FLUS43 KLOT 221555
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1055 AM CDT Sat Aug 22 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-231600-
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-
1055 AM CDT Sat Aug 22 2026 /1155 AM EDT Sat Aug 22 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.
  High Swim Risk Lake Michigan Beaches.

DISCUSSION...

Isolated to widely scattered showers and thunderstorms are
possible near and south of Lake Michigan today into tonight. No 
severe weather is expected. 

Dangerous swimming conditions are present at Porter County Lake
Michigan beaches today. Similarly hazardous conditions will
develop at Cook County and Lake County Indiana beaches late
tonight.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday...
  High Swim Risk Lake Michigan Beaches.
Tuesday Night through Thursday...
  Limited Thunderstorm Risk.

DISCUSSION...

Dangerous swimming conditions are expected at Cook County and
northwest Indiana Lake Michigan beaches on Sunday.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the south-southeast a 25 mph.

$$

LMZ740>745-231600-
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-
1055 AM CDT Sat Aug 22 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...

  Hazardous conditions for small craft.
  Limited Thunderstorm Risk.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday...
  Hazardous conditions for small craft are likely.
Tuesday Night through Thursday...
  Limited Thunderstorm Risk.

$$

Doom

Visit us at www.weather.gov/chicago