370
FZUS53 KLOT 031420
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
920 AM 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.

LMZ740-032115-
Winthrop Harbor to Wilmette Harbor IL-
920 AM CDT Wed Sep 3 2025

.REST OF TODAY...Southwest winds 15 to 25 kt shifting northwest
in the late afternoon. Chance of showers and thunderstorms late
in the morning, then showers likely and a chance of thunderstorms
in the afternoon. Waves 1 to 3 ft.
.TONIGHT...Northwest winds 15 to 25 kt. Scattered showers and a
chance of thunderstorms early in the evening. Waves 2 to 4 ft.
.THURSDAY...Northwest winds 10 to 15 kt becoming west in the
afternoon. Mostly sunny. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.THURSDAY NIGHT...Southwest winds around 20 kt increasing to
30 kt. Slight chance of showers in the evening, then chance of
showers overnight. Waves 1 to 3 ft building to 3 to 5 ft.

$$

LMZ741-032115-
Wilmette Harbor to Northerly Island IL-
920 AM CDT Wed Sep 3 2025

.REST OF TODAY...Southwest winds 15 to 25 kt becoming northwest
in the late afternoon. Slight chance of showers and thunderstorms
late in the morning, then showers likely and a chance of
thunderstorms in the afternoon. Waves 1 to 3 ft.
.TONIGHT...Northwest winds 15 to 25 kt. Scattered showers and a
chance of thunderstorms early in the evening. Waves 2 to 4 ft
building to 3 to 5 ft.
.THURSDAY...Northwest winds 10 to 15 kt becoming west in the
afternoon. Mostly sunny. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.THURSDAY NIGHT...Southwest winds 20 to 25 kt. Chance of showers
overnight. Waves 1 to 3 ft building to 2 to 4 ft.

$$

LMZ742-743-032115-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
920 AM CDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM CDT THIS EVENING
THROUGH LATE TONIGHT...

.REST OF TODAY...Southwest winds 15 to 25 kt becoming northwest
toward evening. Slight chance of showers and thunderstorms late
in the morning, then showers and a chance of thunderstorms in
the afternoon. Waves 1 to 3 ft.
.TONIGHT...Northwest winds 20 to 25 kt easing to 10 to 20 kt
late. Scattered showers and a chance of thunderstorms early in
the evening. Waves 3 to 5 ft.
.THURSDAY...Northwest winds 10 to 15 kt becoming west in the
afternoon. Mostly sunny. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.THURSDAY NIGHT...Southwest winds 20 to 25 kt becoming south.
Slight chance of showers overnight. Waves 1 to 3 ft building to
2 to 4 ft.

$$

LMZ744-745-032115-
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
920 AM CDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM CDT THIS EVENING
THROUGH THURSDAY AFTERNOON...

.REST OF TODAY...Southwest winds 15 to 25 kt becoming northwest
toward evening. Slight chance of showers and thunderstorms late
in the morning, then showers and a chance of thunderstorms in
the afternoon. Waves 2 to 4 ft.
.TONIGHT...Northwest winds 20 to 25 kt. Numerous showers and a
chance of thunderstorms early in the evening. Waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft.
.THURSDAY...Northwest winds around 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.
.THURSDAY NIGHT...Southwest winds 20 to 25 kt becoming south.
Slight chance of showers overnight. Waves 1 to 3 ft building to
3 to 5 ft.

$$