FLUS43 KLOT 032056
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
356 PM CDT Thu Aug 3 2017
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-
356 PM CDT Thu Aug 3 2017 /456 PM EDT Thu Aug 3 2017/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...Tonight.
WEATHER HAZARDS EXPECTED:
Elevated Thunderstorm Risk...with an associated:
Limited Tornado Risk.
Elevated Hail Risk...up to quarter size.
Elevated Thunderstorm Wind Damage Risk...up to 70 MPH.
Limited Flooding Risk.
DISCUSSION:
Widely scattered to scattered thunderstorms will continue through
this evening. Storm coverage and intensity will increase through
the late afternoon into the evening hours. One general area of
thunderstorms over northeastern and east-central Illinois into
northwest Indiana will continue to push east, with chances for
marginally severe hail, strong, damaging wind gusts and heavy
downpours. Localized flooding will be possible.
Another line of storms developing just west of the Mississippi
River along a cold front will push into northwestern Illinois by
early evening and then push east across the outlook area. With
this line, the most likely hazards are damaging winds and quarter
size hail. There is a low, but non-zero, risk of a tornado as
well, should some storms develop supercell characteristics. The
thunderstorm threat will end from west to east during the late
evening hours and come to an end by around midnight tonight.
In addition, portions of the Pecatonica River will remain in
flood.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Sunday and Monday...
Limited Thunderstorm Risk.
Wednesday...
Limited Thunderstorm Risk.
.SPOTTER INFORMATION STATEMENT...
Spotters will likely be needed this afternoon through this
evening.
GENERAL STORM MOTION OF THE DAY:
East at 30 mph.
&&
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