744
FLUS43 KLOT 161918
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
218 PM CDT WED SEP 16 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-171930-
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-
218 PM CDT WED SEP 16 2026 /318 PM EDT WED SEP 16 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.
ELEVATED FLOODING RISK.
DISCUSSION...
SHOWERS AND STORMS ARE EXPECTED TO MOVE ACROSS THE AREA OVERNIGHT
INTO THURSDAY MORNING. TORRENTIAL DOWNPOURS MAY LEAD TO LOCALIZED
FLOODING ESPECIALLY NEAR AND SOUTH OF INTERSTATE 80.
DAYS TWO THROUGH SEVEN
THURSDAY THROUGH TUESDAY.
THURSDAY...
LIMITED FLOODING RISK IN THE MORNING.
ELEVATED THUNDERSTORM RISK IN THE MORNING.
SATURDAY AND SUNDAY...
ELEVATED FLOODING RISK.
ELEVATED THUNDERSTORM RISK.
HIGH SWIM RISK LAKE MICHIGAN BEACHES.
MONDAY...
LIMITED THUNDERSTORM RISK.
DISCUSSION...
ADDITIONAL EPISODES OF SHOWERS AND STORMS ARE EXPECTED IN THE
GENERAL AREA THIS WEEKEND. REPEATED DOWNPOURS MAY LEAD TO
LOCALIZED FLOODING.
SPOTTER INFORMATION STATEMENT
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST AT 35 TO 40 MPH.
LMZ740>745-171930-
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-
218 PM CDT WED SEP 16 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.
DAYS TWO THROUGH SEVEN
THURSDAY THROUGH TUESDAY.
THURSDAY...
ELEVATED THUNDERSTORM RISK IN THE MORNING.
FRIDAY
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE POSSIBLE.
SATURDAY THROUGH TUESDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE POSSIBLE AT TIMES.
ELEVATED THUNDERSTORM RISK AT TIMES.
BORCHARDT
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