C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 031949
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
249 PM CDT Sun Aug 3 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-
249 PM CDT Sun Aug 3 2025 /349 PM EDT Sun Aug 3 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...Monday through Saturday.
Tuesday Afternoon...
Limited Thunderstorm Risk.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/3sg90
John Jensen K9WXX of McHenry County Weather is an avid and passionate weather geek who post watches, warnings and advisories on our blog and Facebook
Established: 2013
Coverage Area:
McHenry County, IL
Sunday, August 3, 2025
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 030846
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
346 AM CDT Sun Aug 3 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-
346 AM CDT Sun Aug 3 2025 /446 AM EDT Sun Aug 3 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...Monday through Saturday.
Tuesday Afternoon...
Limited Thunderstorm Risk.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/zoy6h
FLUS43 KLOT 030846
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
346 AM CDT Sun Aug 3 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-
346 AM CDT Sun Aug 3 2025 /446 AM EDT Sun Aug 3 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...Monday through Saturday.
Tuesday Afternoon...
Limited Thunderstorm Risk.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/zoy6h
Air Quality Alert for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
AEUS73 KLOT 030505
AQALOT
Air Quality Alert Message
Relayed by National Weather Service Chicago IL
1205 AM CDT Sun Aug 3 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
1205 AM CDT Sun Aug 3 2025
...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT CDT TONIGHT...
The Illinois Environmental Protection Agency has determined that an
"Air Pollution Action Day" will remain in effect for the greater
Chicago Metropolitan Area through midnight tonight.
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
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/3n772
AEUS73 KLOT 030505
AQALOT
Air Quality Alert Message
Relayed by National Weather Service Chicago IL
1205 AM CDT Sun Aug 3 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
1205 AM CDT Sun Aug 3 2025
...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT CDT TONIGHT...
The Illinois Environmental Protection Agency has determined that an
"Air Pollution Action Day" will remain in effect for the greater
Chicago Metropolitan Area through midnight tonight.
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
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/3n772
Saturday, August 2, 2025
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 022014
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
314 PM CDT Sat Aug 2 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-
314 PM CDT Sat Aug 2 2025 /414 PM EDT Sat Aug 2 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...Sunday through Friday.
Tuesday Afternoon...
Limited Thunderstorm Risk.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/h7zx6
FLUS43 KLOT 022014
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
314 PM CDT Sat Aug 2 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-
314 PM CDT Sat Aug 2 2025 /414 PM EDT Sat Aug 2 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...Sunday through Friday.
Tuesday Afternoon...
Limited Thunderstorm Risk.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/h7zx6
Air Quality Alert for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
AEUS73 KLOT 021812
AQALOT
Air Quality Alert Message
Relayed by National Weather Service Chicago IL
112 PM CDT Sat Aug 2 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
112 PM CDT Sat Aug 2 2025
...AIR QUALITY ALERT IN EFFECT NOW THROUGH SUNDAY NIGHT...
The Illinois Environmental Protection Agency has determined that an
"Air Pollution Action Day" will remain in effect for the
greater Chicago metropolitan area through Sunday night, August 3rd.
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
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/exfmj
AEUS73 KLOT 021812
AQALOT
Air Quality Alert Message
Relayed by National Weather Service Chicago IL
112 PM CDT Sat Aug 2 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
112 PM CDT Sat Aug 2 2025
...AIR QUALITY ALERT IN EFFECT NOW THROUGH SUNDAY NIGHT...
The Illinois Environmental Protection Agency has determined that an
"Air Pollution Action Day" will remain in effect for the
greater Chicago metropolitan area through Sunday night, August 3rd.
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
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/exfmj
Air Quality Alert for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
AEUS73 KLOT 021743
AQALOT
Air Quality Alert Message
Relayed by National Weather Service Chicago IL
1243 PM CDT Sat Aug 2 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
1243 PM CDT Sat Aug 2 2025
...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT CDT TONIGHT...
The Illinois Environmental Protection Agency has determined that an
"Air Pollution Action Day" will remain in effect for the
greater Chicago metropolitan area through tonight.
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
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/jypwr
AEUS73 KLOT 021743
AQALOT
Air Quality Alert Message
Relayed by National Weather Service Chicago IL
1243 PM CDT Sat Aug 2 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
1243 PM CDT Sat Aug 2 2025
...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT CDT TONIGHT...
The Illinois Environmental Protection Agency has determined that an
"Air Pollution Action Day" will remain in effect for the
greater Chicago metropolitan area through tonight.
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
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/jypwr
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 020900
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
400 AM CDT Sat Aug 2 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 Sat Aug 2 2025 /500 AM EDT Sat Aug 2 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...Sunday through Friday.
Tuesday...
Limited Thunderstorm Risk.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/n0jme
FLUS43 KLOT 020900
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
400 AM CDT Sat Aug 2 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 Sat Aug 2 2025 /500 AM EDT Sat Aug 2 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...Sunday through Friday.
Tuesday...
Limited Thunderstorm Risk.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/n0jme
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