Sunday, January 21, 2018

Hazardous Weather Outlook for McHenry Co., IL

FLUS43 KLOT 212140
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
340 PM CST Sun Jan 21 2018


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-
340 PM CST Sun Jan 21 2018 /440 PM EST Sun Jan 21 2018/

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

.DAY ONE...Tonight.

WEATHER HAZARDS EXPECTED:
Limited Thunderstorm Risk.
Significant Fog Risk.

DISCUSSION:

Areas of dense fog are likely will continue into tonight, with fog
lifting from south to north overnight into early Monday.

Showers and scattered thunderstorms are likely tonight, especially
after midnight. In addition to cloud to ground lightning, some of
the thunderstorms will produce very heavy downpours. Locally heavy
rainfall totals could result in localized minor flooding,
especially in low lying and flood prone areas.

Localized ice jam flooding will remain a threat on area rivers.

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

Monday...
Limited Thunderstorm Risk.
Limited Fog Risk.
Elevated Snow Risk.
Tuesday...
Limited Snow Risk.

DISCUSSION:

Scattered thunderstorms, some with heavy rain, will likely linger
into the morning hours Monday. The threat of locally heavy rain
will continue early Monday morning, with localized mainly minor
flooding remaining a threat. Additional isolated thunderstorms
are possible Monday afternoon and early evening.

Rain is expected to change to snow overnight Monday night. Snow
could accumulate Monday night, especially near the Wisconsin
border.

Finally, localized ice jam flooding will remain a threat on area
rivers.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.


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