486
FLUS43 KLOT 220809
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
309 AM CDT SAT AUG 22 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-230815-
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-
309 AM CDT SAT AUG 22 2026 /409 AM EDT SAT AUG 22 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...
LIMITED THUNDERSTORM RISK NEAR LAKE MICHIGAN.
HIGH SWIM RISK PORTER COUNTY LAKE MICHIGAN BEACHES.
DISCUSSION...
ISOLATED TO WIDELY SCATTERED SHOWERS AND THUNDERSTORMS ARE
POSSIBLE NEAR LAKE MICHIGAN THIS AFTERNOON. NO SEVERE WEATHER IS
EXPECTED.
BREEZY NORTH-NORTHWEST WINDS WILL RESULT IN BUILDING WAVES AND
DANGEROUS SWIMMING CONDITIONS AT PORTER COUNTY, INDIANA LAKE
MICHIGAN BEACHES TODAY.
DAYS TWO THROUGH SEVEN
SUNDAY THROUGH FRIDAY.
SUNDAY...
HIGH SWIM RISK LAKE MICHIGAN BEACHES.
TUESDAY NIGHT THROUGH THURSDAY...
LIMITED THUNDERSTORM RISK.
DISCUSSION...
HIGH WAVES WILL CREATE DANGEROUS SWIMMING CONDITIONS AT ALL
INDIANA AND COOK COUNTY, ILLINOIS LAKE MICHIGAN BEACHES LATE
TONIGHT THROUGH SUNDAY EVENING.
SPOTTER INFORMATION STATEMENT
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE SOUTHEAST AT 35 MPH.
LMZ740>745-230815-
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-
309 AM CDT SAT AUG 22 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...
HAZARDOUS CONDITIONS FOR SMALL CRAFT.
LIMITED THUNDERSTORM RISK.
DAYS TWO THROUGH SEVEN
SUNDAY THROUGH FRIDAY.
SUNDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
TUESDAY NIGHT THROUGH THURSDAY...
LIMITED THUNDERSTORM RISK.
YACK
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