781
FLUS43 KLOT 150215
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
915 PM CDT Wed May 14 2025

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-160215-
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-
915 PM CDT Wed May 14 2025 /1015 PM EDT Wed May 14 2025/

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

.DAY ONE...Tonight.

Weather hazards expected...

  Limited Thunderstorm Risk.
  Elevated Fog Risk.

DISCUSSION...

Isolated thunderstorms may develop anywhere across the area
overnight. Any storm that develops may produce hail. The threat
of a thunderstorm at any given location is only 10 to 15 percent,
so most areas will remain dry.

Dense fog will continue spreading inland off Lake Michigan
overnight, especially in Lake and northern Cook counties in
northeastern Illinois.

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

Thursday...
  Elevated Thunderstorm Risk...with an associated:
     Level 3 of 5 Severe Thunderstorm Risk.
  Elevated Fire Weather Risk.
Friday...
  Limited Thunderstorm Risk...with an associated:
     Level 1 of 5 Severe Thunderstorm Risk.
  Significant Fire Weather Risk.
Tuesday...
  Limited Thunderstorm Risk.

DISCUSSION...

Isolated to scattered severe thunderstorms are expected to develop
Friday afternoon across northeastern Illinois and northwestern
Indiana, mainly east of Interstate 39. Any storm that develops may
produce destructive winds and hail, as well as a tornado.

Late Thursday afternoon into the early evening, elevated fire
danger may develop mainly along and west of Interstate 39.

On Friday, critical fire danger may develop areawide. In addition,
thunderstorms may develop during the afternoon with a threat for
damaging winds and hail.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the northeast at 15 mph.

$$

LMZ740>745-160215-
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-
915 PM CDT Wed May 14 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...

  Significant fog risk, especially along the Illinois shoreline.

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

Thursday...
  Elevated Thunderstorm Risk...with an associated:
     Level 3 of 5 Severe Thunderstorm Risk.
  Limited Fog Risk in the morning.
Friday...
  Hazardous conditions for small craft are likely.
  Limited Thunderstorm Risk...with an associated:
     Level 1 of 5 Severe Thunderstorm Risk.
Saturday and again on Tuesday...
  Hazardous conditions for small craft are likely.

$$

Borchardt

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