Sunday, August 20, 2017

Hazardous Weather Outlook for McHenry Co., IL

FLUS43 KLOT 201708
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1208 PM CDT Sun Aug 20 2017


Winnebago-Boone-McHenry-Lake Illinois-Ogle-Lee-De Kalb-Kane-
DuPage-Cook-La Salle-Kendall-Grundy-Will-Kankakee-Livingston-
Iroquois-Ford-Lake Indiana-Porter-Newton-Jasper-Benton-
1208 PM CDT Sun Aug 20 2017 /108 PM EDT Sun Aug 20 2017/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...This Afternoon and Tonight.

WEATHER HAZARDS EXPECTED:
Limited Thunderstorm Risk.

DISCUSSION:

An isolated thunderstorm is possible this afternoon and this
evening. There will be another chance of some scattered
thunderstorms along and ahead of a cold front late tonight, mainly
over north-central Illinois.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday...
Elevated Flooding Risk.
Elevated Severe Thunderstorm Risk.

Tuesday...
Limited Thunderstorm Risk.
High Swim Risk.

Wednesday...
High Swim Risk.

DISCUSSION:

Deep layer moisture pooling along a cold front moving slowly
through northern Illinois Monday night will generate strong
thunderstorms. These storms will be capable of producing very
heavy rainfall and strong, damaging winds. The heavy rainfall may
lead to localized flooding.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

To the east at 10 to 20 mph.

&&



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