 AM CDT Mon Jul 28 2025 /527 AM EDT Mon Jul 28 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.
Limited Flooding Risk.
Elevated Excessive Heat Risk.

DISCUSSION...

Scattered thunderstorms will spread across parts of northern
Illinois early this morning. Some of these storms will produce
locally torrential downpours and localized wind gusts up to 40 mph
early, before dissipating by late morning.

Hot and humid weather conditions are expected, with afternoon
peak heat indices of 105 to 109 degrees. Lingering effects of
morning storms and an afternoon lake breeze near Lake Michigan may
limit the effects of the heat in some spots.

Another strong thunderstorm complex is expected to approach the
area late tonight. While this thunderstorm complex may be in a
decaying mode as it arrives, there is some potential for damaging
wind gusts across northwest Illinois toward sunrise.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
Elevated Excessive Heat Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Limited Flooding Risk.

Wednesday...
High Swim Risk Lake Michigan Beaches.
Elevated Flooding Risk.
Limited Thunderstorm Risk.

Thursday...
High Swim Risk Lake Michigan Beaches.
Limited Thunderstorm Risk mainly south of U.S. 24.


DI...

https://wxn.io/4kr29
Posted by at

Heat Advisory for McHenry Co., IL until 8:00 PM CDT 7/28

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

WWUS73 KLOT 280856
NPWLOT

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
356 AM CDT Mon Jul 28 2025


/O.CON.KLOT.HT.Y.0003.250728T1700Z-250729T0100Z/
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-
Including the cities of Chicago, Plano, Byron, Wheaton, Fowler,
Aurora, Buffalo Grove, Algonquin, Evanston, Morris, Cicero,
Belvidere, Gibson City, Gilman, Paxton, Naperville, Beecher,
Watseka, Mendota, Gurnee, Oak Forest, Mokena, Streator, Hammond,
Lemont, Valparaiso, Chesterton, Plainfield, Crystal Lake, Oswego,
Rensselaer, Woodstock, McHenry, Rochelle, Dwight, Pontiac,
Oregon, Calumet City, Peotone, Elgin, Dixon, Palatine, Manhattan,
Oxford, Sycamore, Bourbonnais, Schaumburg, Park Forest, DeMotte,
Morocco, Rockford, Carol Stream, Orland Park, Crete, Roselawn,
Gary, Joliet, Bradley, Northbrook, DeKalb, Waukegan, Yorkville,
La Salle, Minooka, Mundelein, Oak Park, Downers Grove, Ottawa,
Oak Lawn, Channahon, Merrillville, Portage, La Grange,
Bolingbrook, Coal City, Marseilles, Wilmington, Lombard,
Kankakee, Fairbury, Kentland, and Des Plaines
356 AM CDT Mon Jul 28 2025 /456 AM EDT Mon Jul 28 2025/

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON CDT /1 PM EDT/ TODAY TO
8 PM CDT /9 PM EDT/ THIS EVENING...

* WHAT...Heat index values up to 105 to 109 expected.

* WHERE...Portions of central, east central, north central, and
northeast Illinois and northwest Indiana.

* WHEN...From noon CDT /1 PM EDT/ today to 8 PM CDT /9 PM EDT/ 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/ywtzu
Posted by at

