993  
FLUS43 KLOT 220837  
HWOLOT  
 
HAZARDOUS WEATHER OUTLOOK  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
337 AM CDT TUE JUL 22 2025  
 
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-  
010-011-019-230845-  
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-  
337 AM CDT TUE JUL 22 2025 /437 AM EDT TUE JUL 22 2025/  
 
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL  
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.  
   
DAY ONE  
TODAY AND TONIGHT.  
 
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.  
   
DAYS TWO THROUGH SEVEN  
WEDNESDAY THROUGH MONDAY.  
 
WEDNESDAY AND THURSDAY...  
SIGNIFICANT EXCESSIVE HEAT RISK.  
THURSDAY NIGHT...  
LIMITED FLOODING RISK.  
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:  
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.  
FRIDAY...  
ELEVATED THUNDERSTORM RISK.  
LIMITED FLOODING RISK.  
SATURDAY...  
LIMITED THUNDERSTORM RISK.  
LIMITED FLOODING RISK.  
SUNDAY AND MONDAY...  
LIMITED EXCESSIVE HEAT RISK.  
 
DISCUSSION...  
 
DANGEROUS HEAT AND HUMIDITY WITH HEAT INDEX VALUES UP TO AROUND  
110F ARE EXPECTED WEDNESDAY AND THURSDAY.  
   
SPOTTER INFORMATION STATEMENT  
 
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.  
 
 
 
LMZ740>745-230845-  
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-  
337 AM CDT TUE JUL 22 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  
TODAY AND TONIGHT.  
 
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.  
   
DAYS TWO THROUGH SEVEN  
WEDNESDAY THROUGH MONDAY.  
 
THURSDAY NIGHT...  
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:  
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.  
FRIDAY...  
ELEVATED THUNDERSTORM RISK.  
SATURDAY...  
LIMITED THUNDERSTORM RISK.  
 
 
 
KJB  
 
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