Sunday, July 9, 2017

Hazardous Weather Outlook for McHenry Co., IL

FLUS43 KLOT 090850
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
350 AM CDT Sun Jul 9 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-
350 AM CDT Sun Jul 9 2017 /450 AM EDT Sun Jul 9 2017/

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

.DAY ONE...Today and Tonight.

WEATHER HAZARDS EXPECTED:
Significant Thunderstorm Risk...with an associated:
Elevated Hail Risk...up to quarter size.
Elevated Thunderstorm Wind Damage Risk...up to 60 MPH.
Elevated Flooding Risk.

DISCUSSION:

There will be increasing chances for thunderstorms this evening
and overnight. Thunderstorms may move into northcentral Illinois
shortly after midnight and then spread south and east across the
region through the early morning hours. Some storms may be severe,
producing strong, damaging winds and large hail. Heavy downpours
are possible with these storms and may lead to flooding.

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

Monday and Tuesday...
Elevated Flooding Risk.
Limited Severe Thunderstorm Risk.
Wednesday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Thursday through Saturday...
Limited Thunderstorm Risk.

DISCUSSION:

Periodic chances for showers and thunderstorms are likely through
the week. There will be a continued threat for locally heavy
rainfall and severe thunderstorms through Tuesday as the area
remains under warm and humid conditions.

Heat index values may reach or slightly exceed 100 degrees on
Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotters will likely be needed late tonight into Monday.

GENERAL STORM MOTION OF THE DAY:

Moving southeast at 30 MPH...

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