Sunday, July 27, 2025

Heat Advisory for McHenry Co., IL until 8:00 PM CDT 7/28

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

WWUS73 KLOT 280226
NPWLOT

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
926 PM CDT Sun Jul 27 2025


/O.CON.KLOT.HT.Y.0003.250728T1700Z-250729T0100Z/
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-
Including the cities of Crete, Elgin, Byron, Park Forest,
Fairbury, McHenry, Wilmington, Plano, Rensselaer, Oregon, Orland
Park, Mokena, Waukegan, Pontiac, Gurnee, Buffalo Grove,
Plainfield, Naperville, Cicero, Mundelein, La Salle, Peotone,
Merrillville, Schaumburg, Dixon, Northbrook, Crystal Lake,
Rockford, Morris, Beecher, Joliet, Watseka, Bolingbrook, Oak
Lawn, Paxton, Palatine, Carol Stream, Bourbonnais, Roselawn,
Downers Grove, Fowler, Rochelle, Woodstock, Kankakee, Mendota,
Sycamore, Morocco, Chicago, Belvidere, Oswego, Oak Forest,
Ottawa, Calumet City, Algonquin, Manhattan, Gibson City,
Yorkville, DeKalb, Dwight, Hammond, Lombard, Minooka, Lemont, Des
Plaines, Oak Park, Kentland, Bradley, Aurora, Marseilles, La
Grange, Wheaton, Evanston, Channahon, Portage, Streator, Gilman,
Gary, DeMotte, Oxford, Chesterton, Coal City, and Valparaiso
926 PM CDT Sun Jul 27 2025 /1026 PM EDT Sun Jul 27 2025/

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON CDT /1 PM EDT/ TO 8 PM
CDT /9 PM EDT/ MONDAY...

* WHAT...Heat index values up to 105 to 109 expected.

* WHERE...Portions of central, east central, north central, and
northeast Illinois and northwest Indiana.

* WHEN...From noon CDT /1 PM EDT/ to 8 PM CDT /9 PM EDT/ Monday.

* 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/vuu9b
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 280209 AAA
HWOLOT

Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
909 PM CDT Sun Jul 27 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-
909 PM CDT Sun Jul 27 2025 /1009 PM EDT Sun Jul 27 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.
Limited Flooding Risk.

DISCUSSION...

Isolated thunderstorms can't be ruled out in the late evening and
early overnight hours, mainly south of I-80. Main hazards would
include localized downpours and a few lightning strikes.

A decaying thunderstorm complex may move into northwest Illinois
early Monday morning and be capable of strong to locally damaging
wind gusts, mainly near and west of Interstate 39.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday and Tuesday...
Elevated Excessive Heat Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Limited Flooding Risk.
Wednesday...
High Swim Risk Lake Michigan Beaches.
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Thursday...
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Dangerous heat and humidity are expected Monday and Tuesday, but
some uncertainty remains due to potential impacts from morning
storms each day.

Periods of thunderstorms are possible Monday through Wednesday.
Some of which could be strong to severe and also produce
torrential rain which may lead to localized flash flooding.

High waves and dangerous swimming conditions are possible
Wednesday through Thursda...

https://wxn.io/l5cli
Posted by at

Areal Flood Advisory Cancellation for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

WGUS83 KLOT 272330
FLSLOT

Flood Advisory
National Weather Service Chicago IL
630 PM CDT Sun Jul 27 2025


/O.CAN.KLOT.FA.Y.0047.000000T0000Z-250728T0045Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
McHenry IL-
630 PM CDT Sun Jul 27 2025

...FLOOD ADVISORY IS CANCELLED...

The Flood Advisory is cancelled for a portion of northeast Illinois,
including the following area, McHenry.

Flooding is no longer expected to pose a threat.

&&

LAT...LON 4215 8849 4215 8828 4207 8824 4207 8826
4211 8836 4191 8829 4194 8814 4184 8806
4178 8837



https://wxn.io/j0a6u
Posted by at

Areal Flood Advisory for McHenry Co., IL until 7:45 PM CDT 7/27

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

WGUS83 KLOT 272243
FLSLOT

Flood Advisory
National Weather Service Chicago IL
543 PM CDT Sun Jul 27 2025


/O.NEW.KLOT.FA.Y.0047.250727T2243Z-250728T0045Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DuPage IL-Kane IL-McHenry IL-
543 PM CDT Sun Jul 27 2025

...FLOOD ADVISORY IN EFFECT UNTIL 745 PM CDT THIS EVENING...

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...A portion of northeast Illinois, including the following
counties, DuPage, Kane and McHenry.

* WHEN...Until 745 PM CDT.

* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Underpasses may be
flooded. Roads and streets may be flooded.

