FZUS53 KLOT 192001
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
301 PM CDT Tue May 19 2026

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>742-200330-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
301 PM CDT Tue May 19 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH
LATE WEDNESDAY NIGHT...

.LATE THIS AFTERNOON...West winds 15 to 25 kt. Mostly cloudy. 
Waves 1 to 3 ft. 
.TONIGHT...Northwest winds 15 to 20 kt becoming north 15 to 25 kt
late. Mostly cloudy. Waves 1 to 3 ft building to 2 to 4 ft. 
.WEDNESDAY...North winds 15 to 25 kt. Mostly cloudy in the 
morning, then becoming partly cloudy. Waves 2 to 4 ft building to 
4 to 6 ft occasionally to 8 ft. 
.WEDNESDAY NIGHT...North winds 15 to 25 kt becoming northeast
15 to 20 kt. Partly cloudy. Waves 4 to 6 ft occasionally to 8 ft
subsiding to 3 to 6 ft.
.THURSDAY...East winds 15 to 20 kt becoming northeast in the
afternoon. Partly cloudy in the morning, then becoming mostly
cloudy. Waves 2 to 4 ft.  

$$

LMZ743>745-200330-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
301 PM CDT Tue May 19 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH
LATE WEDNESDAY NIGHT...

.LATE THIS AFTERNOON...West winds 15 to 25 kt. Slight chance of 
showers. Waves 2 to 4 ft. 
.TONIGHT...Northwest winds 15 to 20 kt becoming north 15 to 25 kt
late. Mostly cloudy. Waves 1 to 3 ft building to 3 to 5 ft. 
.WEDNESDAY...North winds 15 to 25 kt. Mostly cloudy. Waves 4 to 7
ft occasionally to 9 ft. 
.WEDNESDAY NIGHT...North winds 15 to 25 kt becoming northeast and
diminishing to around 15 kt overnight. Partly cloudy. Waves 4 to
6 ft occasionally to 8 ft subsiding to 3 to 5 ft late. 
.THURSDAY...East winds 15 to 20 kt becoming northeast in the
afternoon. Partly cloudy. Waves 2 to 4 ft.  

$$

Kluber