366
FZUS53 KLOT 240239
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
939 PM CDT Wed Jul 23 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>742-240930-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
939 PM CDT Wed Jul 23 2025

.REST OF TONIGHT...South winds 15 to 20 kt. Mostly clear. Waves 1
to 3 ft.
.THURSDAY...Southwest winds 15 to 20 kt becoming west late.
Slight chance of showers and thunderstorms late in the morning,
then chance of showers and thunderstorms in the afternoon. Waves 1
to 2 ft.
.THURSDAY NIGHT...West winds 10 to 15 kt becoming northwest 5 to
10 kt overnight. Chance of showers and thunderstorms. Waves 1 ft
or less.
.FRIDAY...North winds 5 to 10 kt becoming northeast. Chance of
showers and slight chance of thunderstorms in the morning, then
chance of showers and thunderstorms in the afternoon. Waves 1 to
2 ft.

$$

LMZ743>745-240930-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
939 PM CDT Wed Jul 23 2025

.REST OF TONIGHT...South winds 15 to 20 kt. Partly cloudy late in
the evening then clearing. Waves 1 to 2 ft.
.THURSDAY...Southwest winds 15 to 20 kt becoming west late.
Chance of showers and thunderstorms in the afternoon. Waves 1 to
2 ft.
.THURSDAY NIGHT...West winds 10 to 15 kt becoming northwest 5 to
10 kt overnight. Showers likely and a chance of thunderstorms.
Waves 1 to 2 ft.
.FRIDAY...Northwest winds 5 to 10 kt becoming north in the
afternoon. Showers likely and slight chance of thunderstorms in
the morning, then chance of showers and thunderstorms in the
afternoon. Waves around 1 ft.

$$

Petr