FZUS53 KLOT 151438
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
Issued by National Weather Service Northern Indiana
938 AM CDT Thu Oct 15 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>742-152130-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
938 AM CDT Thu Oct 15 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON...
...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE
FRIDAY NIGHT...

.TODAY...East winds 10 to 15 kt becoming southeast 10 to 20 kt. 
Scattered showers developing this afternoon. Waves 3 to 5 ft. 
.TONIGHT...South winds 15 to 25 kt becoming west to 30 kt with a
few gale force gusts to 35 kt. Showers in the evening. Waves 3 to
5 ft. 
.FRIDAY...Northwest winds to 30 kt becoming northerly gales to 40
kt in the afternoon. Numerous showers especially in the afternoon.  
Slight chance of waterspouts in the afternoon. Waves 4 to 6 ft 
occasionally to 8 ft quickly building to 7 to 10 ft occasionally 
to 13 ft.
.FRIDAY NIGHT...Northerly gales to 40 kt diminishing to 30 kt 
after midnight. Scattered showers ending by midnight. Waves 12 to
14 ft occasionally to 18 ft. 

$$

LMZ743>745-152130-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
938 AM CDT Thu Oct 15 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON...
...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE
FRIDAY NIGHT...

.TODAY...East winds 15 to 20 kt becoming southeast. Scattered 
showers developing this afternoon. Waves 1 to 3 ft.
.TONIGHT...South winds 15 to 25 kt becoming west to 30 kt with a
few gale force gusts to 35 kt. Showers. Waves 1 to 2 ft building 
to 5 to 8 ft occasionally to 10 ft. 
.FRIDAY...Northwest winds to 30 kt becoming northerly gales to 40
kt in the afternoon. Numerous showers especially in the afternoon.  
Slight chance of waterspouts in the afternoon. Waves 8 to 11 ft 
occasionally to 14 ft building to 12 to 14 ft occasionally to 18 
ft. 
.FRIDAY NIGHT...Northerly gales to 40 kt diminishing to 30 kt
after midnight. Scattered showers ending by midnight. Waves 12 to
16 ft occasionally to 21 ft. 

$$