518
FZUS53 KLOT 032002
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
302 PM CDT Wed Sep 3 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.

LMZ740-040345-
Winthrop Harbor to Wilmette Harbor IL-
302 PM CDT Wed Sep 3 2025

...GALE WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
MORNING...

.TONIGHT...West winds 15 to 25 kt becoming northwest early this
evening. Chance of showers and thunderstorms early this evening.
Waves 1 to 3 ft building to 3 to 5 ft.
.THURSDAY...Northwest winds 15 to 20 kt becoming west 10 to 20
kt in the afternoon. Mostly sunny in the morning, then becoming
partly cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.THURSDAY NIGHT...Southwest winds 10 to 20 kt increasing to gales
to 35 kt after midnight. Slight chance of showers overnight.
Waves 1 to 3 ft building to 4 to 6 ft occasionally to 8 ft.
.FRIDAY...West gales to 35 kt diminishing to 20 to 25 kt. Partly
cloudy in the morning, then becoming mostly cloudy. Waves 3 to 6
ft occasionally to 8 ft subsiding to 2 to 4 ft.

$$

LMZ741-040345-
Wilmette Harbor to Northerly Island IL-
302 PM CDT Wed Sep 3 2025

...GALE WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
MORNING...

.TONIGHT...West winds 15 to 25 kt becoming northwest early this
evening. Showers likely and a chance of thunderstorms early this
this evening. Waves 1 to 3 ft building to 3 to 5 ft.
.THURSDAY...Northwest winds 15 to 20 kt becoming west 10 to 20
kt in the afternoon. Mostly sunny in the morning, then becoming
partly cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.THURSDAY NIGHT...Southwest winds 10 to 20 kt increasing to gales
to 35 kt after midnight. Mostly clear in the evening, then
becoming mostly cloudy. Waves 1 to 3 ft building to 3 to 5 ft.
.FRIDAY...West gales to 35 kt diminishing to 20 to 25 kt in the
afternoon. Partly cloudy. Waves 3 to 5 ft subsiding to 2 to 4 ft.

$$

LMZ742-743-040345-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
302 PM CDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM CDT THIS EVENING
THROUGH LATE TONIGHT...
...GALE WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
MORNING...

.TONIGHT...West winds 15 to 25 kt becoming northwest 20 to 25 kt
early this evening. Showers likely and a chance of thunderstorms
this evening. Waves 2 to 4 ft building to 3 to 6 ft occasionally
to 8 ft.
.THURSDAY...Northwest winds 15 to 25 kt becoming west 10 to 20 kt
in the afternoon. Partly cloudy. Waves 3 to 5 ft subsiding to 1
to 3 ft.
.THURSDAY NIGHT...Southwest winds 10 to 20 kt increasing to gales
to 35 kt after midnight. Mostly clear in the evening, then
becoming mostly cloudy. Waves 1 to 3 ft building to 3 to 5 ft.
.FRIDAY...West gales to 35 kt diminishing to 20 to 25 kt in the
afternoon. Partly cloudy. Waves 3 to 5 ft subsiding to 2 to 4 ft.

$$

LMZ744-745-040345-
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
302 PM CDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM CDT THIS EVENING
THROUGH THURSDAY AFTERNOON...
...GALE WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
MORNING...

.TONIGHT...West winds 15 to 25 kt becoming northwest 20 to 25 kt
early this evening. Showers likely and a chance of thunderstorms
this evening. Waves 3 to 5 ft building to 4 to 7 ft occasionally
to 9 ft.
.THURSDAY...Northwest winds 15 to 25 kt becoming west 10 to 15 kt
in the afternoon. Partly cloudy. Waves 4 to 6 ft occasionally to
8 ft subsiding to 3 to 5 ft.
.THURSDAY NIGHT...Southwest winds 10 to 20 kt increasing to gales
to 35 kt after midnight. Mostly clear in the evening, then
becoming mostly cloudy. Waves 1 to 3 ft building to 3 to 5 ft.
.FRIDAY...West gales to 35 kt diminishing to 20 to 25 kt in the
afternoon. Partly cloudy. Waves 3 to 6 ft occasionally to 8 ft.

$$