Thursday, June 7, 2018

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 072038 HWOLOT

Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 338 PM CDT Thu Jun 7 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- 338 PM CDT Thu Jun 7 2018 /438 PM EDT Thu Jun 7 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…

Limited Thunderstorm Risk...with an associated:    Limited hail risk...up to dime size.    Limited damaging wind risk...up to 50 mph.

DISCUSSION…

A nearly stationary frontal boundary will be the focus for some scattered thunderstorms across southern sections of the area late this afternoon through early this evening. These thunderstorms will generally develop late this afternoon south of a line from near Peru through Kankakee to De Motte Indiana. While severe weather is not expected to be a big concern with these storms, some of the stronger storms could produce small hail and localized strong wind gusts to 50 mph, as well as a brief period of heavy rain.

Another round of thunderstorms is expected to move eastward into the area toward daybreak Friday.

.DAYS TWO THROUGH SEVEN…Friday through Wednesday.

Friday…

Limited Severe Thunderstorm Risk.  Limited Flooding Risk.

Saturday…

Limited Severe Thunderstorm Risk Far South.

Sunday through Wednesday…

Limited Thunderstorm Risk.

DISCUSSION:

While there is a small chance of thunderstorms through early next week, the best chances for storms will be Friday and Friday night. A few of these storms could be strong to severe, mainly across the south half of the forecast area Friday afternoon and evening. Very heavy rainfall is also likely to accompany these storms and this could result in a localized flash flood threat, particularly if these heavy rain producing storms train over the Chicago metro area.

.SPOTTER INFORMATION STATEMENT…

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward east southeast 10 to 20 mph.

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