Thursday, August 27, 2020

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 271709 AAA
HWOLOT

Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
1209 PM CDT Thu Aug 27 2020


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1209 PM CDT Thu Aug 27 2020 /109 PM EDT Thu Aug 27 2020/

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 Excessive Heat Risk.
Limited Thunderstorm Risk...with an associated:
Limited hail risk...up to quarter size.
Limited damaging wind risk...up to 60 mph.
Limited Flooding Risk.

DISCUSSION...

High temperatures in or near the mid 90s this afternoon will result
in heat indices of 96 to 102 degrees. Continue to practice heat
safety.

Scattered thunderstorms are possible later this afternoon into
tonight in northeast Illinois and far north central Illinois near
the Wisconsin state line. A few of these storms may be severe with
strong downburst wind gusts and hail the main threats if stronger
storms can move into the area. There also could be locally heavy
rainfall.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday...
Elevated Severe Thunderstorm Risk.
Limited Flooding Risk.
Limited Excessive Heat Risk.
Saturday...
High Swim Risk.
Monday through Wednesday...
Limited Thunderstorm Risk.

DISCUSSION:

Thunderstorms are likely to move west to east across the area late
Friday afternoon into Friday night. There is potential for these
to be severe, especially along and north of I-80 in northern
Illinois.

Saturday will see dangerous swimming conditions on northwest
Indiana beaches and likely some Illinois beaches.

.SPOTTER INFORMATION STATEMENT...

Spotter activation cannot be ruled out late today into
this evening primarily in far northern and northeast
Illinois, and activation may be needed Friday afternoon and
evening.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east-southeast at 25 mph.
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