Hazardous Weather Outlook for McHenry Co., IL

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

FLUS43 KLOT 290928
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
428 AM CDT Tue Jul 29 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-
428 AM CDT Tue Jul 29 2025 /528 AM EDT Tue Jul 29 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.
Limited Excessive Heat Risk.

DISCUSSION...

A decaying complex of thunderstorms is moving into western
Illinois early this morning, with storms expected mainly along and
west of the I-39 corridor. Additional isolated to widely
scattered thunderstorms are possible later this afternoon and
evening, mainly northwest of I-88. While not expected to be
widespread, an isolated damaging wind gust can't be ruled out with
these storms. Some of these storms may also produce brief
torrential downpours which could lead to minor localized flooding.

Additional thunderstorms may approach north central Illinois
again toward sunrise Wednesday.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
Elevated Flooding Risk.
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.
Thursday...
Limited Thunderstorm Risk.
High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Periods of thunderstorms are likely Wednesday through Thursday
morning. Some of these storms Wednesday could be strong to severe
and also produce torrential rain which may lead to localized flash
flooding.

High waves and dangerous swimming c...

https://wxn.io/ym0ym