096
FLUS43 KLOT 162045
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
345 PM CDT SAT AUG 16 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-172045-
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-
345 PM CDT SAT AUG 16 2025 /445 PM EDT SAT AUG 16 2025/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
DAY ONE
TONIGHT.
WEATHER HAZARDS EXPECTED...
SIGNIFICANT THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 2 OF 5 DAMAGING WIND RISK...UP TO 70 MPH.
LEVEL 2 OF 5 LARGE HAIL RISK...UP TO 1 INCH IN DIAMETER.
ELEVATED FLOODING RISK.
ELEVATED EXCESSIVE HEAT RISK THROUGH EARLY EVENING SOUTH OF I-80.
DISCUSSION...
CLUSTERS OF THUNDERSTORMS WILL MOVE ACROSS THE AREA INTO THIS
EVENING. DAMAGING WINDS WILL BE THE PRIMARY THREAT, WHICH MAY
LOCALLY EXCEED 70 MPH, THOUGH SOME INSTANCES OF LARGE HAIL ARE
ALSO POSSIBLE. ADDITIONAL THUNDERSTORMS MAY DEVELOP INTO TONIGHT
WITH A THREAT FOR FLASH FLOODING.
DAYS TWO THROUGH SEVEN
SUNDAY THROUGH FRIDAY.
SUNDAY...
HIGH SWIM RISK DEVELOPING LAKE MICHIGAN BEACHES.
LIMITED THUNDERSTORM RISK.
LIMITED EXCESSIVE HEAT RISK.
MONDAY...
LIMITED FLOODING RISK.
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
ELEVATED EXCESSIVE HEAT RISK.
TUESDAY...
LIMITED FLOODING RISK.
LIMITED THUNDERSTORM RISK.
SPOTTER INFORMATION STATEMENT
SPOTTERS MAY BE NEEDED INTO THIS EVENING.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE SOUTH AT 35 TO 40 MPH.
LMZ740>745-172045-
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-
345 PM CDT SAT AUG 16 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...
SIGNIFICANT THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 THUNDERSTORM WIND GUST RISK...UP TO 60 KNOTS.
LEVEL 2 OF 5 HAIL RISK...UP TO QUARTER SIZE.
DAYS TWO THROUGH SEVEN
SUNDAY THROUGH FRIDAY.
SUNDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
LIMITED THUNDERSTORM RISK.
MONDAY...
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
TUESDAY...
LIMITED THUNDERSTORM RISK.
TUESDAY NIGHT AND WEDNESDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
KJB
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