501
FZUS53 KLOT 120900
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
400 AM CDT Mon May 12 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>742-121530-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
400 AM CDT Mon May 12 2025

.TODAY...East winds 5 to 10 kt becoming northeast 10 to 15 kt
late. Partly cloudy in the morning, then becoming mostly cloudy.
Waves 1 to 2 ft.
.TONIGHT...Northeast winds 5 to 10 kt becoming east overnight.
Scattered showers with isolated thunderstorms. Patchy fog
overnight. Waves 1 to 2 ft.
.TUESDAY...East winds 5 to 10 kt. Patchy fog. Scattered showers
with isolated thunderstorms. Waves 1 to 2 ft.
.TUESDAY NIGHT...Northeast winds 5 to 10 kt. Isolated showers and
thunderstorms in the evening. Waves around 1 ft.

$$

LMZ743>745-121530-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
400 AM CDT Mon May 12 2025

.TODAY...Southeast winds 5 to 10 kt becoming north 10 to 15 kt mid
to late morning. Partly cloudy in the morning, then becoming
mostly cloudy. Waves 1 to 2 ft.
.TONIGHT...East winds 5 to 10 kt becoming southeast. Scattered
showers with isolated thunderstorms. Patchy fog overnight. Waves
1 to 2 ft.
.TUESDAY...Southeast winds 5 to 10 kt becoming northeast in the
afternoon. Patchy fog. Isolated showers in the morning, then
scattered showers with isolated thunderstorms in the afternoon.
Waves around 1 ft.
.TUESDAY NIGHT...East winds 5 to 10 kt becoming southeast
overnight. Isolated showers and thunderstorms in the evening.
Waves around 1 ft.

$$

Petr