486  
FLUS43 KLOT 301657  
HWOLOT  
 
HAZARDOUS WEATHER OUTLOOK  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
1157 AM CDT SUN MAR 30 2025  
 
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-  
010-011-019-311700-  
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-  
1157 AM CDT SUN MAR 30 2025 /1257 PM EDT SUN MAR 30 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...  
 
SIGNIFICANT THUNDERSTORM RISK THIS AFTERNOON...WITH AN ASSOCIATED:  
LEVEL 2 OF 5 TORNADO RISK.  
LEVEL 3 OF 5 DAMAGING WIND RISK...UP TO 75 MPH.  
LEVEL 3 OF 5 LARGE HAIL RISK...UP TO 2 INCH DIAMETER.  
 
DISCUSSION...  
 
SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON PRIMARILY AROUND  
AND SOUTHEAST OF A LINE FROM LA SALLE COUNTY TO THE NORTHERN  
CHICAGO SUBURBS. ALL MODES OF SEVERE WEATHER ARE POSSIBLE,  
INCLUDING LARGE HAIL, DAMAGING WINDS AND TORNADOES.  
   
DAYS TWO THROUGH SEVEN  
MONDAY THROUGH SATURDAY.  
 
TUESDAY NIGHT...  
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:  
LEVEL 2 OF 5 SEVERE THUNDERSTORM RISK.  
WEDNESDAY...  
LIMITED FLOODING RISK.  
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:  
LEVEL 3 OF 5 SEVERE THUNDERSTORM RISK.  
 
DISCUSSION...  
 
PERIODS OF THUNDERSTORMS ARE POSSIBLE LATE TUESDAY NIGHT INTO  
WEDNESDAY ACROSS THE ENTIRE AREA. SOME OF THESE THUNDERSTORMS  
MAY BECOME SEVERE. HEAVY RAIN AND LOCALIZED FLOODING WILL ALSO  
BE POSSIBLE.  
   
SPOTTER INFORMATION STATEMENT  
 
SPOTTERS WILL LIKELY BE NEEDED THROUGH LATE THIS AFTERNOON.  
 
GENERAL STORM MOTION OF THE DAY:  
 
MOVING TOWARD THE NORTHEAST AT 50 TO 60 MPH.  
 
 
 
LMZ740>745-311700-  
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-  
1157 AM CDT SUN MAR 30 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  
THIS AFTERNOON AND TONIGHT.  
 
WEATHER HAZARDS EXPECTED...  
 
HAZARDOUS CONDITIONS FOR SMALL CRAFT.  
SIGNIFICANT THUNDERSTORM RISK...WITH AN ASSOCIATED:  
THUNDERSTORM WATERSPOUT RISK  
LEVEL 3 OF 5 THUNDERSTORM WIND GUST RISK...UP TO 60 KT.  
LEVEL 2 OF 5 HAIL RISK...UP TO 2 INCH DIAMETER.  
   
DAYS TWO THROUGH SEVEN  
MONDAY THROUGH SATURDAY.  
 
MONDAY AND TUESDAY...  
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.  
WEDNESDAY...  
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.  
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:  
LEVEL 3 OF 5 SEVERE THUNDERSTORM RISK.  
 
 
 
KLUBER  
 
VISIT US AT WWW.WEATHER.GOV/CHICAGO  
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