459
FZUS53 KLOT 022040
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
340 PM CDT Tue Sep 2 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.

LMZ740-030400-
Winthrop Harbor to Wilmette Harbor IL-
340 PM CDT Tue Sep 2 2025

.TONIGHT...East winds 5 to 10 kt becoming southwest and then
increasing to 10 to 15 kt late. Clear in the evening, then
becoming partly cloudy. Waves around 1 ft.
.WEDNESDAY...Southwest winds 15 to 20 kt becoming west in the
afternoon. Chance of showers and slight chance of thunderstorms in
the morning, then periods of showers and a chance of
thunderstorms in the afternoon. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 kt. Chance of showers
and slight chance of thunderstorms in the evening. Waves 1 to 3 ft
building to 2 to 4 ft.
.THURSDAY...Northwest winds 10 to 20 kt becoming west 10 to 15 kt
in the afternoon. Mostly sunny in the morning, then becoming
partly cloudy. Waves 1 to 3 ft.

$$

LMZ741>743-030400-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
340 PM CDT Tue Sep 2 2025

.TONIGHT...East winds 5 to 10 kt becoming southwest and then
increasing to 10 to 15 kt late. Mostly clear. Waves around 1 ft.
.WEDNESDAY...Southwest winds 15 to 20 kt becoming west in the
afternoon. Slight chance of showers in the morning, then periods
of showers and a chance of thunderstorms in the afternoon. Waves 1
to 2 ft.
.WEDNESDAY NIGHT...Northwest winds 20 to 25 kt. Periods of
showers and slight chance of thunderstorms in the evening. Waves 1
to 3 ft quickly building to 3 to 5 ft. A small craft advisory may
be needed.
.THURSDAY...Northwest winds 15 to 20 kt becoming west 10 to 15 kt
in the afternoon. Mostly sunny. Waves 3 to 5 ft subsiding to 1 to
3 ft.

$$

LMZ744-745-030400-
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
340 PM CDT Tue Sep 2 2025

.TONIGHT...Northeast winds 5 to 10 kt becoming southwest after
midnight. Mostly clear. Waves around 1 ft.
.WEDNESDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt
and becoming west in the afternoon. Periods of showers and a
chance of thunderstorms in the afternoon. Waves 1 to 3 ft.
.WEDNESDAY NIGHT...Northwest winds 20 to 25 kt. Periods of
showers and a chance of thunderstorms in the evening. Waves 2 to 4
ft quickly building to 4 to 6 ft occasionally to 8 ft. A small
craft advisory will likely be needed.
.THURSDAY...Northwest winds 15 to 20 kt becoming west 10 to 15 kt
in the afternoon. Mostly sunny. Waves 4 to 6 ft occasionally to 8
ft subsiding to 2 to 4 ft. A small craft advisory will likely be
needed.

$$

RC