Monday, June 23, 2025

Hazardous Weather Outlook for McHenry Co., IL

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

FLUS43 KLOT 232033
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
333 PM CDT Mon Jun 23 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-
333 PM CDT Mon Jun 23 2025 /433 PM EDT Mon Jun 23 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, mainly in northwest Illinois.
Elevated Excessive Heat Risk.

DISCUSSION...

Oppressive heat and humidity will persist into this evening, with
heat indices gradually falling through the 90s early.

A few thunderstorms may move into portions of northern Illinois
late this evening and overnight, along an outflow boundary that is
expected to push into the area from Wisconsin. The strongest
storms will be capable of frequent lightning, gusty outflow winds,
and heavy rainfall.

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

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

Thursday through Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.

DISCUSSION...

Periodic thunderstorm chances will exist into the weekend, as
a nearly stationary frontal boundary lingers in the vicinity.
The strongest storms may be capable of producing damaging
wind gusts and localized flooding.

While lower than the past few days, afternoon peak heat indices
near 100 are expected, especially south of I-80.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely not be n...

https://wxn.io/a0e02