* ADDITIONAL DETAILS...
- At 542 PM CDT, Doppler radar and automated rain gauges
indicated nearly stationary thunderstorms along a line from
near Huntley to West Chicago. Between 1 and 3 inches of rain
has fallen based on radar and automated gauges.
- Additional rainfall amounts of 1 to 3 inches are expected
over the area. This additional rain will result in minor
flooding.
- Some locations that will experience flooding include...
Elgin, Wheaton, Crystal Lake, Carol Stream, Hanover Park,
Carpentersville, St. Charles, Algonquin, Lake in the Hills,
Glen Ellyn, West Chicago, Batavia, Huntley, Geneva, Campton
Hills, South Elgin, North Aurora and Warrenville.
- http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Advisory means minor flooding along waterways and other poor
drainage areas is imminent or may already be occurring. Persons in
the advisory area should use caution and avoid flood waters.

&&

LAT...LON 4223 8852 4225 8844 4224 8833 4207 8824
4207 8826 4211 8836 4191 8829 4194 8814
4184 8806 4178 8837 4215 8849



https://wxn.io/nc8t6
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 272018
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
318 PM CDT Sun Jul 27 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 Sun Jul 27 2025 /418 PM EDT Sun Jul 27 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 Mainly Tonight...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph.
Limited Flooding Risk.
Limited Excessive Heat Risk this afternoon.

DISCUSSION...

A few storms are possible this afternoon. Brief downpours and a
few lightning strikes are the main threats. Hot and humid
conditions will continue with heat indices near 100 degrees away
from the lake.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday and Tuesday...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Elevated Excessive Heat Risk.
Limited Flooding Risk.
Wednesday...
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Elevated Flooding Risk.
Thursday...
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

A thunderstorm complex may develop into the region late tonight
and early Monday morning. A few storms could produce strong to
locally damaging wind gusts.

Dangerous heat and humidity is expected area-wide on Monday. These
conditions will continue on Tuesday, but some uncertainty
regarding impacts potential morning storms remains.

Periods of thunderstorms are possible Tuesday through Wednesday.
Some of these thunderstorms could be strong to severe and may
also produce torrential rain which may lead to localized flash
flooding.

...

https://wxn.io/zwmwf
Posted by at

Heat Advisory for McHenry Co., IL until 8:00 PM CDT 7/28

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

WWUS73 KLOT 271827
NPWLOT

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
127 PM CDT Sun Jul 27 2025


/O.NEW.KLOT.HT.Y.0003.250728T1700Z-250729T0100Z/
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-
Including the cities of Sycamore, Evanston, Watseka, Crystal
Lake, Kankakee, Valparaiso, La Salle, Bourbonnais, Gibson City,
Mokena, Pontiac, Coal City, Carol Stream, Oak Lawn, Northbrook,
Plano, Gilman, DeMotte, La Grange, Lombard, Woodstock, Waukegan,
McHenry, Naperville, Fowler, Streator, Gary, Portage, Joliet,
Wheaton, Ottawa, Peotone, Oak Forest, Cicero, Buffalo Grove,
Manhattan, Marseilles, Rochelle, Mendota, Oak Park, Belvidere,
Des Plaines, Chicago, Oregon, Yorkville, Roselawn, Crete,
Bolingbrook, Byron, Rensselaer, DeKalb, Gurnee, Elgin, Palatine,
Bradley, Dixon, Aurora, Schaumburg, Channahon, Park Forest,
Wilmington, Kentland, Oswego, Chesterton, Paxton, Morris, Orland
Park, Dwight, Oxford, Rockford, Minooka, Beecher, Hammond,
Merrillville, Mundelein, Plainfield, Lemont, Downers Grove,
Algonquin, Morocco, Fairbury, and Calumet City
127 PM CDT Sun Jul 27 2025 /227 PM EDT Sun Jul 27 2025/

...HEAT ADVISORY IN EFFECT FROM NOON CDT /1 PM EDT/ TO 8 PM CDT /9
PM EDT/ MONDAY...

* WHAT...Heat index values 105 to 109 expected.

* WHERE...Portions of central, east central, north central, and
northeast Illinois and northwest Indiana.

* WHEN...From noon CDT /1 PM EDT/ to 8 PM CDT /9 PM EDT/ Monday.

* 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/6m6fm
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 271522
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1022 AM CDT Sun Jul 27 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 Sun Jul 27 2025 /1122 AM EDT Sun Jul 27 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...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph.
Limited Excessive Heat Risk.

