316
FLUS43 KLOT 150801
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
301 AM CDT SAT AUG 15 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-160815-
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-
301 AM CDT SAT AUG 15 2026 /401 AM EDT SAT AUG 15 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...
SIGNIFICANT FLOODING RISK SOUTH OF INTERSTATE 80 THIS MORNING.
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 DAMAGING WIND RISK...UP TO 60 MPH.
DISCUSSION...
SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS NORTHERN ILLINOIS
AND NORTHWEST INDIANA THROUGH THE MORNING. TORRENTIAL RAINFALL IS
OCCURRING WITH THESE STORMS, ESPECIALLY SOUTH OF INTERSTATE 80,
WHICH COULD LEAD TO FLASH FLOODING. LOCALLY GUSTY WINDS CANNOT BE
RULED OUT EITHER WITH STORMS THIS MORNING.
ANOTHER PERIOD OF SHOWERS AND THUNDERSTORMS IS EXPECTED WITH A
COLD FRONT TONIGHT INTO SUNDAY. THESE STORMS MAY ALSO PRODUCE
HEAVY DOWNPOURS AND LOCALLY GUSTY WINDS.
DAYS TWO THROUGH SEVEN
SUNDAY THROUGH FRIDAY.
SUNDAY...
LIMITED FLOODING RISK.
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
TUESDAY NIGHT AND WEDNESDAY...
ELEVATED FLOODING RISK.
LIMITED THUNDERSTORM RISK.
DISCUSSION...
A STRONG TO LOCALLY SEVERE STORM CANNOT BE RULED OUT SUNDAY,
MAINLY IN THE MORNING. ADDITIONAL STORM CHANCES ARE EXPECTED
TUESDAY NIGHT INTO WEDNESDAY.
SPOTTER INFORMATION STATEMENT
SPOTTERS MAY BE NEEDED FOR FLASH FLOODING REPORTS THIS MORNING.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST AT 30 MPH.
LMZ740>745-160815-
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-
301 AM CDT SAT AUG 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
TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED...
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 THUNDERSTORM WIND GUST RISK...UP TO 40 KNOTS.
DAYS TWO THROUGH SEVEN
SUNDAY THROUGH FRIDAY.
SUNDAY...
LIMITED THUNDERSTORM RISK.
TUESDAY...
LIMITED THUNDERSTORM RISK.
WEDNESDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
LIMITED THUNDERSTORM RISK.
THURSDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
YACK
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