Nearshore Marine Forecast
Issued by NWS Chicago, IL

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FZUS53 KLOT 240846
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
346 AM CDT Tue Jun 24 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>742-241600-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
346 AM CDT Tue Jun 24 2025

.TODAY...Variable winds under 5 kt becoming southwest 5 to 10 kt
mid morning then becoming northeast in the afternoon. Scattered
showers and thunderstorms in the afternoon. Waves 1 to 2 ft. Winds
and waves may be higher in and near thunderstorms.
.TONIGHT...North winds 5 to 10 kt. Scattered showers and
thunderstorms. Waves 1 to 2 ft.
.WEDNESDAY...North winds 5 to 10 kt increasing to 10 to 15 kt.
Scattered showers and thunderstorms. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...Northeast winds 5 to 10 kt becoming south
overnight. Chance of showers and thunderstorms. Waves 1 to 2 ft.

$$

LMZ743>745-241600-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
346 AM CDT Tue Jun 24 2025

.TODAY...Variable winds under 5 kt becoming southwest 5 to 10 kt
mid morning then becoming north in the afternoon. Scattered
showers and thunderstorms in the afternoon. Waves 1 ft or less.
Winds and waves may be higher in and near thunderstorms.
.TONIGHT...Northeast winds 5 to 10 kt becoming north. Scattered
showers and thunderstorms. Waves 1 ft or less.
.WEDNESDAY...North winds 5 to 10 kt. Scattered showers and
thunderstorms. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...Northeast winds 5 to 10 kt becoming south
overnight. Chance of showers and thunderstorms. Waves 1 to 2 ft.

$$

Petr