DISCUSSION...

There is a chance of thunderstorms south of Interstate 80 through
early this evening. No severe weather is expected.

There is another chance for thunderstorms late tonight into Monday
morning mainly west of the Fox Valley. Storms tonight could be
strong to severe with damaging winds up to 60 mph.

Hot and humid conditions are expected today which will result in
afternoon heat indices around 100 degrees.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday...
Limited Thunderstorm Risk In The Morning.
Elevated Excessive Heat Risk.
Tuesday...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Elevated Excessive Heat Risk.
Limited Flooding Risk.
Wednesday...
Limited Thunderstorm Risk.
Elevated Flooding Risk.
High Swim Risk Lake Michigan Beaches.
Thursday...
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Dangerous heat and humidity is possible Monday and maybe again on
Tuesday.

There is a chance of thunderstorms Monday morning. Some of these
storms could be strong to severe especially across northwest
Illinois.

Periods of thunderstorms are possible Tuesday through Wednesday.
Some of...

https://wxn.io/p3d74
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 270950
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
450 AM CDT Sun Jul 27 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-
450 AM CDT Sun Jul 27 2025 /550 AM EDT Sun Jul 27 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 Tonight...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph.
Limited Excessive Heat Risk.
Limited Fog Risk early in the morning.

DISCUSSION...

Scattered showers and thunderstorms will persist along and south
of I-80 through the morning. There is another chance for
thunderstorms late tonight into Monday morning mainly west of the
Fox Valley. Storms tonight could be strong to severe with damaging
winds up to 60 mph.

Warm and humid conditions are expected today which will result in
afternoon heat indices between 95 and 100 degrees.

Patchy fog, some locally dense, will persist through 8 AM this
morning.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday...
Elevated Excessive Heat Risk.
Limited Thunderstorm Risk in the morning.
Tuesday...
Elevated Excessive Heat Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Limited Flooding Risk.
Wednesday...
High Swim Risk Lake Michigan Beaches.
Elevated Flooding Risk.
Limited Thunderstorm Risk.
Thursday...
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Dangerous heat and humidity is possible Monday and maybe again on
Tuesday.

There is a chance of thunderstorms Monday morning. Some of these
storms could be strong to severe especially across nor...

https://wxn.io/tnj9j
Posted by at

Saturday, July 26, 2025

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 270206 AAA
HWOLOT

Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
906 PM CDT Sat Jul 26 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-
906 PM CDT Sat Jul 26 2025 /1006 PM EDT Sat Jul 26 2025/

This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

Elevated Flooding Risk.
Limited Thunderstorm Risk.
Limited Fog Risk.

DISCUSSION...

Scattered showers and thunderstorms may continue overnight,
mainly near and south of Interstate 80. The strongest storms will
be capable of producing gusty wind gusts and torrential rainfall
which may lead to localized flash flooding.

Areas of fog are expected across interior northern Illinois late
tonight.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk late Sunday Night.
Limited Excessive Heat Risk.
Limited Fog Risk early in the morning.
Monday...
Elevated Excessive Heat Risk.
Limited Thunderstorm Risk.
Tuesday...
Elevated Excessive Heat Risk.
Limited Flooding Risk.
Limited Thunderstorm Risk.
Wednesday...
High Swim Risk Lake Michigan Beaches.
Limited Flooding Risk.
Limited Thunderstorm Risk.
Thursday...
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Dangerous heat and humidity is possible Monday.

There is a chance of thunderstorms Monday morning. Some of these
storms could be strong to severe especially across northwest
Illinois.

Periods of thunderstorms are possible Tuesday through Wednesday.
Some of these thunderstorms could be strong to severe and may
also produce torrential rain ...

https://wxn.io/fp8lv
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 262008
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
308 PM CDT Sat Jul 26 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 Sat Jul 26 2025 /408 PM EDT Sat Jul 26 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 1 of 5 Damaging Wind Risk...up to 60 mph.
Limited Flooding Risk.
Limited Fog Risk.

DISCUSSION...

