622
FLUS43 KLOT 171647
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1147 AM CDT WED JUN 17 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-181700-
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-
1147 AM CDT WED JUN 17 2026 /1247 PM EDT WED JUN 17 2026/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
DAY ONE
THIS AFTERNOON AND TONIGHT.
WEATHER HAZARDS EXPECTED...
SIGNIFICANT THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 4 OF 5 TORNADO RISK.
LEVEL 3 OF 5 DAMAGING WIND RISK...UP TO 80 MPH.
LEVEL 2 OF 5 LARGE HAIL RISK...UP TO GOLF BALL SIZE.
SIGNIFICANT FLOODING RISK.
ELEVATED NON-THUNDERSTORM WIND RISK.
HIGH SWIM RISK ILLINOIS LAKE MICHIGAN BEACHES.
DISCUSSION...
SCATTERED SHOWERS AND LARGELY NON-SEVERE THUNDERSTORMS WIL
CONTINUE THROUGH THE MORNING. SEVERE WIND GUSTS MAY BE POSSIBLE
WITH MORNING THUNDERSTORMS NEAR AND SOUTH OF THE US 24 CORRIDOR.
NON-THUNDERSTORM WINDS IN THE WAKE OF STORMS MAY GUST AS HIGH AS
50 MPH AT TIMES INTO EARLY AFTERNOON NORTH OF I-80.
ADDITIONAL THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EARLY
EVENING. THE STRONGEST STORMS, CURRENTLY FAVORED SOUTH OF I-80,
WILL BE CAPABLE OF PRODUCING LARGE HAIL, DESTRUCTIVE WINDS, AND
STRONG TORNADOES. FARTHER NORTH, DAMAGING WINDS WILL BE THE
BIGGEST CONCERN WITH AFTERNOON STORMS.
THUNDERSTORMS TODAY WILL ALSO BE CAPABLE OF PRODUCING TORRENTIAL
RAINFALL WHICH COULD LEAD TO LOCALIZED FLASH FLOODING AND SUDDEN
RIVER/STREAM RISES.
DAYS TWO THROUGH SEVEN
THURSDAY THROUGH TUESDAY.
THURSDAY...
HIGH SWIM RISK PORTER COUNTY LAKE MICHIGAN BEACHES.
SATURDAY...
LIMITED THUNDERSTORM RISK.
SUNDAY...IF
LIMITED FLOODING RISK.
LIMITED THUNDERSTORM RISK.
MONDAY AND TUESDAY...
LIMITED THUNDERSTORM RISK.
SPOTTER INFORMATION STATEMENT
SPOTTERS WILL LIKELY BE NEEDED THIS AFTERNOON AND EVENING.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST AT 50 TO 55 MPH.
LMZ740>745-181700-
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-
1147 AM CDT WED JUN 17 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
THIS AFTERNOON AND TONIGHT.
WEATHER HAZARDS EXPECTED...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
SIGNIFICANT THUNDERSTORM RISK...WITH AN ASSOCIATED:
THUNDERSTORM WATERSPOUT RISK
LEVEL 3 OF 5 THUNDERSTORM WIND GUST RISK...UP TO 65 KNOTS.
LEVEL 2 OF 5 HAIL RISK...UP TO QUARTER SIZE.
DAYS TWO THROUGH SEVEN
THURSDAY THROUGH TUESDAY.
THURSDAY MORNING...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
SATURDAY...
LIMITED THUNDERSTORM RISK.
SUNDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
LIMITED THUNDERSTORM RISK.
MONDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
DOOM
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