779
FZUS53 KLOT 171405
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
905 AM CDT Thu Apr 17 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>742-172115-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
905 AM CDT Thu Apr 17 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING...

.REST OF TODAY...Southeast winds 20 to 25 kt becoming south to 30
kt with a few gale force gusts to 35 kt in the afternoon. Chance
of showers and slight chance of thunderstorms in the afternoon.
Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.TONIGHT...South winds to 30 kt diminishing to 20 to 25 kt. A few
gale force gusts to 35 kt in the evening. Chance of showers and
slight chance of thunderstorms in the evening, then slight chance
of showers and thunderstorms after midnight. Waves 4 to 6 ft
occasionally to 8 ft.
.FRIDAY...South winds to 30 kt with a few gale force gusts to 35
kt becoming southwest. Slight chance of showers and thunderstorms.
Waves 3 to 5 ft subsiding to 2 to 4 ft.
.FRIDAY NIGHT...Southwest winds to 30 kt becoming northwest and
diminishing to around 15 kt overnight. Showers likely and a
chance of thunderstorms in the evening, then chance of showers
and slight chance of thunderstorms overnight. Waves 2 to 4 ft
subsiding to 1 to 2 ft.

$$

LMZ743>745-172115-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
905 AM CDT Thu Apr 17 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING...

.REST OF TODAY...South winds 20 to 25 kt increasing to 30 kt with
a few gale force gusts to 35 kt in the afternoon. Chance of
showers and slight chance of thunderstorms in the afternoon. Waves
2 to 4 ft.
.TONIGHT...South winds to 30 kt. A few gale force gusts to 35 kt
in the evening. Chance of showers and slight chance of
thunderstorms early in the evening. Waves 2 to 4 ft.
.FRIDAY...South winds to 30 kt with a few gale force gusts to 35
kt becoming southwest. Slight chance of showers and thunderstorms.
Waves 2 to 4 ft.
.FRIDAY NIGHT...Southwest winds to 30 kt becoming northwest and
diminishing to around 15 kt overnight. Showers and a chance of
thunderstorms in the evening, then showers likely and slight
chance of thunderstorms overnight. Waves 2 to 4 ft subsiding to
1 to 3 ft.

$$
KJB