Scattered thunderstorms are expected through this evening, mainly
south of Interstate 80. The strongest storms will be capable of
producing damaging wind gusts. A tornado or two will also possible.

Torrential rain will also accompany these thunderstorms, leading
to possible localized flash flooding, mainly for areas south of
Interstate 80.

Areas of fog are expected across northern and northwest Illinois
late tonight.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk late Sunday Night.
Limited Excessive Heat Risk.
Limited Fog Risk early in the morning.
Monday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Tuesday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Wednesday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Thursday...
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Dangerous heat and humidity is possible Monday.

There is a chance of thunderstorms Monday morning. Some of these
storms could be strong to ...

https://wxn.io/qkcrw
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 261729
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1229 PM CDT Sat Jul 26 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-
1229 PM CDT Sat Jul 26 2025 /129 PM EDT Sat Jul 26 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 1 of 5 Damaging Wind Risk...up to 60 mph.
Elevated Flooding Risk.

DISCUSSION...

Scattered thunderstorms are expected through this evening, mainly
along and south of Interstate 80. The strongest storms will be
capable of producing damaging wind gusts. A tornado or two will
also possible.

Torrential rain will also accompany these thunderstorms, leading
to localized flash flooding.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Monday...
Significant Excessive Heat Risk.
Tuesday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Wednesday...
Limited Thunderstorm Risk.

DISCUSSION...

Heat and humidity may once again build to dangerous levels at
times Sunday through Tuesday with the hottest conditions expected
on Monday.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed this afternoon into this evening.

GENERAL STORM MOTION OF THE DAY:

Moving toward the northeast at 30 mph.


https://wxn.io/or1rs
Posted by at

Areal Flood Watch Cancellation for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

WGUS63 KLOT 260922
FFALOT

Flood Watch
National Weather Service Chicago IL
422 AM CDT Sat Jul 26 2025


/O.CAN.KLOT.FA.A.0005.000000T0000Z-250727T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Lake IL-
Including the cities of Mundelein, McHenry, Algonquin, Crystal
Lake, Belvidere, Gurnee, Buffalo Grove, Rockford, Waukegan, and
Woodstock
422 AM CDT Sat Jul 26 2025

...FLOOD WATCH IS CANCELLED...

The Flash Flood Watch is cancelled for portions of north central and
northeast Illinois, including the following areas, in north central
Illinois, Boone and Winnebago. In northeast Illinois, Lake IL and
McHenry.

The flash flooding threat is higher to the south of this area. Brief
heavy rainfall does remain possible today. Therefore, the Flash
Flood Watch is being cancelled.


https://wxn.io/xxf9r
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 260825
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
325 AM CDT Sat Jul 26 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-
325 AM CDT Sat Jul 26 2025 /425 AM EDT Sat Jul 26 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 Thunderstorm Risk...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph
Elevated Flooding Risk.

DISCUSSION...

Periods of heavy rain producing showers and storms are expected
overnight which may lead to torrential rainfall and flash
flooding, especially mid morning into the afternoon. There is
also a threat for a few strong to severe storms in the afternoon,
mainly south of I-88.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday...
Limited Thunderstorm Risk...
Elevated Excessive Heat Risk.
Monday...
Significant Excessive Heat Risk.
Tuesday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Wednesday...
Limited Thunderstorm Risk.

DISCUSSION...

Heat and humidity may once again build to dangerous levels at
times Sunday through Tuesday with the hottest conditions expected
on Monday.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed later this morning into the afternoon.

GENERAL STORM MOTION OF THE DAY:

Moving toward the northeast at 30 mph.


https://wxn.io/05w0q
Posted by at

Friday, July 25, 2025

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 260233 AAA
HWOLOT

Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
933 PM 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-
933 PM CDT Fri Jul 25 2025 /1033 PM EDT Fri Jul 25 2025/

This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

Elevated Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph.

DISCUSSION...

Periods of heavy rain producing showers and storms are expected
overnight which may lead to flash flooding. The strongest storms
will also be capable of producing gusty winds.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday...
Elevated Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Sunday...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday...
Elevated Excessive Heat Risk.
Tuesday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Elevated Excessive Heat Risk.
Wednesday...
Limited Thunderstorm Risk.

