668
FZUS53 KLOT 020821
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
321 AM CDT Tue Sep 2 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>742-022115-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
321 AM CDT Tue Sep 2 2025

.TODAY...Northeast winds 5 to 10 kt becoming east in the
afternoon. Mostly sunny. Waves 1 to 2 ft.
.TONIGHT...East winds 5 to 10 kt becoming southwest 10 to 15 kt
late. Mostly clear. Waves around 1 ft.
.WEDNESDAY...Southwest winds 10 to 15 kt becoming west around
20 kt in the afternoon. Slight chance of showers and
thunderstorms in the morning, then showers and a chance of
thunderstorms in the afternoon. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...Northwest winds around 20 kt. Chance of
showers and slight chance of thunderstorms in the evening. Waves
2 to 4 ft.

$$

LMZ743>745-022115-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
321 AM CDT Tue Sep 2 2025

.TODAY...East winds 5 to 10 kt becoming northeast in the
afternoon. Sunny. Waves 1 to 2 ft.
.TONIGHT...Northeast winds 5 to 10 kt becoming southwest late.
Mostly clear. Waves around 1 ft.
.WEDNESDAY...Southwest winds 10 to 15 kt increasing to around
20 kt in the afternoon. Showers likely and a chance of
thunderstorms in the afternoon. Waves 1 to 3 ft.
.WEDNESDAY NIGHT...West winds 20 to 25 kt becoming northwest
overnight. Showers likely and slight chance of thunderstorms in
the evening, then slight chance of showers overnight. Waves 3 to
5 ft building to 4 to 6 ft occasionally to 8 ft. A small craft
advisory will likely be needed.

$$

KJB