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