DISCUSSION...

Lingering thunderstorms Saturday will bring the chance for
torrential rainfall and localized flooding. There is also a
threat for a few strong to severe storms in the afternoon, mainly
south of I-88.

Heat and humidity may once again build to dangerous levels at
times Sunday through Tuesday with the hottest conditions expected
on Monday.

.SPOTTER INFORMATION STATEMENT...

Given the limited nature of any severe threat, spotter activation
is not expected, but reports of flooding or ...

https://wxn.io/6d13q
Posted by at

Areal Flood Watch for McHenry Co., IL until 7:00 PM CDT 7/26

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

WGUS63 KLOT 252230
FFALOT

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Chicago IL
530 PM CDT Fri Jul 25 2025


/O.EXB.KLOT.FA.A.0005.000000T0000Z-250727T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-La Salle-
Including the cities of Gurnee, Dixon, Waukegan, Crystal Lake,
Belvidere, Buffalo Grove, Ottawa, Rockford, Mundelein, Streator,
Rochelle, Marseilles, Mendota, Byron, La Salle, Woodstock,
Oregon, DeKalb, Algonquin, McHenry, and Sycamore
530 PM CDT Fri Jul 25 2025

...FLOOD WATCH IN EFFECT THROUGH SATURDAY EVENING...

* WHAT...Flash flooding caused by excessive rainfall due to repeated
rounds of torrential rain-producing thunderstorms is possible.

* WHERE...Boone, De Kalb, La Salle, Lee, Ogle, Winnebago, Lake IL
and McHenry counties in Illinois.

* WHEN...Through Saturday evening.

* IMPACTS...Creeks and streams may rise out of their banks. In
addition, roads and streets may flood, especially in areas where
storm drains are clogged with debris. Finally, flooding of
basements may occur if thunderstorms train over urban areas.

* ADDITIONAL DETAILS...
- Over the next 36 hours, several rounds of torrential rain-
producing thunderstorms are possible in the watch area
including over areas that experienced several inches of rain
in the past few days. The tropical-like airmass will support
rain rates in excess of 2 inches per hour in the strongest
thunderstorms, leading to a threat for flash flooding.
- http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts and be prepared to take quick action
should flooding develop.

&&


https://wxn.io/98ghb
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 252007
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
307 PM 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-
307 PM CDT Fri Jul 25 2025 /407 PM EDT Fri Jul 25 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.
Elevated Flooding Risk.

DISCUSSION...

Isolated to scattered thunderstorms will continue this afternoon.
Brief torrential rainfall may lead to a continued threat for
isolated instances of flash flooding.

Additional heavy rain producing storms are possible this evening
and overnight, with an additional flash flood potential into
early Saturday morning. Initially, the main threat area will be
west of the Fox Valley, but may expand to include most of the
region tonight.

The strongest storms this afternoon and tonight will be capable
of producing strong and gusty winds.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday...
Limited Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Sunday...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday...
Elevated Excessive Heat Risk.
Tuesday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Elevated Excessive Heat Risk.
Wednesday...
Limited Thunderstorm Risk.

DISCUSSION...

Lingering thunderstorms Saturday will bring the chance for
torrential rainfall and localized flooding, particularly during
the morning, mainly nort...

https://wxn.io/axvix
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX

FLUS43 KLOT 251638
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1138 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-
1138 AM CDT Fri Jul 25 2025 /1238 PM 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...

Scattered to numerous showers and embedded thunderstorms will
occur today. The greatest coverage will be near and north of I-80.
Torrential rainfall and very slow storm motions will lead to a
threat for localized flash flooding.

Additional heavy rain producing storms are possible this evening
and overnight, with an additional flash flood potential into early
Saturday morning.

The strongest storms this afternoon and tonight will be capable of
producing strong and gusty winds.

.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 toni...

https://wxn.io/ovo1z
Posted by at

Hazardous Weather Outlook for McHenry Co., IL

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
Posted by at

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
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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
Posted by at

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
Posted by at

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
Posted by at

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
Posted by at

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
Posted by at

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
Posted by at

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
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