FLUS43 KLOT 122102

HWOLOT



Hazardous Weather Outlook

National Weather Service Chicago/Romeoville IL

302 PM CST Fri Dec 12 2025



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

010-011-019-132115-

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-

302 PM CST Fri Dec 12 2025 /402 PM EST Fri Dec 12 2025/



This Hazardous Weather Outlook is for portions of north central

Illinois...northeast Illinois and northwest Indiana.



.DAY ONE...Tonight.



Weather hazards expected...



  Limited Excessive Cold Risk.



DISCUSSION...



Cold conditions are expected tonight, with wind chill values as 

low as 15 below zero late tonight across interior northern 

Illinois. 



.DAYS TWO THROUGH SEVEN...Saturday through Thursday.



Saturday...

  Elevated Snow Risk, mainly south of I-80.

Saturday through early Monday morning...

  Elevated Excessive Cold Risk.



DISCUSSION...



Bitterly cold conditions are expected this weekend. The coldest

temperatures and wind chills are expected to occur Saturday

night into Sunday morning, when wind chills colder than 20 below 

zero are possible.



Another round of snow is likely on Saturday, currently favoring 

areas south of Interstate 80. 



.SPOTTER INFORMATION STATEMENT...



  Spotter activation will not be necessary through tonight.



$$



LMZ740>745-132115-

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-

302 PM CST Fri Dec 12 2025



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.



Weather hazards expected...



  Hazardous conditions for small craft.

  Elevated Freezing Spray Risk, mainly east of Calumet Harbor.



.DAYS TWO THROUGH SEVEN...Saturday through Thursday.



Saturday and Sunday...

  Hazardous conditions for small craft.

  Elevated Freezing Spray Risk, mainly east of Calumet Harbor.

Monday through Thursday...

  Hazardous conditions for small craft are likely.



$$



DK



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