027  
FLUS43 KLOT 212018  
HWOLOT  
 
HAZARDOUS WEATHER OUTLOOK  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
318 PM CDT MON JUL 21 2025  
 
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-  
010-011-019-222030-  
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-  
318 PM CDT MON JUL 21 2025 /418 PM EDT MON JUL 21 2025/  
 
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL  
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.  
   
DAY ONE  
TONIGHT.  
 
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.  
   
DAYS TWO THROUGH SEVEN  
TUESDAY THROUGH SUNDAY.  
 
WEDNESDAY AND THURSDAY...  
SIGNIFICANT EXCESSIVE HEAT RISK.  
THURSDAY NIGHT...  
LIMITED THUNDERSTORM RISK.  
FRIDAY...  
LIMITED FLOODING RISK.  
LIMITED THUNDERSTORM RISK.  
ELEVATED EXCESSIVE HEAT RISK.  
SATURDAY...  
LIMITED THUNDERSTORM RISK.  
SUNDAY...  
LIMITED EXCESSIVE HEAT RISK.  
   
SPOTTER INFORMATION STATEMENT  
 
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.  
 
 
 
LMZ740>745-222030-  
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-  
318 PM CDT MON JUL 21 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.  
 
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.  
   
DAYS TWO THROUGH SEVEN  
TUESDAY THROUGH SUNDAY.  
 
THURSDAY NIGHT THROUGH SATURDAY...  
LIMITED THUNDERSTORM RISK.  
 
 
 
- IZZI  
 
VISIT US AT WWW.WEATHER.GOV/CHICAGO  
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