729  
FLUS43 KLOT 240845  
HWOLOT  
 
HAZARDOUS WEATHER OUTLOOK  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
345 AM CDT TUE JUN 24 2025  
 
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-  
010-011-019-250845-  
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-  
345 AM CDT TUE JUN 24 2025 /445 AM EDT TUE JUN 24 2025/  
 
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL  
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.  
   
DAY ONE
 
TODAY AND TONIGHT.  
 
WEATHER HAZARDS EXPECTED...  
 
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:  
LEVEL 1 OF 5 DAMAGING WIND RISK...UP TO 60 MPH.  
LIMITED FLOODING RISK.  
ELEVATED EXCESSIVE HEAT RISK SOUTH OF I-80.  
 
DISCUSSION...  
 
SCATTERED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EVENING.  
IN ADDITION TO FREQUENT LIGHTNING, THE STRONGEST STORMS MAY BE  
CAPABLE OF LOCALIZED DAMAGING WINDS AND FLOODING.  
 
AFTERNOON HEAT INDICES OF 100 TO 105 DEGREES ARE EXPECTED AGAIN  
TODAY IN AREAS SOUTH OF I-80.  
   
DAYS TWO THROUGH SEVEN
 
WEDNESDAY THROUGH MONDAY.  
 
WEDNESDAY AND THURSDAY...  
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:  
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.  
LIMITED FLOODING RISK.  
LIMITED EXCESSIVE HEAT RISK.  
 
FRIDAY...  
LIMITED THUNDERSTORM RISK.  
LIMITED EXCESSIVE HEAT RISK.  
 
SATURDAY THROUGH MONDAY...  
LIMITED THUNDERSTORM RISK.  
 
DISCUSSION...  
 
PERIODIC THUNDERSTORM CHANCES WILL CONTINUE THROUGH EARLY NEXT  
WEEK. THE STRONGEST STORMS MAY BE CAPABLE OF PRODUCING DAMAGING  
WINDS AND LOCALIZED FLOODING.  
   
SPOTTER INFORMATION STATEMENT
 
 
SPOTTERS MAY BE NEEDED THIS AFTERNOON AND EVENING.  
 
GENERAL STORM MOTION OF THE DAY:  
 
MOVING TOWARD THE NORTHEAST AT 30 MPH.  
 

 
 
LMZ740>745-250845-  
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-  
345 AM CDT TUE JUN 24 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.  
 
WEATHER HAZARDS EXPECTED...  
 
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:  
LEVEL 1 OF 5 THUNDERSTORM WIND GUST RISK...UP TO 50 KNOTS.  
   
DAYS TWO THROUGH SEVEN
 
WEDNESDAY THROUGH MONDAY.  
 
WEDNESDAY AND THURSDAY...  
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:  
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.  
FRIDAY THROUGH MONDAY...  
LIMITED THUNDERSTORM RISK.  
 

 
 
PETR  
 
VISIT US AT WWW.WEATHER.GOV/CHICAGO  
 
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