418
FZUS53 KLOT 280920 CCA
NSHLOT

Nearshore Marine Forecast...CORRECTED
National Weather Service Chicago/Romeoville IL
420 AM CDT Thu Aug 28 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>742-282115-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
420 AM CDT Thu Aug 28 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM CDT THIS AFTERNOON
THROUGH FRIDAY AFTERNOON...

.EARLY THIS MORNING...West winds 15 to 25 kt. Showers with
isolated thunderstorms. Waves 1 to 3 ft.
.TODAY...West winds 10 to 20 kt shifting to north and increasing
to 20 to 25 kt this afternoon. Scattered showers and isolated
thunderstorms ending this morning, then a chance of showers and
thunderstorms in the afternoon with a slight chance of
waterspouts. Waves 1 to 3 ft quickly building to 4 to 7 ft
occasionally to 9 ft this afternoon.
.TONIGHT...Northeast winds 20 to 25 kt gradually diminishing to 10
to 20 kt overnight. Mostly clear. Waves 5 to 8 ft occasionally to
10 ft.
.FRIDAY...Northeast winds 10 to 15 kt. Partly cloudy. Waves 4 to
7 ft occasionally to 9 ft subsiding to 2 to 4 ft by late
afternoon.
.FRIDAY NIGHT...Northeast winds 5 to 10 kt. Partly cloudy. Waves
1 to 3 ft.

$$

LMZ743>745-282115-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
420 AM CDT Thu Aug 28 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM CDT THIS AFTERNOON
THROUGH FRIDAY MORNING...

.EARLY THIS MORNING...Southwest winds 15 to 25 kt. Showers with
isolated thunderstorms. Waves 2 to 4 ft.
.TODAY...Southwest winds 10 to 20 kt becoming west this morning,
then shifting to north 20 to 25 kt late. Numerous showers with
isolated thunderstorms in the morning, then slight chance of
showers and thunderstorms in the afternoon. Slight chance of
waterspouts in the afternoon. Waves 1 to 3 ft building to 3 to 5
ft.
.TONIGHT...North winds 20 to 25 kt becoming northeast overnight.
Mostly clear. Waves 4 to 7 ft occasionally to 9 ft.
.FRIDAY...Northeast winds 10 to 15 kt. Partly cloudy. Waves 3 to
6 ft occasionally to 8 ft subsiding to 2 to 4 ft by late
afternoon.
.FRIDAY NIGHT...Northeast winds 10 to 15 kt becoming east 5 to
10 kt overnight. Mostly clear. Waves 1 to 2 ft.

$$

- Izzi