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FLUS43 KLOT 180229
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
929 PM CDT THU SEP 17 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-190230-
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 THU SEP 17 2026 /1029 PM EDT THU SEP 17 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 SOUTH OF I-80.
DISCUSSION...
A FEW ISOLATED THUNDERSTORMS COULDN'T BE RULED OUT SOUTH OF I-80
OVERNIGHT. MOST OF THE AREA WILL REMAIN DRY TONIGHT.
DAYS TWO THROUGH SEVEN
FRIDAY THROUGH WEDNESDAY.
FRIDAY...
HIGH SWIM RISK ILLINOIS BEACHES.
FRIDAY NIGHT...
ELEVATED FLOODING RISK.
LIMITED THUNDERSTORM RISK.
HIGH SWIM RISK ILLINOIS BEACHES.
SATURDAY...
ELEVATED FLOODING RISK.
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
HIGH SWIM RISK ILLINOIS BEACHES.
SUNDAY AND MONDAY...
LIMITED TO ELEVATED FLOODING RISK.
LIMITED THUNDERSTORM RISK.
HIGH SWIM RISK LAKE MICHIGAN BEACHES.
DISCUSSION...
ADDITIONAL EPISODES OF SHOWERS AND STORMS ARE EXPECTED IN THE
GENERAL AREA THIS WEEKEND. REPEATED ROUNDS OF TORRENTIAL RAINFALL
MAY LEAD TO INSTANCES OF FLASH FLOODING, AS WELL AS RIVER RISES
INTO NEXT WEEK.
SPOTTER INFORMATION STATEMENT
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST-SOUTHEAST AT 25 TO 30 MPH.
LMZ740>745-190230-
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 THU SEP 17 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...
HAZARDOUS CONDITIONS FOR SMALL CRAFT.
DAYS TWO THROUGH SEVEN
FRIDAY THROUGH WEDNESDAY.
FRIDAY THROUGH MONDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY AT TIMES.
LIMITED THUNDERSTORM RISK AT TIMES.
TUESDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
OGOREK
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