910
FLUS43 KLOT 192244
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
544 PM CDT SAT JUL 19 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-202245-
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-
544 PM CDT SAT JUL 19 2025 /644 PM EDT SAT JUL 19 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 2 OF 5 DAMAGING WIND RISK...UP TO 60 MPH.
LEVEL 1 OF 5 LARGE HAIL RISK...UP TO QUARTER SIZE.
ELEVATED FLOODING RISK.
DISCUSSION...
SCATTERED THUNDERSTORMS AND LOCALLY HEAVY RAIN ARE POSSIBLE LATE
TONIGHT, MAINLY SOUTH OF I-80. A FEW STORMS COULD BE STRONG TO
SEVERE.
DAYS TWO THROUGH SEVEN
SUNDAY THROUGH FRIDAY.
SUNDAY...
ELEVATED FLOODING RISK.
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
HIGH SWIM RISK LAKE MICHIGAN BEACHES.
MONDAY...
LIMITED THUNDERSTORM RISK.
WEDNESDAY...
ELEVATED EXCESSIVE HEAT RISK.
THURSDAY...
LIMITED THUNDERSTORM RISK.
ELEVATED EXCESSIVE HEAT RISK.
FRIDAY...
LIMITED THUNDERSTORM RISK.
LIMITED EXCESSIVE HEAT RISK.
DISCUSSION...
THUNDERSTORMS WITH TORRENTIAL RAIN AND LOCALIZED FLASH FLOODING
MAY PERSIST SOUTH OF I-80 ON SUNDAY.
BUILDING WAVES ON LAKE MICHIGAN LATE TONIGHT THROUGH SUNDAY WILL
RESULT IN DANGEROUS SWIMMING CONDITIONS AT NORTHEAST IL BEACHES.
DANGEROUS HEAT AND HUMIDITY ARE POSSIBLE THE MIDDLE OF NEXT WEEK.
SPOTTER INFORMATION STATEMENT
SPOTTERS ACTIVATION IS NOT EXPECTED AT THIS TIME.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST-SOUTHEAST AT 40 MPH.
LMZ740>745-202245-
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-
544 PM CDT SAT JUL 19 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...WITH AN ASSOCIATED:
LEVEL 1 OF 5 THUNDERSTORM WIND GUST RISK...UP TO 50 KNOTS.
DAYS TWO THROUGH SEVEN
SUNDAY THROUGH FRIDAY.
SUNDAY...
LIMITED THUNDERSTORM RISK.
THURSDAY AND FRIDAY...
LIMITED THUNDERSTORM RISK.
YACK
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