652
FLUS43 KLOT 092009
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
309 PM CDT Sat Aug 9 2025

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-102015-
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-
309 PM CDT Sat Aug 9 2025 /409 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.
  Limited Flooding Risk.

DISCUSSION...

Scattered thunderstorms are expected through early to mid evening
north and west of I-55. A couple of the stronger storms could
produce very localized wind gusts up to around 60 mph, mainly
west of a Crystal Lake to LaSalle Peru line. Thunderstorms will
also be capable of producing torrential downpours, which could
lead to an isolated flash flood threat.

There is a chance that some thunderstorms could continue into the
overnight hours.

.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 through mid evening.

GENERAL STORM MOTION OF THE DAY:

 Moving toward the northeast at 15 to 20 mph.

$$

LMZ740>745-102015-
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-
309 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...

  Hazardous conditions for small craft.
  Limited 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.

$$

- Izzi

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