FLUS43 KLOT 182005
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
305 PM CDT Mon May 18 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-192015-
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-
305 PM CDT Mon May 18 2026 /405 PM EDT Mon May 18 2026/

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 overnight.

DISCUSSION...

Another line of thunderstorms is expected to approach the area 
from Iowa again toward daybreak Tuesday.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
   Limited Thunderstorm Risk...with an associated:
      Level 2 of 5 Severe Thunderstorm Risk.

Thunderstorms will develop in the afternoon, mainly south and east
of Interstate 55. Stronger storms will pose a damaging wind
threat.

.SPOTTER INFORMATION STATEMENT...

 Spotters will not be needed through tonight. 

GENERAL STORM MOTION OF THE DAY:

 Moving toward the northeast at 35 to 40 mph. 

$$

LMZ740>745-192015-
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-
305 PM CDT Mon May 18 2026

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 overnight.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
  Hazardous conditions for small craft are likely.
  Limited Thunderstorm Risk...with an associated:
     Level 2 of 5 Severe Thunderstorm Risk.
Friday through Sunday...
  Limited Thunderstorm Risk.

$$

KMD

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