Hazardous Weather Outlook for McHenry Co., IL

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

FLUS43 KLOT 280209 AAA
HWOLOT

Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
909 PM 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-
909 PM CDT Sun Jul 27 2025 /1009 PM EDT Sun Jul 27 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.
Limited Flooding Risk.

DISCUSSION...

Isolated thunderstorms can't be ruled out in the late evening and
early overnight hours, mainly south of I-80. Main hazards would
include localized downpours and a few lightning strikes.

A decaying thunderstorm complex may move into northwest Illinois
early Monday morning and be capable of strong to locally damaging
wind gusts, mainly near and west of Interstate 39.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday and 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.

DISCUSSION...

Dangerous heat and humidity are expected Monday and Tuesday, but
some uncertainty remains due to potential impacts from morning
storms each day.

Periods of thunderstorms are possible Monday through Wednesday.
Some of which could be strong to severe and also produce
torrential rain which may lead to localized flash flooding.

High waves and dangerous swimming conditions are possible
Wednesday through Thursda...

https://wxn.io/l5cli