Wednesday, August 25, 2021

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 250858
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
358 AM CDT Wed Aug 25 2021


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-
358 AM CDT Wed Aug 25 2021 /458 AM EDT Wed Aug 25 2021/

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:
Limited damaging wind risk...up to 60 mph.
Limited Flooding Risk.
Elevated Excessive Heat Risk south of I-80.

DISCUSSION...
Showers and perhaps a few non-severe storms are possible this
morning, mainly near and north of I-80.

Additional scattered thunderstorms are then possible this
afternoon and evening. A few storms could become strong to
marginally severe with winds strong enough to down tree limbs. In
addition, torrential rainfall with the strongest storms could lead
to some isolated instances of flooding.

Peak heat indices this afternoon of 104 to 108 degrees are
expected for areas along and south of I-80 where a Heat Advisory
is in effect.

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

Thursday through Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday and Tuesday...
Limited Thunderstorm Risk.

DISCUSSION:

Periodic thunderstorms will occur through the weekend, though many
hours will stay dry. Storms on Thursday and Thursday night may
continue to pose a threat for strong wind gusts.

.SPOTTER INFORMATION STATEMENT...

Given the limited nature of any severe threat today, spotters
are not currently expected to be needed, although timely reports
of damage are appreciated.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east at 20 mph.
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