Thursday, August 23, 2018

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 232110 HWOLOT

Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 410 PM CDT Thu Aug 23 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- 410 PM CDT Thu Aug 23 2018 /510 PM EDT Thu Aug 23 2018/

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

.DAY ONE…Tonight.

Weather hazards expected…

Limited Thunderstorm Risk late west of Interstate 39.

DISCUSSION…

Isolated thunderstorms are possible late tonight mainly west of Interstate 39 in northwest Illinois. Severe weather is not expected.

.DAYS TWO THROUGH SEVEN…Friday through Wednesday.

Friday…

Limited Severe Thunderstorm Risk evening and night mainly  west of Interstate 39 in northwest Illinois.  Elevated Flooding Risk mainly north of Interstate 88.

Saturday through Tuesday…

Limited Thunderstorm Risk at times.  Limited Excessive Heat Risk.

Wednesday…

Limited Thunderstorm Risk.

DISCUSSION:

There is a risk for localized flooding Friday night due to recent heavy rainfall and the chance for additional moderate to heavy rainfall, mainly in areas toward the Wisconsin line. There is a limited risk for strong to severe thunderstorms mainly west of Interstate 39 in northwest Illinois during the evening.

Heat and humidity will return over the weekend into early next work week with peak heat index values up to around 100 degrees forecast. In addition, there will be periodic chances for thunderstorms.

.SPOTTER INFORMATION STATEMENT…

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east at around 20 to 30 mph.

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