Wednesday, September 5, 2018

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 051448 HWOLOT

Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 948 AM CDT Wed Sep 5 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- 948 AM CDT Wed Sep 5 2018 /1048 AM EDT Wed Sep 5 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…

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

DISCUSSION…

Scattered thunderstorms will accompany a cold front this afternoon and tonight. A severe thunderstorm or two is possible, mainly east and north of a line from Woodstock to Ottawa to Rensselaer. Heavy rain from these storms may create flooding especially in locations that have recently seen an abundance of rain.

.DAYS TWO THROUGH SEVEN…Thursday through Tuesday.

Thursday and Friday…

Elevated Flooding Risk.  Limited Thunderstorm Risk.  High Swim Risk

Saturday…

Limited Flooding Risk.  Elevated Thunderstorm Risk.  Limited Lakeshore Flood Risk  High Swim Risk

Sunday…

Limited Thunderstorm Risk.  Limited Lakeshore Flood Risk  High Swim Risk

DISCUSSION:

Multiple rainfall episodes, some heavy, are possible Thursday night through Saturday night, especially south of Interstate

  1. If these were to pan out over the same area, flooding would

be a concern.

Dangerous swimming conditions are also expected across much of the Lake Michigan beaches through this weekend.

.SPOTTER INFORMATION STATEMENT…

Spotters may be needed this afternoon and evening.

GENERAL STORM MOTION OF THE DAY:

Moving toward east to northeast around 30 mph.

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