Friday, December 11, 2020

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 112208
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
408 PM CST Fri Dec 11 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-
408 PM CST Fri Dec 11 2020 /508 PM EST Fri Dec 11 2020/

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 overnight.
Limited Non Thunderstorm Wind Risk near Lake Michigan.
Elevated Lakeshore Flood Risk along the Illinois shore.

DISCUSSION...

A storm system is approaching the area this evening. Strong
northerly winds will result in the potential for lakeshore
flooding along the Lake Michigan shore tonight through Saturday,
with gusts to 40 mph possible along the lake across parts of
northern Illinois.

A few thunderstorms are also possible southeast of Interstate 55
overnight into Saturday morning.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday...
Elevated to Significant Lakeshore Flood Risk, highest threat along
the northern Illinois shore.
Limited Thunderstorm Risk in the morning.
Limited Non Thunderstorm Wind Risk near Lake Michigan.
Limited Fog Risk in the morning.
Limited Snow Risk across northwest and north central Illinois.
Sunday...
Elevated Lakeshore Flood Risk northwest Indiana shore.

DISCUSSION:

Rain may mix with or change to snow across far northwest and far
northern Illinois early Saturday. The rain snow line would then
likely shift gradually southeast through Saturday evening as
colder air is drawn into the departing storm. It appears that
portions of northwest and far northern Illinois would have some
potential for at least some minor slushy snow accumulations. A
slightly farther south storm track could result in colder air
being available when the heavier precipitation is falling to
result in more wet snow for these areas.

The potential for lakeshore flooding along the Lake Michigan
shore will continue through Saturday with the highest threat along
the northern Illinois shore.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the northeast at 40 mph
</pre>


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