581
FZUS53 KLOT 210827
NSHLOT
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
327 AM 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.
LMZ740-211515-
WINTHROP HARBOR TO WILMETTE HARBOR IL-
327 AM CDT FRI AUG 21 2026
TODAY
SOUTHWEST WINDS 5 TO 10 KT BECOMING SOUTH 10 TO 15 KT IN
THE AFTERNOON. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON. WAVES 1 TO 2 FT.
TONIGHT
SOUTHWEST WINDS 10 TO 15 KT BECOMING WEST OVERNIGHT.
CHANCE OF SHOWERS AND THUNDERSTORMS, MAINLY IN THE EVENING. WAVES
1 TO 2 FT.
SATURDAY
NORTHWEST WINDS 15 TO 20 KT BECOMING NORTH. SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. WAVES 1 TO
3 FT.
SATURDAY NIGHT
NORTH WINDS 10 TO 15 KT. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING. WAVES 1 TO 3 FT
BUILDING TO 2 TO 4 FT.
LMZ741>743-211515-
WILMETTE HARBOR TO NORTHERLY ISLAND IL-
NORTHERLY ISLAND TO CALUMET HARBOR IL-
CALUMET HARBOR IL TO GARY IN-
327 AM CDT FRI AUG 21 2026
TODAY
SOUTHWEST WINDS 5 TO 10 KT BECOMING SOUTH 10 TO 15 KT IN
THE AFTERNOON. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON. WAVES 1 TO 2 FT.
TONIGHT
SOUTHWEST WINDS 10 TO 15 KT BECOMING WEST OVERNIGHT.
CHANCE OF SHOWERS AND THUNDERSTORMS, MAINLY IN THE EVENING. WAVES
1 TO 3 FT.
SATURDAY
NORTHWEST WINDS 15 TO 20 KT BECOMING NORTH IN THE
AFTERNOON. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON. WAVES 1 TO 3 FT BUILDING TO 2 TO 4 FT.
SATURDAY NIGHT
NORTH WINDS 10 TO 20 KT. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING. WAVES 2 TO 4 FT BUILDING
TO 3 TO 5 FT.
LMZ744-745-211515-
GARY TO BURNS HARBOR IN-BURNS HARBOR TO MICHIGAN CITY IN-
327 AM CDT FRI AUG 21 2026
TODAY
SOUTH WINDS 10 TO 15 KT. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. WAVES 1 TO 2 FT.
TONIGHT
SOUTHWEST WINDS 10 TO 15 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 1 TO 3 FT.
SATURDAY
NORTHWEST WINDS 15 TO 20 KT BECOMING NORTH. SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. WAVES 2 TO 4
FT BUILDING TO 3 TO 6 FT OCCASIONALLY TO 8 FT. A SMALL CRAFT
ADVISORY WILL LIKELY BE NEEDED.
SATURDAY NIGHT
NORTH WINDS 15 TO 20 KT. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING. WAVES 3 TO 6 FT
OCCASIONALLY TO 8 FT. A SMALL CRAFT ADVISORY WILL LIKELY BE
NEEDED.
YACK
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