637
FLUS43 KLOT 160836
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
336 AM CDT SUN AUG 16 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-170845-
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-
336 AM CDT SUN AUG 16 2026 /436 AM EDT SUN AUG 16 2026/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
DAY ONE
TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED...
ELEVATED FLOODING RISK EARLY THIS MORNING.
LIMITED THUNDERSTORM RISK.
DISCUSSION...
ISOLATED THUNDERSTORMS REMAIN POSSIBLE THROUGH EARLY THIS
MORNING, MAINLY NEAR THE WISCONSIN-ILLINOIS STATE LINE AND SOUTH
OF A PONTIAC TO RENSSELAER LINE. LOCALIZED HEAVY RAINFALL MAY
LEAD TO FLOODING, ESPECIALLY IF IT OCCURS IN AREAS THAT RECEIVED
HEAVY RAIN THE PAST FEW DAYS.
ISOLATED TO WIDELY SCATTERED THUNDERSTORMS MAY DEVELOP ALONG A
COLD FRONT THIS AFTERNOON AND EVENING. A FEW STORMS MAY BE
CAPABLE OF GUSTY WINDS, MAINLY SOUTH OF A PONTIAC TO VALPARAISO
LINE.
DAYS TWO THROUGH SEVEN
MONDAY THROUGH SATURDAY.
TUESDAY NIGHT...
ELEVATED FLOODING RISK.
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
WEDNESDAY...
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 AROUND 30 MPH THIS MORNING THEN SOUTHEAST
THIS AFTERNOON AND EVENING.
LMZ740>745-170845-
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-
336 AM 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
TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED...
LIMITED THUNDERSTORM RISK.
DAYS TWO THROUGH SEVEN
MONDAY THROUGH SATURDAY.
TUESDAY NIGHT AND WEDNESDAY...
LIMITED THUNDERSTORM RISK.
PETR
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