031
FZUS53 KLOT 311940
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
240 PM CDT Thu Jul 31 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>742-010315-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
240 PM CDT Thu Jul 31 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY MORNING...

.TONIGHT...Northeast winds 20 to 25 kt becoming east. Patchy
smoke. Isolated showers in the evening. Waves 4 to 7 ft
occasionally to 9 ft.
.FRIDAY...Northeast winds 10 to 15 kt. Scattered sprinkles in the
morning. Waves 3 to 6 ft occasionally to 8 ft subsiding to 2 to 4
ft by the afternoon.
.FRIDAY NIGHT...Northeast winds 10 to 15 kt. Partly cloudy. Waves
2 to 4 ft subsiding to 1 to 3 ft.
.SATURDAY...Northeast winds 5 to 10 kt. Decreasing cloudiness.
Waves 1 to 2 ft.


$$

LMZ743>745-010315-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
240 PM CDT Thu Jul 31 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY MORNING...


.TONIGHT...North winds 20 to 25 kt becoming east. Patchy smoke in
the evening. Scattered sprinkles. Waves 4 to 6 ft occasionally to
98ft.
.FRIDAY...Northeast winds 10 to 15 kt in the morning. Mostly
sunny. Waves 3 to 5 ft subsiding to 2 to 4 ft in the afternoon.
.FRIDAY NIGHT...Northeast winds 10 to 20 kt becoming east and
diminishing to 5 to 10 kt overnight. Partly Cloudy. Waves 2 to 4
ft.
.SATURDAY...East winds 5 to 10 kt becoming northeast in the
afternoon. Decreasing cloudiness. Waves 1 to 2 ft.

$$

Borchardt