727
FZUS53 KLOT 220822
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
322 AM CDT Thu May 22 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.

LMZ740-221530-
Winthrop Harbor to Wilmette Harbor IL-
322 AM CDT Thu May 22 2025

.TODAY...Northwest winds 15 to 20 kt becoming north 15 to 25 kt
in the afternoon. Chance of showers in the morning, then isolated
showers in the afternoon. Waves 2 to 4 ft building to 3 to 5 ft.
.TONIGHT...North winds 10 to 15 kt becoming northwest 5 to 10 kt
overnight. Partly cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.FRIDAY...Northwest winds 5 to 10 kt becoming northeast in the
afternoon. Mostly sunny in the morning, then becoming partly
cloudy. Waves 1 to 3 ft.
.FRIDAY NIGHT...Northeast winds 5 to 10 kt becoming northwest
overnight. Partly cloudy in the evening then clearing. Waves
around 1 ft.

$$

LMZ741-742-221530-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
322 AM CDT Thu May 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 9 AM CDT THIS MORNING
THROUGH THIS EVENING...

.TODAY...Northwest winds 15 to 25 kt becoming north and increasing
to 20 to 25 kt by late morning. Chance of showers in the morning,
then isolated showers in the afternoon. Waves 2 to 4 ft building
to 3 to 6 ft occasionally to 8 ft.
.TONIGHT...North winds 10 to 20 kt becoming northwest and
diminishing to 5 to 10 kt overnight. Partly cloudy. Waves 3 to
6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.FRIDAY...Northwest winds 5 to 10 kt becoming northeast 10 to
15 kt in the afternoon. Mostly sunny in the morning, then
becoming partly cloudy. Waves 1 to 3 ft.
.FRIDAY NIGHT...Northeast winds 5 to 10 kt becoming northwest
overnight. Partly cloudy in the evening, then becoming mostly
clear. Waves 1 to 2 ft.

$$

LMZ743>745-221530-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
322 AM CDT Thu May 22 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.TODAY...Northwest winds 20 to 25 kt becoming north in the
afternoon. Chance of showers in the morning. Waves 3 to 6 ft
occasionally to 8 ft building to 4 to 7 occasionally to 9 ft.
.TONIGHT...North winds 15 to 25 kt becoming northwest and
diminishing to 10 to 15 kt overnight. Partly cloudy. Waves 4 to
6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.FRIDAY...Northwest winds 10 to 15 kt becoming north in the
afternoon. Mostly sunny. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.FRIDAY NIGHT...Northeast winds 5 to 10 kt becoming north
overnight. Mostly clear. Waves 1 to 2 ft.

$$