971
FZUS53 KLOT 120847
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
347 AM CDT Fri Sep 12 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>742-121530-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
347 AM CDT Fri Sep 12 2025

.TODAY...Northeast winds 5 to 10 kt becoming east 10 to 15 kt in
the afternoon. Patchy fog in the morning. Waves 1 to 3 ft
building to 2 to 4 ft in the afternoon.
.TONIGHT...Southeast winds 10 to 15 kt becoming south overnight.
Slight chance of showers and thunderstorms overnight. Waves 2 to
4 ft.
.SATURDAY...South winds 10 to 15 kt becoming southeast in the
afternoon. Chance of showers and thunderstorms. Waves 2 to 4 ft.
.SATURDAY NIGHT...Southeast winds 10 to 15 kt becoming south 5 to
10 kt. Slight chance of showers and thunderstorms. Waves 2 to 4 ft
subsiding to 1 to 3 ft.

$$

LMZ743>745-121530-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
347 AM CDT Fri Sep 12 2025

.TODAY...East winds 5 to 10 kt becoming northeast 10 to 15 kt
in the afternoon. Patchy fog in the morning. Waves 1 to 3 ft.
.TONIGHT...East winds 10 to 15 kt becoming south overnight.
Mostly clear in the evening, then becoming partly cloudy. Waves
1 to 3 ft.
.SATURDAY...South winds 10 to 15 kt. Chance of showers and
thunderstorms. Waves 1 to 2 ft.
.SATURDAY NIGHT...Southeast winds around 10 kt becoming south
overnight. Slight chance of showers and thunderstorms. Waves 1 to
2 ft.

$$

Yack