Sunday, June 17, 2018

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 172051 HWOLOT

Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 351 PM CDT Sun Jun 17 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- 351 PM CDT Sun Jun 17 2018 /451 PM EDT Sun Jun 17 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.  Significant Excessive heat Risk.

DISCUSSION…

Temperatures in the low to mid 90s and dewpoints in the 70s will result in dangerous heat indices of 100 to 110 area wide.

Isolated to scattered showers and storms are expected this afternoon. A few storms may become strong and produce gusty winds and brief, heavy downpours.

.DAYS TWO THROUGH SEVEN…Monday through Saturday.

Monday…

Limited Severe Thunderstorm Risk.  Limited Flooding Risk.  Elevated Excessive Heat Risk.

Tuesday…

Limited Flooding Risk.  Elevated Thunderstorm Risk.  Limited Excessive Heat Risk.

Wednesday…

Limited Thunderstorm Risk.

Thursday…

Elevated Thunderstorm Risk.

Friday and Saturday…

Limited Thunderstorm Risk.

DISCUSSION:

Temperatures will warm to the low to mid 90s on Monday. This combined with dewpoints in the 70s will result in dangerous heat indices of 100 to 105 area wide, with highest confidence south and west.

Thunderstorms are expected Monday afternoon and evening. An isolated strong to severe thunderstorm is possible, with heavy rainfall also expected. Heavy rain from thunderstorms is also possible Tuesday, which may lead to flash flooding.

.SPOTTER INFORMATION STATEMENT…

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the northeast at 15 MPH.

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