Monday, August 9, 2021

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 092049
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
349 PM CDT Mon Aug 9 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-
349 PM CDT Mon Aug 9 2021 /449 PM EDT Mon Aug 9 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

Elevated Thunderstorm Risk...with an associated:
Limited Tornado risk.
Limited hail risk...up to nickel size.
Limited damaging wind risk...up to 70 mph.
Limited Flooding Risk.
Limited Excessive Heat Risk.

DISCUSSION...

Severe thunderstorms are possible across northern Illinois and
northwest Indiana this evening, with an
areawide threat for damaging winds, large hail, and a tornado or
two. The threat for locally heavy rainfall and flooding also
exists, especially in the late evening and overnight.


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

Tuesday...
Elevated Severe Thunderstorm Risk.
Limited Flooding Risk.
Elevated Excessive Heat Risk.
Wednesday...
Limited Severe Thunderstorm Risk.
Limited Excessive Heat Risk.
Thursday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Friday...
Limited Thunderstorm Risk.

DISCUSSION:

Periodic thunderstorms are expected through Friday, with strong
to severe storms possible Tuesday.

Warm and very humid conditions will persist through Thursday.
Heat indices over 100 are expected during the afternoon hours,
with dangerous heat index values likely surpassing 105 Tuesday
afternoon in many locations.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed this evening.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east southeast around 25 mph.
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