FLUS43 KLOT 181530
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1030 AM CDT Mon May 18 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-191530-
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-
1030 AM CDT Mon May 18 2026 /1130 AM 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...with an associated:
     Level 2 of 5 Damaging Wind Risk...up to 60 mph.
     Level 1 of 5 Large Hail Risk...up to quarter size.

DISCUSSION...

Thunderstorms are likely near and east of I-55 through early 
afternoon. A few of the storms could become severe, capable of 
producing locally damaging winds over 60 mph. 

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.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed through early this afternoon.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the northeast at 45 to 55 mph. 

$$

LMZ740>745-191530-
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-
1030 AM 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...with an associated:
     Level 2 of 5 Thunderstorm Wind Gust Risk...up to 50 knots.
     Level 1 of 5 Hail Risk...up to 1 inch in diameter.

.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.

$$

- Izzi

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