554
FZUS53 KLOT 170254
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
954 PM CDT Thu Oct 16 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>742-170945-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
954 PM CDT Thu Oct 16 2025

.REST OF TONIGHT...Southeast winds 15 to 20 kt becoming south.
Partly cloudy. Waves 1 to 3 ft building to 2 to 4 ft.
.FRIDAY...South winds 15 to 25 kt. Mostly cloudy. Waves 2 to 4
ft.
.FRIDAY NIGHT...South winds 15 to 25 kt. Slight chance of showers
in the evening, then showers likely and slight chance of
thunderstorms overnight. Waves 2 to 4 ft.
.SATURDAY...Southwest winds 15 to 20 kt. Showers and a chance of
thunderstorms. Waves 1 to 3 ft.

$$

LMZ743>745-170945-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
954 PM CDT Thu Oct 16 2025

.REST OF TONIGHT...Southeast winds 15 to 20 kt becoming south.
Mostly clear late in the evening, then becoming partly cloudy.
Waves 1 to 2 ft.
.FRIDAY...South winds 15 to 20 kt. Partly cloudy in the morning,
then becoming mostly cloudy. Waves 1 to 2 ft.
.FRIDAY NIGHT...South winds 15 to 25 kt. Chance of showers
overnight. Waves 1 to 3 ft.
.SATURDAY...Southwest winds 15 to 20 kt. Showers and a chance of
thunderstorms. Waves 1 to 3 ft.

$$

Petr