421  
FLUS43 KLOT 260232 AAA  
HWOLOT  
 
HAZARDOUS WEATHER OUTLOOK...UPDATED  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
932 PM CDT WED JUN 25 2025  
 
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-  
010-011-019-270245-  
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-  
932 PM CDT WED JUN 25 2025 /1032 PM EDT WED JUN 25 2025/  
 
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL  
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.  
   
DAY ONE  
TONIGHT.  
 
WEATHER HAZARDS EXPECTED...  
 
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:  
LEVEL 1 OF 5 DAMAGING WIND RISK...UP TO 60 MPH.  
LIMITED FLOODING RISK.  
LIMITED FOG RISK ILLINOIS LAKE MICHIGAN SHORE.  
 
DISCUSSION...  
 
ISOLATED THUNDERSTORMS ARE POSSIBLE OVERNIGHT, ESPECIALLY  
NORTH OF INTERSTATE 80. THE STRONGEST STORMS WILL BE CAPABLE  
OF PRODUCING GUSTY TO LOCALLY DAMAGING WIND GUSTS AS WELL AS  
HEAVY DOWNPOURS.  
 
PATCHY DENSE FOG WILL BE POSSIBLE NEAR THE LAKE MICHIGAN  
SHORE IN NORTHEAST ILLINOIS.  
   
DAYS TWO THROUGH SEVEN  
THURSDAY THROUGH TUESDAY.  
 
THURSDAY...  
LIMITED FLOODING RISK.  
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:  
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.  
LIMITED EXCESSIVE HEAT RISK.  
FRIDAY THROUGH SUNDAY...  
LIMITED THUNDERSTORM RISK.  
LIMITED EXCESSIVE HEAT RISK.  
MONDAY...  
LIMITED THUNDERSTORM RISK.  
 
DISCUSSION...  
 
PERIODIC THUNDERSTORM CHANCES WILL CONTINUE THROUGH EARLY NEXT  
WEEK. HEAT INDICES WILL APPROACH OR EXCEED 100 DEGREES AT TIMES,  
MOST NOTABLY ON FRIDAY AND SUNDAY.  
   
SPOTTER INFORMATION STATEMENT  
 
SPOTTERS MAY BE NEEDED OVERNIGHT NORTH OF INTERSTATE 80.  
 
GENERAL STORM MOTION OF THE DAY:  
 
MOVING TOWARD THE EAST AT 25 TO 35 MPH.  
 
 
 
LMZ740>745-270245-  
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-  
932 PM CDT WED JUN 25 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...  
 
LIMITED THUNDERSTORM RISK.  
ELEVATED FOG RISK ILLINOIS NEARSHORE.  
   
DAYS TWO THROUGH SEVEN  
THURSDAY THROUGH TUESDAY.  
 
THURSDAY...  
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:  
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.  
FRIDAY THROUGH MONDAY...  
LIMITED THUNDERSTORM RISK.  
 
 
 
VISIT US AT WWW.WEATHER.GOV/CHICAGO  
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