Monday, August 20, 2018

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 201653 HWOLOT

Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 1153 AM CDT Mon Aug 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- 1153 AM CDT Mon Aug 20 2018 /1253 PM EDT Mon Aug 20 2018/

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

.DAY ONE…This Afternoon and Tonight.

Weather hazards expected…

Significant Thunderstorm Risk...with an associated:     Elevated Tornado risk.     Limited damaging wind risk...up to 60 mph.  Limited Flooding Risk.  High Swim Risk

DISCUSSION…

Thunder will be limited with most of the shower activity through early afternoon. Expect occasional showers and thunderstorms this afternoon. from northwest Illinois arcing southeast to portions of east central Illinois. Conditions could become favorable for a couple of these storms to potentially become tornadic from mid afternoon until around sunset. There is also a low damaging wind threat. The greatest risk of severe weather is south and west of a line from Dixon to Joliet to Fowler Indiana.

.DAYS TWO THROUGH SEVEN…Tuesday through Sunday.

Tuesday…

Limited Thunderstorm Risk.  Elevated Lakeshore Flood Risk  High Swim Risk

Wednesday…

High Swim Risk

Friday…

Elevated Thunderstorm Risk.

Saturday…

Limited Thunderstorm Risk.

Sunday…

Limited Thunderstorm Risk.  Limited Excessive Heat Risk.

DISCUSSION:

Dangerous swim conditions will continue in Wednesday for all nearshore waters along southern Lake Michigan.

.SPOTTER INFORMATION STATEMENT…

Spotters may be needed between 2 pm and 9 pm.

GENERAL STORM MOTION OF THE DAY:

Moving toward the north or northeast at 25 mph.

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