Nearshore Marine Forecast
Issued by NWS Chicago, IL

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FZUS53 KLOT 252055
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
255 PM CST Tue Nov 25 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>742-260445-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
255 PM CST Tue Nov 25 2025

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY
EVENING...

.TONIGHT...Southwest winds 10 to 15 kt increasing to 35 kt gales.
Rain showers. Waves around 1 ft building to 3 to 5 ft.
.WEDNESDAY...West gales to 45 kt with a few storm force gusts to
50 kt. Chance of rain and snow. Waves 4 to 7 ft occasionally to 9
ft.
.WEDNESDAY NIGHT...West gales to 45 kt diminishing to 35 kt.
Chance of snow in the evening. Waves 4 to 7 ft occasionally to 9
ft.
.THURSDAY...Northwest winds to 30 kt. Mostly cloudy. Waves 4 to
6 ft occasionally to 8 ft.

$$

LMZ743>745-260445-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
255 PM CST Tue Nov 25 2025

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY
EVENING...

.TONIGHT...Southwest winds 10 to 15 kt increasing to 35 kt gales.
Rain showers. Waves 1 to 2 ft building to 5 to 8 ft occasionally
to 10 ft.
.WEDNESDAY...West gales to 45 kt with a few storm force gusts to
50 kt. Chance of rain and snow. Waves 7 to 10 ft occasionally to
13 ft building to 10 to 14 ft occasionally to 18 ft.
.WEDNESDAY NIGHT...West gales to 45 kt diminishing to 35 kt.
Chance of snow in the evening. Waves 8 to 12 ft occasionally to 16
ft subsiding to 8 to 11 ft occasionally to 14 ft.
.THURSDAY...West winds to 30 kt becoming northwest. Mostly
cloudy. Waves 8 to 11 ft occasionally to 14 ft.

$$

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