Wednesday, July 17, 2019

Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 170830
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
330 AM CDT Wed Jul 17 2019


Winnebago-Boone-McHenry-Lake-Ogle-Lee-De Kalb-Kane-DuPage-Cook-
La Salle-Kendall-Grundy-Will-Kankakee-Livingston-Iroquois-Ford-
Porter-Newton-Jasper-Benton-
330 AM CDT Wed Jul 17 2019 /430 AM EDT Wed Jul 17 2019/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

Elevated Thunderstorm Risk...with an associated:
Limited hail risk...up to nickel size.
Elevated damaging wind risk...up to 60 mph.
Limited Flooding Risk.
Limited Excessive heat Risk.
Limited Fog Risk this Morning.

DISCUSSION...

Strong to severe thunderstorms are possible late tonight, after
midnight, through early Thursday morning. Although storms are
possible across much of northern Illinois and northwest Indiana,
the highest potential at this time is over north central
Illinois. The main threats are damaging winds and heavy rainfall
with localized flooding.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Significant Excessive Heat Risk.
Friday and Saturday...
Limited Thunderstorm Risk.
Significant Excessive Heat Risk.
Sunday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Monday...
Limited Thunderstorm Risk.

DISCUSSION:

Heat will build to dangerous levels later in the week for the
entire area Thursday through Saturday. Heat indices look to climb
in excess of 105 degrees for much of the area. Very warm overnight
temperatures will offer little relief from the heat and humidity,
especially in the urban heat island of Chicago.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed after midnight tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the southeast at 35 to 45 mph.
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