Thursday, August 26, 2021

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 262042
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
342 PM CDT Thu Aug 26 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-
342 PM CDT Thu Aug 26 2021 /442 PM EDT Thu Aug 26 2021/

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:
Limited wind risk...up to 60 mph.
Limited Flooding Risk.
Limited Excessive Heat Risk early this evening.

DISCUSSION...

Isolated to widely scattered thunderstorms are possible into early
this evening, with locally strong wind gusts strong enough to down
small tree limbs. Slow movement may result in locally heavy
rainfall and flooding. Additional thunderstorms may push east out
of Iowa later this evening, bringing a risk for wind gusts strong
enough to down tree limbs to the region. In addition, heavy
downpours could cause localized flooding.


.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Saturday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Sunday...
Elevated Thunderstorm Risk Late.
Limited Excessive Heat Risk.
Monday...
Elevated Thunderstorm Risk.
Tuesday and Wednesday...
Limited Thunderstorm Risk.

DISCUSSION:

Thunderstorms are possible each day of the period, but appear
most likely late Sunday and least likely on Saturday. Early next
week the focus shifts to southern portions of the forecast area.
Hot and humid conditions will continue with peak heat indices near
100 to 105 degrees on Friday and Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed this evening and tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east-northeast at 15 mph through early evening.
Moving toward the east at 20 to 30 mph late this evening and overnight.
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