Nearshore Marine Forecast
Issued by NWS Chicago, IL

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041
FZUS53 KLOT 090954
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
454 AM CDT Fri May 9 2025

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>742-091730-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
454 AM CDT Fri May 9 2025

.TODAY...Northeast winds 5 to 10 kt becoming east late in the
afternoon. Sunny. Waves 2 to 4 ft subsiding to 1 to 2 ft.
.TONIGHT...Southeast winds 5 to 10 kt becoming southwest
overnight. Clear. Waves around 1 ft.
.SATURDAY...West winds 5 to 10 kt early becoming north 10 to 20
kt in the late morning and increasing to 30 kt in the afternoon.
Mostly sunny. Waves around 1 ft building to 3 to 6 ft occasionally
to 8 ft. A small craft advisory will likely be needed.
.SATURDAY NIGHT...North winds to 30 kt becoming northeast and
diminishing to 10 to 15 kt. Clear. Waves 4 to 6 ft occasionally
to 8 ft subsiding to 3 to 5 ft.

$$

LMZ743>745-091730-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
454 AM CDT Fri May 9 2025

.TODAY...Northeast winds 5 to 10 kt. Sunny. Waves 2 to 4 ft
subsiding to 1 to 2 ft.
.TONIGHT...Southeast winds 5 to 10 kt becoming southwest
overnight. Clear. Waves 1 to 2 ft.
.SATURDAY...West winds 10 to 15 kt becoming north 10 to 20 kt in
the early afternoon and increasing to 30 kt in the late
afternoon. Mostly sunny. Waves around 1 ft building to 3 to 5 ft
late. A small craft advisory will likely be needed.
.SATURDAY NIGHT...North winds to 30 kt becoming northeast and
diminishing to 10 to 15 kt. Clear. Waves 4 to 6 ft occasionally
to 8 ft.

$$

Petr