605
FLUS43 KLOT 280909
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
409 AM CDT MON APR 28 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-290915-
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-
409 AM CDT MON APR 28 2025 /509 AM EDT MON APR 28 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 TONIGHT...WITH AN ASSOCIATED:
LEVEL 2 OF 5 DAMAGING WIND RISK...UP TO 60 MPH.
LEVEL 2 OF 5 LARGE HAIL RISK...UP TO HALF DOLLAR SIZE.
LEVEL 2 OF 5 TORNADO RISK.
ELEVATED NON THUNDERSTORM WIND RISK.
DISCUSSION...
SOUTH TO SOUTHWESTERLY WINDS WILL BECOME GUSTY UP TO 40 TO 45 MPH
THIS AFTERNOON AND EVENING.
THERE IS A 15 PERCENT CHANCE OF AN ISOLATED THUNDERSTORM NORTH OF
A MENDOTA TO MCHENRY LINE THIS MORNING. PRIMARY HAZARDS INCLUDE
LIGHTNING AND SMALL HAIL.
THERE REMAINS A CONDITIONAL THREAT OF THUNDERSTORMS LATE THIS
EVENING AND OVERNIGHT AS A COLD FRONT MOVES THROUGH THE REGION.
ANY STORMS THAT DEVELOP WOULD HAVE THE POTENTIAL TO BE STRONG TO
SEVERE.
DAYS TWO THROUGH SEVEN
TUESDAY THROUGH SUNDAY.
TUESDAY...
LIMITED THUNDERSTORM RISK SOUTH OF I-80...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
WEDNESDAY NIGHT AND THURSDAY...
LIMITED THUNDERSTORM RISK.
SPOTTER INFORMATION STATEMENT
SPOTTER REPORTS MAY BE NEEDED TONIGHT.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST AT 50 TO 60 MPH
LMZ740>745-290915-
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-
409 AM CDT MON APR 28 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...
GALE FORCE WINDS AND VERY HAZARDOUS WAVES.
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
THUNDERSTORM WATERSPOUT RISK
LEVEL 2 OF 5 THUNDERSTORM WIND GUST RISK...UP TO 50 KNOTS.
LEVEL 2 OF 5 HAIL RISK...UP TO QUARTER SIZE.
DAYS TWO THROUGH SEVEN
TUESDAY THROUGH SUNDAY.
TUESDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
GALE FORCE WINDS AND HAZARDOUS WAVES ILLINOIS SHORES
THIS AFTERNOON AND TONIGHT.
LIMITED THUNDERSTORM RISK.
WEDNESDAY...
LIMITED THUNDERSTORM RISK.
KJB
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