FLUS43 KLOT 160808
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
308 AM CDT Thu Apr 16 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-170815-
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-
308 AM CDT Thu Apr 16 2026 /408 AM EDT Thu Apr 16 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.
  Limited Fog Risk Tonight.

DISCUSSION...

Any isolated non-severe thunderstorms through early to mid
afternoon may produce locally heavy downpours, mainly north of
Interstate 80.

The potential exists for some dense fog this evening and
overnight, particularly closer to Lake Michigan.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday...
  Elevated Thunderstorm Risk...with an associated:
     Level 3 of 5 Severe Thunderstorm Risk.
  Elevated Flooding Risk.
Sunday...
  Elevated Frost and Freeze Risk.

DISCUSSION...

A line of thunderstorms is expected to move across the area late
Friday afternoon through Friday night, some of which could be
severe, especially near and west of Interstate-39.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the northeast at 30 mph early this morning then
  moving toward the east southeast.

$$

LMZ740>745-170815-
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-
308 AM CDT Thu Apr 16 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.
  Elevated Fog Risk.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday...
  Hazardous conditions for small craft are likely.
  Elevated Thunderstorm Risk...with an associated:
     Level 1 of 5 Severe Thunderstorm Risk.
Saturday through Tuesday...
  Hazardous conditions for small craft are likely.

$$

Petr

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