FLUS43 KLOT 041819

HWOLOT



Hazardous Weather Outlook

National Weather Service Chicago/Romeoville IL

119 PM CDT Tue Aug 4 2026



ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-

010-011-019-051830-

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-

119 PM CDT Tue Aug 4 2026 /219 PM EDT Tue Aug 4 2026/



This Hazardous Weather Outlook is for portions of north central

Illinois...northeast Illinois and northwest Indiana.



.DAY ONE...This Afternoon and Tonight.



Weather hazards expected...



  Limited Thunderstorm Risk.

  Limited Flooding Risk.



DISCUSSION...



A few non severe storms may impact northwestern Illinois this evening

and overnight. 



.DAYS TWO THROUGH SEVEN...Wednesday through Monday.



Wednesday...

  Elevated  Thunderstorm Risk...with an associated:

     Level 1 of 5 Severe Thunderstorm Risk.

     Elevated Flooding Risk.

Thursday...

  Limited Flooding Risk.

  Limited Thunderstorm Risk.

Saturday and Sunday...

  Limited Flooding Risk.

  Limited Thunderstorm Risk.



DISCUSSION...



Clusters of thunderstorms are possible Wednesday into Thursday.

These storms may result in locally heavy rainfall and localized

flooding.



.SPOTTER INFORMATION STATEMENT...



  Spotter activation will not be necessary through tonight.



GENERAL STORM MOTION OF THE DAY:



  Moving toward the east northeast at 30 to 35 mph. 



$$



LMZ740>745-051830-

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-

119 PM CDT Tue Aug 4 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...This Afternoon and Tonight.



Weather hazards expected...



  Limited Thunderstorm Risk.



.DAYS TWO THROUGH SEVEN...Wednesday through Monday.



Wednesday...

  Elevated Thunderstorm Risk.

Sunday and Monday...

  Limited Thunderstorm Risk.



$$



Borchardt



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