Severe Thunderstorm Warning 39, NWS Chicago, IL

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Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1147 AM CDT Mon Jul 4 2022

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-051700-
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-
1147 AM CDT Mon Jul 4 2022 /1247 PM EDT Mon Jul 4 2022/

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

.DAY ONE...This Afternoon and Tonight.

Weather hazards expected...

  Elevated Thunderstorm Risk...with an associated:
     Limited hail risk...up to 1 inch in diameter.
     Limited damaging wind risk...up to 70 mph.
  Elevated Flooding Risk.

DISCUSSION...

There is a chance of thunderstorms this afternoon, especially
along and south of I-80. If storms occur this afternoon, there would be
some limited risk for some of the storms to become severe. The threat
of severe weather appears a bit higher, albeit still limited,
tonight, especially after midnight and north of I-88 and I-290.

In addition, there is a chance of very heavy rainfall and
possible flash flooding tonight, mainly after midnight and north of
I-88 and I-290.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
  Limited Severe Thunderstorm Risk.
  Limited Flooding Risk.
  Significant Excessive Heat Risk.
Wednesday...
  Elevated Thunderstorm Risk.
  Limited Excessive Heat Risk.
Thursday...
  Limited Thunderstorm Risk.
  Limited Excessive Heat Risk.
Friday...
  Limited Thunderstorm Risk.

DISCUSSION:

Dangerous heat indices of 105 to 110 degrees are likely Tuesday
afternoon.

Multiple rounds of showers and thunderstorms are possible Tuesday
through Friday. Any one of these bouts of thunderstorms could
result in a risk of severe thunderstorms and the potential for
localized flash flooding.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed late this afternoon and tonight.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the east-southeast around 20 to 30 mph.

LMZ740>745-051700-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
1147 AM CDT Mon Jul 4 2022

This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.

.DAY ONE...This Afternoon and Tonight.

Weather hazards expected...

  Elevated Thunderstorm Risk...with an associated:
     Limited hail risk...up to 1 inch in diameter.
     Limited thunderstorm wind gust risk...up to 60 knots.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
  Limited Severe Thunderstorm Risk.
Wednesday through Friday...
  Limited Thunderstorm Risk.

Yack

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