Hazardous Weather Outlook for McHenry Co., IL

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

FLUS43 KLOT 280927
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
427 AM CDT Mon Jul 28 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-
427 AM CDT Mon Jul 28 2025 /527 AM EDT Mon Jul 28 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.
Limited Flooding Risk.
Elevated Excessive Heat Risk.

DISCUSSION...

Scattered thunderstorms will spread across parts of northern
Illinois early this morning. Some of these storms will produce
locally torrential downpours and localized wind gusts up to 40 mph
early, before dissipating by late morning.

Hot and humid weather conditions are expected, with afternoon
peak heat indices of 105 to 109 degrees. Lingering effects of
morning storms and an afternoon lake breeze near Lake Michigan may
limit the effects of the heat in some spots.

Another strong thunderstorm complex is expected to approach the
area late tonight. While this thunderstorm complex may be in a
decaying mode as it arrives, there is some potential for damaging
wind gusts across northwest Illinois toward sunrise.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
Elevated Excessive Heat Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Limited Flooding Risk.

Wednesday...
High Swim Risk Lake Michigan Beaches.
Elevated Flooding Risk.
Limited Thunderstorm Risk.

Thursday...
High Swim Risk Lake Michigan Beaches.
Limited Thunderstorm Risk mainly south of U.S. 24.


DI...

https://wxn.io/4kr29