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