730
FZUS53 KLOT 220247
NSHLOT
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
947 PM CDT FRI AUG 21 2026
FOR WATERS WITHIN FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN
WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS, WHICH
IS THE AVERAGE OF THE HIGHEST 1/3 OF THE WAVES, ALONG WITH THE
AVERAGE HEIGHT OF THE HIGHEST 10 PERCENT OF THE WAVES WHICH WILL
OCCASIONALLY BE ENCOUNTERED.
LMZ740>742-220930-
WINTHROP HARBOR TO WILMETTE HARBOR IL-
WILMETTE HARBOR TO NORTHERLY ISLAND IL-
NORTHERLY ISLAND TO CALUMET HARBOR IL-
947 PM CDT FRI AUG 21 2026
REST OF TONIGHT
SOUTHWEST WINDS AROUND 10 KT. CHANCE OF
SHOWERS BEFORE MIDNIGHT. WAVES 1 TO 2 FT.
SATURDAY
NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH. SCATTERED
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
WAVES 2 TO 4 FT.
SATURDAY NIGHT
NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH.
MOSTLY CLEAR. WAVES 2 TO 4 FT.
SUNDAY
NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH. MOSTLY
SUNNY. WAVES 2 TO 4 FT.
LMZ743-744-220930-
CALUMET HARBOR IL TO GARY IN-GARY TO BURNS HARBOR IN-
947 PM CDT FRI AUG 21 2026
REST OF TONIGHT
SOUTHWEST WINDS AROUND 10 KT. CHANCE OF
SHOWERS BEFORE MIDNIGHT. WAVES 1 TO 2 FT.
SATURDAY
NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH IN THE
AFTERNOON. SLIGHT CHANCE OF THUNDERSTORMS WITH ISOLATED SHOWERS
IN THE AFTERNOON. WAVES 2 TO 4 FT.
SATURDAY NIGHT
NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH.
MOSTLY CLEAR IN THE EVENING, THEN BECOMING PARTLY CLOUDY. WAVES
2 TO 4 FT.
SUNDAY
NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 3 TO 5 FT.
LMZ745-220930-
BURNS HARBOR TO MICHIGAN CITY IN-
947 PM CDT FRI AUG 21 2026
REST OF TONIGHT
SOUTHWEST WINDS 10 KT. CHANCE OF SHOWERS.
WAVES 1 TO 2 FT.
SATURDAY
NORTHWEST WINDS 15 TO 20 KT. SLIGHT CHANCE OF
THUNDERSTORMS WITH ISOLATED SHOWERS IN THE AFTERNOON. WAVES 3 TO
5 FT. A SMALL CRAFT ADVISORY WILL LIKELY BE NEEDED.
SATURDAY NIGHT
NORTHWEST WINDS 15 TO 20 KT BECOMING NORTH.
SLIGHT CHANCE OF SHOWERS OVERNIGHT. WAVES 3 TO 5 FT.
SUNDAY
NORTHWEST WINDS 15 TO 20 KT BECOMING NORTH. MOSTLY
SUNNY. WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT. A SMALL CRAFT
ADVISORY WILL LIKELY BE NEEDED.
BORCHARDT
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