399
FLUS43 KLOT 290921
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
421 AM CDT SUN JUN 29 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-300930-
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-
421 AM CDT SUN JUN 29 2025 /521 AM EDT SUN JUN 29 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...WITH AN ASSOCIATED:
LEVEL 1 OF 5 DAMAGING WIND RISK...UP TO 50 TO 60 MPH.
LIMITED EXCESSIVE HEAT RISK.
DISCUSSION...
ISOLATED THUNDERSTORMS MAY DEVELOP THIS AFTERNOON AND CONTINUE
INTO THE EARLY EVENING, WITH A POSSIBLE FOCUS BEING NEAR THE LAKE
BREEZE IN NORTHEAST ILLINOIS. ISOLATED TO PERHAPS WIDELY SCATTERED
THUNDERSTORMS ARE THEN POSSIBLE IN THE LATE EVENING AND OVERNIGHT.
THE STRONGEST THUNDERSTORMS THROUGH TONIGHT MAY BE CAPABLE OF
PRODUCING LOCALIZED STRONG TO DAMAGING DOWNBURST WINDS.
HEAT INDICES THIS AFTERNOON AWAY FROM THE ILLINOIS SHORE WILL TOP
OUT AROUND 100 DEGREES.
DAYS TWO THROUGH SEVEN
MONDAY THROUGH SATURDAY.
MONDAY...
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
SATURDAY...
LIMITED THUNDERSTORM RISK.
LIMITED EXCESSIVE HEAT RISK.
SPOTTER INFORMATION STATEMENT
SPOTTER ACTIVATION IS UNLIKELY THROUGH TONIGHT, BUT ANY REPORTS
ARE APPRECIATED.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST-NORTHEAST AT 10 TO 15 MPH.
LMZ740>745-300930-
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-
421 AM CDT SUN JUN 29 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...
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 THUNDERSTORM WIND GUST RISK...UP TO 40 TO 50 KNOTS.
DAYS TWO THROUGH SEVEN
MONDAY THROUGH SATURDAY.
MONDAY...
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
SATURDAY...
LIMITED THUNDERSTORM RISK.
CASTRO
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