FZUS53 KLOT 200156
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
856 PM CDT Mon May 19 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>742-200915-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
856 PM CDT Mon May 19 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON...

.REST OF TONIGHT...Northeast winds 15 to 25 kt increasing to 30 kt
with a few gale force gusts by daybreak. Rain by daybreak Tuesday.
Waves 3 to 5 ft building to 6 to 9 ft occasionally to 12 ft. 
.TUESDAY...East winds to 30 kt with a few gale force gusts to 35
kt. Showers. Waves 7 to 10 ft occasionally to 13 ft. 
.TUESDAY NIGHT...East winds to 30 kt diminishing to 10 to 20 kt.
Scattered showers and drizzle. Waves 6 to 9 ft occasionally to 12
ft subsiding to 4 to 7 ft occasionally to 9 ft. 
.WEDNESDAY...Northeast winds 10 to 20 kt becoming northwest in
the afternoon. Scattered showers and drizzle. Waves 4 to 6 ft 
occasionally to 8 ft subsiding to 3 to 5 ft. 

$$

LMZ743>745-200915-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
856 PM CDT Mon May 19 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT...

.REST OF TONIGHT...East winds 15 to 25 kt increasing to 30 kt.
Rain by daybreak Tuesday. Waves 3 to 5 ft building to 4 to 6 ft 
occasionally to 8 ft.
.TUESDAY...East winds to 30 kt with a few gale force gusts to 35
kt. Showers and perhaps a thunderstorm. Waves 4 to 6 ft 
occasionally to 8 ft.
.TUESDAY NIGHT...Southeast winds to 30 kt diminishing to 10 to 15
kt. Scattered showers and drizzle. Waves 3 to 5 ft subsiding to 2
to 4 ft. 
.WEDNESDAY...Southwest winds 10 to 20 kt becoming west in the
afternoon. Scattered showers and areas of drizzle. Waves 1 to 3 
ft building to 2 to 4 ft. 

$$

Borchardt