Thursday, September 20, 2018

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 201531 HWOLOT

Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 1031 AM CDT Thu Sep 20 2018

Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-DeKalb-Kane-DuPage-Cook- La Salle-Kendall-Grundy-Will-Kankakee-Livingston-Iroquois-Ford- Lake IN-Porter-Newton-Jasper-Benton- 1031 AM CDT Thu Sep 20 2018 /1131 AM EDT Thu Sep 20 2018/

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.  Limited Excessive heat Risk.

DISCUSSION…

Isolated thunderstorms are possible across the outlook area this afternoon, as a warm front lifts across the region. If storms develop this afternoon, a stronger storm or two capable of gusty winds are possible. As the warm front lifts north, temperatures will warm to around 90 or the lower 90s in many spots, with heat index values peaking in the 94 to 102 range during the warmest part of the afternoon. There is an additional chance of thunderstorms late tonight as a cold front moves through.

.DAYS TWO THROUGH SEVEN…Friday through Wednesday.

Friday…

Limited Thunderstorm Risk.  High Swim Risk

Saturday…

High Swim Risk

Monday…

Limited Thunderstorm Risk.

Tuesday…

Elevated Thunderstorm Risk.

DISCUSSION:

Scattered thunderstorms will end from northwest to southeast across the area Friday, as a cold front moves through the area. Gusty north winds will develop later in the day and continue Friday night, which will result in building waves and dangerous swim conditions developing at Lake Michigan beaches.

.SPOTTER INFORMATION STATEMENT…

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east-northeast around 30 mph. </pre>

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