211
FLUS43 KLOT 250821
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
321 AM CDT Fri Jul 25 2025

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-260830-
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-
321 AM CDT Fri Jul 25 2025 /421 AM EDT Fri Jul 25 2025/

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

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Limited Thunderstorm Risk...with an associated:
     Level 1 of 5 Damaging Wind Risk...up to 60 mph.
  Elevated Flooding Risk.

DISCUSSION...

Thunderstorms southeast of Interstate 57 will shift east of the
area not long after daybreak.

Periodic thunderstorms this afternoon and again later tonight will bring
the chance for torrential rainfall and localized flooding,
particularly late tonight.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday...
  Limited Flooding Risk.
  Elevated Thunderstorm Risk...with an associated:
     Level 1 of 5 Severe Thunderstorm Risk.
Sunday...
  Elevated Excessive Heat Risk.
Monday...
  Elevated Excessive Heat Risk.
Tuesday...
  Limited Thunderstorm Risk.
  Elevated Excessive Heat Risk.
Wednesday...
  Limited Thunderstorm Risk.

DISCUSSION...

Lingering thunderstorms Saturday will bring the
chance for torrential rainfall and localized flooding,
particularly Saturday morning.

Heat and humidity may once again build to dangerous levels at
times Sunday through Tuesday.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed late today or tonight.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the northeast at 20 to 25 mph.

$$

LMZ740>745-260830-
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-
321 AM CDT Fri Jul 25 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...Today and Tonight.

Weather hazards expected...

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

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday...
  Elevated Thunderstorm Risk...with an associated:
     Level 1 of 5 Severe Thunderstorm Risk.
Wednesday...
  Limited Thunderstorm Risk.

$$

KMD

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