745
FLUS43 KLOT 210845
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
345 AM CDT FRI AUG 21 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-220845-
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 AM CDT FRI AUG 21 2026 /445 AM EDT FRI AUG 21 2026/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
DAY ONE
TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED...
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 TORNADO RISK.
LEVEL 2 OF 5 DAMAGING WIND RISK...UP TO 60 MPH.
LEVEL 2 OF 5 LARGE HAIL RISK...UP TO HALF DOLLAR SIZE.
DISCUSSION...
SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED THIS AFTERNOON
AND EVENING. A FEW STORMS COULD BECOME SEVERE WITH DAMAGING WIND
GUSTS AND HAIL THE MAIN THREAT, BUT AN ISOLATED TORNADO CANNOT BE
RULED OUT. THE GREATEST SEVERE THREAT IS FAVORED WEST OF THE FOX
VALLEY AND NORTH OF INTERSTATE 80.
DAYS TWO THROUGH SEVEN
SATURDAY THROUGH THURSDAY.
SATURDAY...
LIMITED THUNDERSTORM RISK.
HIGH SWIM RISK PORTER COUNTY, IN LAKE MICHIGAN BEACHES.
SUNDAY...
HIGH SWIM RISK LAKE MICHIGAN BEACHES.
TUESDAY NIGHT AND WEDNESDAY...
LIMITED THUNDERSTORM RISK.
DISCUSSION...
ISOLATED TO WIDELY SCATTERED SHOWERS AND THUNDERSTORMS ARE
POSSIBLE ON SATURDAY, BUT NO SEVERE WEATHER IS EXPECTED.
BREEZY NORTH-NORTHWEST WINDS WILL RESULT IN BUILDING WAVES AND
DANGEROUS RIP CURRENTS AT SOUTHERN LAKE MICHIGAN BEACHES SATURDAY
AFTERNOON THROUGH SUNDAY.
SPOTTER INFORMATION STATEMENT
SPOTTERS MAY BE NEEDED THIS AFTERNOON AND EVENING.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST-SOUTHEAST AT 20 TO 30 MPH.
LMZ740>745-220845-
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 AM CDT FRI AUG 21 2026
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...
ELEVATED 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 HALF DOLLAR SIZE.
DAYS TWO THROUGH SEVEN
SATURDAY THROUGH THURSDAY.
SATURDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
LIMITED THUNDERSTORM RISK.
SUNDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
TUESDAY NIGHT AND WEDNESDAY...
LIMITED THUNDERSTORM RISK.
YACK
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