Air Quality Alert for McHenry Co., IL

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

AEUS73 KLOT 040919
AQALOT

Air Quality Alert Message
Relayed by National Weather Service Chicago IL
419 AM CDT Fri Jul 4 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
419 AM CDT Fri Jul 4 2025

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

The Illinois Environmental Protection Agency has determined that an
Air Pollution Action Day will be declared for the greater Chicago
Metropolitan Area and is IN EFFECT UNTIL MIDNIGHT CDT TONIGHT.

An Air Pollution Action Day is declared when weather conditions are
such that widespread ozone and or particulate levels are expected to
be at or above the Unhealthy for Sensitive Groups category of the
Air Quality Index for multiple days. Ozone is expected to be the
primary pollutant of concern, but fireworks emissions may also
contribute to higher AQI readings for both PM2.5 and Ozone at times.

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/5nacw

Hazardous Weather Outlook for McHenry Co., IL

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

FLUS43 KLOT 040845
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
345 AM CDT Fri Jul 4 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-
345 AM CDT Fri Jul 4 2025 /445 AM EDT Fri Jul 4 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, Mainly This Morning.

DISCUSSION...

Scattered thunderstorms are expected, mainly this morning, north
of Interstate 80. Widespread severe weather is not expected, but
an isolated severe thunderstorm is possible with localized wind
gusts to 60 mph.

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

Saturday...
Limited Thunderstorm Risk.
Sunday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Monday through Thursday...
Limited Thunderstorm Risk.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the southeast at 25 to 35 mph.


https://wxn.io/x7atc

Hazardous Weather Outlook for McHenry Co., IL

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

FLUS43 KLOT 040144
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
844 PM CDT Thu Jul 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-
844 PM CDT Thu Jul 3 2025 /944 PM EDT Thu Jul 3 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, mainly north of I-90.

DISCUSSION...

Storms are possible across far northern IL late tonight, mainly
north of Interstate 90.

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

Friday Morning...
Limited Thunderstorm Risk.
Friday Afternoon through Saturday...
Limited Excessive Heat Risk.
Saturday Night...
Limited Thunderstorm Risk.
Sunday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Tuesday and Wednesday...
Limited Thunderstorm Risk.

DISCUSSION...

Heat indices of 95 to 100 degrees are expected Friday and
Saturday. Shower and thunderstorm chances will increase Saturday
night and Sunday.

.SPOTTER INFORMATION STATEMENT...

Spotters activation is unlikely through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the southeast around 20 mph.


https://wxn.io/xd5m7

Hazardous Weather Outlook for McHenry Co., IL

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

FLUS43 KLOT 032041
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
341 PM CDT Thu Jul 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-
341 PM CDT Thu Jul 3 2025 /441 PM EDT Thu Jul 3 2025/

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

.DAY ONE...Tonight.

Weather hazards expected...

Limited Thunderstorm Risk

DISCUSSION...

Isolated thunderstorms are possible early this evening, the
strongest of which could produce locally gusty winds. Additional
storms are possible across far northern IL late tonight.

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

Friday Morning...
Limited Thunderstorm Risk.
Friday Afternoon through Saturday...
Limited Excessive Heat Risk.
Saturday Night...
Limited Thunderstorm Risk.
Sunday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Tuesday and Wednesday...
Limited Thunderstorm Risk.

DISCUSSION...

Heat indices of 95 to 100 degrees are expected Friday and
Saturday. Shower and thunderstorm chances will increase Saturday
night and Sunday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is unlikely through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the southeast around 20 mph.


https://wxn.io/xsawm

Hazardous Weather Outlook for McHenry Co., IL

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

FLUS43 KLOT 031800
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
100 PM CDT Thu Jul 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-
100 PM CDT Thu Jul 3 2025 /200 PM EDT Thu Jul 3 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

DISCUSSION...

Isolated thunderstorms are possible this afternoon and evening,
the strongest of which could produce locally gusty winds.

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

Friday and Saturday...
Limited Excessive Heat Risk.
Saturday Night...
Limited Thunderstorm Risk.
Sunday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Tuesday and Wednesday...
Limited Thunderstorm Risk.

DISCUSSION...

Heat indices of 95 to 100 degrees are expected Friday and
Saturday. Shower and thunderstorm chances will increase Saturday
night and Sunday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is unlikely through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the southeast around 20 mph.


https://wxn.io/uctlf

Air Quality Alert for McHenry Co., IL

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

AEUS73 KLOT 031610
AQALOT

Air Quality Alert Message
Relayed by National Weather Service Chicago IL
1110 AM CDT Thu Jul 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
1110 AM CDT Thu Jul 3 2025

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


The Illinois Environmental Protection Agency has determined that an
Air Pollution Action Day will be declared for the greater Chicago
Metropolitan Area and is IN EFFECT THROUGH FRIDAY NIGHT.

An Air Pollution Action Day is declared when weather conditions are
such that widespread ozone and or particulate levels are expected to
be at or above the Unhealthy for Sensitive Groups category of the
Air Quality Index for multiple days. Ozone is expected to be the
primary pollutant of concern, but fireworks emissions may also
contribute to higher AQI readings for both PM2.5 and Ozone at times.

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/4umk4

Hazardous Weather Outlook for McHenry Co., IL

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

FLUS43 KLOT 030830
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
330 AM CDT Thu Jul 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-
330 AM CDT Thu Jul 3 2025 /430 AM EDT Thu Jul 3 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

DISCUSSION...

Isolated thunderstorms are possible this afternoon and evening,
the strongest of which could produce locally gusty winds.

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

Friday and Saturday...
Limited Excessive Heat Risk.
Saturday Night...
Limited Thunderstorm Risk.
Sunday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Tuesday and Wednesday...
Limited Thunderstorm Risk.

DISCUSSION...

Heat indices of 95 to 100 degrees are expected Friday and
Saturday. Shower and thunderstorm chances will increase Saturday
night and Sunday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is unlikely through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the southeast around 20 mph.


https://wxn.io/xhdqv