575
FLUS43 KLOT 170229
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
929 PM CDT SUN AUG 16 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-180230-
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-
929 PM CDT SUN AUG 16 2026 /1029 PM EDT SUN AUG 16 2026/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
DAY ONE
TONIGHT.
WEATHER HAZARDS EXPECTED...
LIMITED THUNDERSTORM RISK, MAINLY SOUTH OF INTERSTATE 80.
DISCUSSION...
SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE SOUTH OF
INTERSTATE 80 AHEAD OF A COLD FRONT THROUGH MIDNIGHT. TORRENTIAL
DOWNPOURS ARE EXPECTED WITH THESE STORMS IN ADDITION TO LOCALLY
GUSTY WINDS UP TO 40-50 MPH.
DAYS TWO THROUGH SEVEN
MONDAY THROUGH SATURDAY.
TUESDAY...
ELEVATED FLOODING RISK.
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
WEDNESDAY...
LIMITED FLOODING RISK.
LIMITED THUNDERSTORM RISK.
DISCUSSION...
THUNDERSTORM CHANCES RETURN LATE TUESDAY INTO WEDNESDAY, SOME
COULD BE STRONG TO SEVERE AND PRODUCE TORRENTIAL RAINFALL WHICH
MAY LEAD TO FLOODING.
SPOTTER INFORMATION STATEMENT
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST-SOUTHEAST AT 20 TO 25 MPH.
LMZ740>745-180230-
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-
929 PM CDT SUN AUG 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...
LIMITED THUNDERSTORM RISK.
DAYS TWO THROUGH SEVEN
MONDAY THROUGH SATURDAY.
TUESDAY NIGHT AND WEDNESDAY...
LIMITED THUNDERSTORM RISK.
YACK
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