614
FZUS53 KLOT 200503 AAA
NSHLOT

Nearshore Marine Forecast...UPDATED
National Weather Service Chicago/Romeoville IL
1203 AM CDT Sun Sep 20 2026

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>742-200915-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
1203 AM CDT Sun Sep 20 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT SUNDAY...
...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM CDT SUNDAY THROUGH
TUESDAY EVENING...

.REST OF TONIGHT...Southeast winds 10 to 20 kt becoming north and
increasing to 15 to 25 kt late. Showers with thunderstorms likely.
Areas of dense fog. Waves 1 to 3 ft building to 2 to 4 ft.
.SUNDAY...North winds 15 to 20 kt becoming northeast and
increasing to 30 kt. Showers and slight chance of thunderstorms
in the morning, then chance of showers in the afternoon. Areas of
dense fog early. Waves 4 to 6 ft occasionally to 8 ft building
to 6 to 9 ft occasionally to 12 ft.
.SUNDAY NIGHT...Northeast winds to 30 kt becoming east 20 to
25 kt. Slight chance of showers in the evening. Waves 6 to 9 ft
occasionally to 12 ft.
.MONDAY...East winds 20 to 25 kt becoming northeast to 30 kt.
Chance of showers in the morning, then slight chance of showers
in the afternoon. Waves 7 to 10 ft occasionally to 13 ft.

$$

LMZ743-744-200915-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
1203 AM CDT Sun Sep 20 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT SUNDAY...
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT SUNDAY THROUGH
TUESDAY EVENING...

.REST OF TONIGHT...Southeast winds around 10 kt becoming north
and increasing to 15 to 20 kt late. Showers with thunderstorms
likely. Areas of dense fog. Waves 1 to 2 ft.
.SUNDAY...North winds 10 to 20 kt becoming northeast and
increasing to 30 kt. Showers and slight chance of thunderstorms
in the morning, then showers likely in the afternoon. Areas of
dense fog early. Waves 2 to 4 ft building to 4 to 7 ft
occasionally to 9 ft.
.SUNDAY NIGHT...Northeast winds to 30 kt becoming east 15 to
25 kt. Chance of showers in the evening, then slight chance of
showers overnight. Waves 4 to 7 ft occasionally to 9 ft.
.MONDAY...East winds 15 to 20 kt becoming northeast 20 to 25 kt.
Chance of showers. Waves 4 to 7 ft occasionally to 9 ft.

$$

LMZ745-200915-
Burns Harbor to Michigan City IN-
1203 AM CDT Sun Sep 20 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT SUNDAY...
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY AFTERNOON THROUGH
MONDAY MORNING...

.REST OF TONIGHT...Southeast winds around 10 kt becoming north
and increasing to 15 to 20 kt late. Showers with thunderstorms
likely. Areas of dense fog. Waves 1 to 2 feet.
.SUNDAY...North winds 10 to 15 kt becoming northeast and
increasing to 20 to 25 kt during the afternoon. Showers and
slight chance of thunderstorms in the morning, then showers likely
in the afternoon. Areas of dense fog early. Waves 1 to 3 ft
building to 4 to 6 ft occasionally to 8 ft.
.SUNDAY NIGHT...Northeast winds 15 to 25 kt becoming east. Chance
of showers in the evening, then slight chance of showers
overnight. Waves 4 to 6 ft occasionally to 8 ft.
.MONDAY...East winds 15 to 25 kt becoming northeast. Chance of
showers. Waves 3 to 5 ft.

$$