383
FLUS43 KLOT 250221
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
921 PM CDT THU JUL 24 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-260600-
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-
921 PM CDT THU JUL 24 2025 /1021 PM EDT THU JUL 24 2025/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
DAY ONE
TONIGHT.
WEATHER HAZARDS EXPECTED...
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 DAMAGING WIND RISK...UP TO 60 MPH.
ELEVATED FLOODING RISK.
DISCUSSION...
ISOLATED NON-SEVERE THUNDERSTORMS ARE POSSIBLE THIS EVENING ALONG
AND SOUTH OF A PERU TO WAUKEGAN, ILLINOIS LINE. PRIMARY THREATS
INCLUDE A FEW LIGHTNING STRIKES AND LOCALIZED HEAVY DOWNPOURS.
ADDITIONAL STORMS ARE LIKELY LATE TONIGHT INTO FRIDAY MORNING,
ESPECIALLY ALONG AND SOUTH OF INTERSTATE 80. PRIMARY HAZARDS
INCLUDE GUSTY TO LOCALLY DAMAGING WIND GUSTS ALONG WITH HEAVY
RAINFALL WHICH MAY LEAD LOCALIZED FLASH FLOODING.
DAYS TWO THROUGH SEVEN
FRIDAY THROUGH WEDNESDAY.
FRIDAY...
ELEVATED FLOODING RISK.
LIMITED THUNDERSTORM RISK.
SATURDAY...
LIMITED FLOODING RISK.
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
SUNDAY...
LIMITED THUNDERSTORM RISK.
LIMITED EXCESSIVE HEAT RISK.
MONDAY...
LIMITED THUNDERSTORM RISK.
ELEVATED EXCESSIVE HEAT RISK.
DISCUSSION...
PERIODIC THUNDERSTORMS FRIDAY THROUGH SATURDAY WILL BRING THE
CHANCE FOR TORRENTIAL RAINFALL AND LOCALIZED FLOODING,
PARTICULARLY LATE FRIDAY NIGHT INTO SATURDAY MORNING.
HEAT AND HUMIDITY MAY ONCE AGAIN BUILD TO DANGEROUS LEVELS AT
TIMES SUNDAY THROUGH TUESDAY.
SPOTTER INFORMATION STATEMENT
SPOTTERS MAY BE NEEDED LATE TONIGHT, MAINLY SOUTH OF I-80.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST NORTHEAST AROUND 25 MPH.
LMZ740>745-260600-
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-
921 PM CDT THU JUL 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
TONIGHT.
WEATHER HAZARDS EXPECTED...
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 THUNDERSTORM WIND GUST RISK...UP TO 50 KNOTS.
DAYS TWO THROUGH SEVEN
FRIDAY THROUGH WEDNESDAY.
FRIDAY...
LIMITED THUNDERSTORM RISK.
SATURDAY...
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
WEDNESDAY...
LIMITED THUNDERSTORM RISK.
PETR
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