501
FLUS43 KLOT 151929
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
229 PM CDT TUE SEP 15 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-161930-
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-
229 PM CDT TUE SEP 15 2026 /329 PM EDT TUE SEP 15 2026/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
DAY ONE
TONIGHT.
WEATHER HAZARDS EXPECTED...
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 DAMAGING WIND RISK...UP TO 60 MPH.
ELEVATED FLOODING RISK.
DISCUSSION...
SHOWERS AND STORMS ARE EXPECTED TO DEVELOP NEAR AND EAST OF
INTERSTATE 55 THIS AFTERNOON AND THEN EXPEND IN COVERAGE NEAR AND
SOUTH OF INTERSTATE 80 AFTER SUNSET. SOME STORMS MAY PRODUCE
LOCALLY DAMAGING WINDS AND TORRENTIAL DOWNPOURS.
DAYS TWO THROUGH SEVEN
WEDNESDAY THROUGH MONDAY.
WEDNESDAY INTO THURSDAY MORNING...
ELEVATED FLOODING RISK.
LIMITED THUNDERSTORM RISK.
FRIDAY INTO SATURDAY...
ELEVATED FLOODING RISK.
LIMITED THUNDERSTORM RISK.
DISCUSSION...
ADDITIONAL EPISODES OF SHOWERS AND STORMS ARE EXPECTED IN THE
GENERAL AREA THROUGH THE WEEK. REPEATED DOWNPOURS MAY LEAD TO
LOCALIZED FLOODING.
SPOTTER INFORMATION STATEMENT
SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE NORTHEAST AT 30 MPH.
LMZ740>745-161930-
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-
229 PM CDT TUE SEP 15 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
TONIGHT.
WEATHER HAZARDS EXPECTED...
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 THUNDERSTORM WIND GUST RISK...UP TO 40 KNOTS.
DAYS TWO THROUGH SEVEN
WEDNESDAY THROUGH MONDAY.
WEDNESDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE POSSIBLE.
LIMITED THUNDERSTORM RISK.
THURSDAY...
LIMITED THUNDERSTORM RISK.
FRIDAY THROUGH SUNDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE POSSIBLE AT TIMES.
LIMITED THUNDERSTORM RISK.
MONDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
BORCHARDT
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