819
FZUS53 KLOT 140203
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
903 PM CDT Mon Oct 13 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.

LMZ741-742-140930-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
903 PM CDT Mon Oct 13 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY AFTERNOON THROUGH
WEDNESDAY MORNING...

.REST OF TONIGHT...North winds 5 to 10 kt. Mostly cloudy. Waves 1
to 2 ft.
.TUESDAY...North winds 10 to 15 kt increasing to 15 to 20 kt.
Mostly cloudy in the morning, then becoming partly cloudy. Waves
2 to 4 ft building to 3 to 6 ft occasionally to 8 ft.
.TUESDAY NIGHT...North winds 15 to 20 kt becoming northeast.
Chance of showers overnight. Waves 4 to 6 ft occasionally to 8
ft.
.WEDNESDAY...Northeast winds 10 to 15 kt. Slight chance of
showers in the morning. Waves 4 to 6 ft occasionally to 8 ft
subsiding to 2 to 4 ft.

$$

LMZ740-140930-
Winthrop Harbor to Wilmette Harbor IL-
903 PM CDT Mon Oct 13 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
WEDNESDAY MORNING...

.REST OF TONIGHT...North winds 5 to 10 kt increasing to 10 to 15
kt. Mostly cloudy. Waves 1 to 2 ft.
.TUESDAY...North winds 10 to 15 kt increasing to 15 to 20 kt.
Mostly cloudy in the morning, then becoming partly cloudy. Waves
3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.
.TUESDAY NIGHT...North winds 15 to 20 kt becoming northeast.
Slight chance of showers in the evening, then chance of showers
overnight. Waves 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...Northeast winds 10 to 15 kt. Slight chance of
showers in the morning. Waves 4 to 6 ft occasionally to 8 ft
subsiding to 2 to 4 ft.

$$

LMZ743>745-140930-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
903 PM CDT Mon Oct 13 2025

.REST OF TONIGHT...Northeast winds 5 to 10 kt. Mostly cloudy.
Waves 1 to 2 ft.
.TUESDAY...Northeast winds 10 to 15 kt becoming north 15 to
20 kt. Mostly cloudy in the morning, then becoming partly cloudy.
Waves 1 to 3 ft building to 3 to 5 ft.
.TUESDAY NIGHT...North winds 15 to 20 kt becoming northeast 10 to
15 kt. Chance of showers overnight. Waves 4 to 6 ft occasionally
to 8 ft. A small craft advisory will likely be needed.
.WEDNESDAY...Northeast winds 10 to 15 kt. Slight chance of
showers in the morning. Waves 3 to 5 ft subsiding to 2 to 4 ft. A
small craft advisory will likely be needed.

$$

Ratzer