Nearshore Marine Forecast
Issued by NWS Chicago, IL

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721
FZUS53 KLOT 160839
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
339 AM CDT Mon Jun 16 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>742-161515-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
339 AM CDT Mon Jun 16 2025

.TODAY...Northeast winds 5 kt increasing to around 10 kt by
midday. Partly cloudy. Waves around 1 ft.
.TONIGHT...Southeast winds 5 to 10 kt becoming south overnight.
Slight chance of showers and thunderstorms toward morning north of
Chicago. Waves around 1 ft.
.TUESDAY...Southwest winds 10 to 15 kt. Slight chance of showers
and thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon. Waves around 1 ft.
.TUESDAY NIGHT...Southwest winds 5 to 10 kt becoming south
overnight. Chance of showers and thunderstorms in the evening,
then showers and thunderstorms likely overnight. Waves around
1 ft.

$$

LMZ743>745-161515-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
339 AM CDT Mon Jun 16 2025

.TODAY...Southeast winds around 5 kt early, becoming northeast at
5 to 10 kt. Mostly sunny in the morning, then becoming partly
cloudy. Waves around 1 ft.
.TONIGHT...East winds 5 to 10 kt becoming south overnight. Partly
cloudy. Waves around 1 ft.
.TUESDAY...Southwest winds 10 to 15 kt. Slight chance of showers
and thunderstorms in the afternoon. Waves around 1 ft.
.TUESDAY NIGHT...Southwest winds around 10 kt becoming south.
Chance of showers and thunderstorms in the evening, then showers
and thunderstorms likely overnight. Waves around 1 ft.

$$

Ratzer