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...

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