Hazardous Weather Outlook for McHenry Co., IL

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

FLUS43 KLOT 300958
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
458 AM CDT Wed Jul 30 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-
458 AM CDT Wed Jul 30 2025 /558 AM EDT Wed Jul 30 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...

Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Damaging Wind Risk...up to 60 mph.
Elevated Flooding Risk.
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Several rounds of thunderstorms will affect the area from this
morning through tonight. A few storms today may be severe, capable
of producing isolated damaging wind gusts. These storms will also
likely produce torrential downpours which may lead to localized
flash flooding, especially if repeated rounds of storms track
across the same area. Periods of heavy rain are possible tonight.

Strengthening northeast winds and building waves on Lake Michigan
will produce hazardous swim conditions from this afternoon through
tonight.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Friday...
High Swim Risk Lake Michigan Beaches.
Tuesday...
Limited Thunderstorm Risk.

DISCUSSION...

Showers and scattered thunderstorms will linger Thursday, but will
gradually diminish from north to south through the day. Some of these
storms may produce locally heavy rainfall through early afternoon.

Hazardous swimming conditions will persist at Lake Michigan beaches
into Friday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is n...

https://wxn.io/u42ey