287
FLUS43 KLOT 162037
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
337 PM CDT Wed Jul 16 2025

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-172045-
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-
337 PM CDT Wed Jul 16 2025 /437 PM EDT Wed Jul 16 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 70 mph.

DISCUSSION...

A line of strong to severe thunderstorms producing damaging winds
will affect areas from the Chicago metro and points south and east
through the early evening.

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

Thursday...
  High Swim Risk Lake Michigan Beaches.
Friday Night...
  Limited Thunderstorm Risk.
Saturday...
  Elevated Thunderstorm Risk.
  Elevated Flooding Risk.
Sunday and Monday...
  Limited Thunderstorm Risk.
Tuesday...
  Limited Thunderstorm Risk.
  Elevated Excessive Heat Risk.

DISCUSSION...

High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through early Friday morning.

There will be periodic bouts of showers and thunderstorms
Friday night through Tuesday. Any storms during this period may be
strong to severe with damaging winds and flash flooding.

Dangerous heat and humidity may arrive midweek next week.

.SPOTTER INFORMATION STATEMENT...

  Spotters will be needed through early this evening.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the east-northeast at 30 to 40 mph.

$$

LMZ740>745-172045-
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-
337 PM CDT Wed Jul 16 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 2 of 5 Thunderstorm Wind Gust Risk...up to 55 knots.

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

Thursday...
  Hazardous conditions for small craft are likely.
Friday Night...
  Limited Thunderstorm Risk.
Saturday...
  Elevated Thunderstorm Risk.
Monday and Tuesday...
  Limited Thunderstorm Risk.

$$

Castro

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