333 

FLUS43 KLOT 291915

HWOLOT



Hazardous Weather Outlook

National Weather Service Chicago/Romeoville IL

215 PM CDT Mon Jun 29 2026



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

010-011-019-301915-

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-

215 PM CDT Mon Jun 29 2026 /315 PM EDT Mon Jun 29 2026/



This Hazardous Weather Outlook is for portions of north central

Illinois...northeast Illinois and northwest Indiana.



.DAY ONE...Tonight.



Weather hazards expected...



  Elevated Excessive Heat Risk.



DISCUSSION...



Oppressive heat will continue into this evening, especially in the

city of Chicago where heat indices will likely not drop below 90

until around midnight.



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



Tuesday and Wednesday...

  Significant Excessive Heat Risk.

Thursday...

  Elevated Excessive Heat Risk.

Thursday night through Saturday...

  Limited Flooding Risk.

  Limited Thunderstorm Risk.

  Limited Excessive Heat Risk.

Sunday...

  Limited Thunderstorm Risk.



DISCUSSION...



Dangerous heat will persist through Wednesday or Thursday. 

Thunderstorm chances will increase late Thursday and continue at 

times through the holiday weekend. 



.SPOTTER INFORMATION STATEMENT...



  Spotter activation will not be necessary through tonight.



$$



LMZ740>745-301915-

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-

215 PM CDT Mon Jun 29 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...Tonight.



  No hazardous weather is expected at this time.



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



Thursday through Sunday...

  Limited Thunderstorm Risk.



$$



- Izzi



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