675
FLUS43 KLOT 100120 AAA
HWOLOT

Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
820 PM CDT Sat Aug 9 2025

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-110130-
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-
820 PM CDT Sat Aug 9 2025 /920 PM EDT Sat Aug 9 2025/

This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

  Elevated Thunderstorm Risk...with an associated:
     Level 2 of 5 Damaging Wind Risk...up to 60 mph.
  Elevated Flooding Risk.

DISCUSSION...

Scattered thunderstorms are expected northwest of Interstate 55
tonight. A few of these thunderstorms may be strong to severe
with locally damaging winds the primary severe weather threat.

Torrential rain will also be possible with these thunderstorms
which may allow for localized flash flooding. The highest risk
of flooding appears to be across far northern Illinois, along
and north of Interstate 90, where thunderstorms may move over
the same areas overnight.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday and Monday...
  Elevated Flooding Risk.
  Elevated Thunderstorm Risk.
Tuesday and Wednesday...
  Limited Flooding Risk.
  Limited Thunderstorm Risk.

DISCUSSION...

There will be periodic chances of thunderstorms Sunday through
Wednesday. Thunderstorms will be capable of producing torrential
downpours with some threat for localized flash flooding.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the northeast at 20 mph.

$$

LMZ740>745-110130-
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-
820 PM CDT Sat Aug 9 2025

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...Tonight.

Weather hazards expected...

  Elevated Thunderstorm Risk...with an associated:
     Level 1 of 5 Thunderstorm Wind Gust Risk...up to 40 kt.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday through Tuesday...
  Limited Thunderstorm Risk.

$$

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