Thursday, June 17, 2021

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 170845
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
345 AM CDT Thu Jun 17 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-
345 AM CDT Thu Jun 17 2021 /445 AM EDT Thu Jun 17 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...

Significant Thunderstorm Risk...with an associated:
Limited Damaging Wind Risk...up to 65 mph.
Limited Hail Risk...up to ping pong ball size.
Limited Tornado Risk.
Limited Flooding Risk.
Elevated Fire Weather Risk.

DISCUSSION...

Low relative humidity values combined with gusty south winds will
produce elevated fire weather conditions this afternoon.

Thunderstorms are expected to move into the area late this
evening and overnight. Some storms could become severe with
damaging winds up to 65 mph and hail up to the size of ping pong
balls possible. Very heavy rain is also expected with any storms
that develop and may result in localized flooding.

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

Friday...
Limited Severe Thunderstorm Risk.
Limited Excessive Heat Risk.
Saturday through Monday...
Limited Thunderstorm Risk.
Wednesday...
Limited Thunderstorm Risk.

DISCUSSION:

Additional scattered thunderstorms are possible Friday afternoon
mainly south of Interstate 80, with a few strong to severe
storms possible.

Hot and humid conditions will result in heat indices possibly
over 100 degrees Friday afternoon, primarily south of Interstate
80.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed this evening and overnight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east to southeast around 35 mph.
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