573
FZUS53 KDLH 201503
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
1003 AM CDT Mon May 20 2024

For waters within five nautical miles of shore on Lake Superior.

Waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. Occasional wave height is the average of
the highest 1/10 of the wave spectrum.

LSZ140-141-202215-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
1003 AM CDT Mon May 20 2024

...GALE WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH WEDNESDAY
EVENING...

.REST OF TODAY...Northeast wind 5 to 10 knots. Rain showers
likely late in the morning, then chance of rain showers early in
the afternoon. Slight chance of rain showers late. Waves 1 foot
or less.
.TONIGHT...Northeast wind 5 to 10 knots becoming north late in
the evening, then becoming northwest after midnight becoming
north early in the morning. Mostly cloudy. Waves 1 foot or less.
.TUESDAY...Northeast wind 15 to 20 knots with gusts to around
30 knots. Chance of rain showers in the afternoon. Waves 1 to
2 feet building to 3 to 5 feet late in the afternoon. A small
craft advisory may be needed.
.TUESDAY NIGHT...Northeast wind up to 30 knots. Gusts up to
30 knots increasing to 35 knots in the late evening and
overnight. Rain showers and chance of thunderstorms. Waves 6 to
9 feet. Waves occasionally to 12 feet. A gale warning may be
needed.

$$

LSZ142-143-202215-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
1003 AM CDT Mon May 20 2024

...GALE WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH WEDNESDAY
EVENING...

.REST OF TODAY...Northeast wind 10 to 15 knots. Patchy fog late
in the morning. Chance of rain showers late in the morning, then
slight chance of rain showers early in the afternoon. Waves
1 foot or less.
.TONIGHT...Northeast wind 5 to 10 knots becoming north after
midnight. Mostly cloudy. Waves 1 foot or less.
.TUESDAY...Northeast wind 20 to 25 knots with gales to around
35 knots. Chance of rain showers in the morning, then rain
showers and slight chance of thunderstorms in the afternoon.
Waves 1 to 2 feet building to 4 to 7 feet. Waves occasionally to
9 feet. A gale warning may be needed.
.TUESDAY NIGHT...Northeast wind up to 30 knots with gales to
around 35 knots. Rain showers and chance of thunderstorms. Waves
8 to 11 feet. Waves occasionally to 15 feet. A gale warning may
be needed.

$$

LSZ144-145-202215-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
1003 AM CDT Mon May 20 2024

...GALE WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH WEDNESDAY
EVENING...

.REST OF TODAY...Northeast wind 5 to 10 knots. Patchy fog late in
the morning. Slight chance of rain showers late in the morning.
Waves 1 foot or less.
.TONIGHT...Northeast wind 5 to 10 knots. Patchy fog. Waves 1 foot
or less.
.TUESDAY...Northeast wind 10 to 15 knots with gusts to around
20 knots rising to up to 30 knots with gales to around 35 knots
in the afternoon. Chance of rain showers in the morning, then
rain showers and chance of thunderstorms in the afternoon. Waves
1 to 2 feet building to 4 to 7 feet. Waves occasionally to
9 feet. A gale warning may be needed.
.TUESDAY NIGHT...Northeast gales to 35 knots becoming north up to
30 knots with gales to around 35 knots after midnight. Rain
showers and chance of thunderstorms. Waves 7 to 12 feet. Waves
occasionally to 15 feet. A gale warning may be needed.

$$

LSZ146-202215-
Port Wing to Sand Island WI-
1003 AM CDT Mon May 20 2024

...GALE WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH WEDNESDAY
EVENING...

.REST OF TODAY...Northeast wind 5 to 10 knots. Patchy fog late in
the morning. Chance of rain showers late in the morning, then
slight chance of rain showers early in the afternoon. Waves
1 foot or less.
.TONIGHT...North wind 5 to 10 knots. Patchy fog. Waves 1 foot or
less.
.TUESDAY...Northeast wind 20 to 25 knots with gusts to around
30 knots. Chance of rain showers in the morning, then rain
showers and chance of thunderstorms in the afternoon. Waves 1 to
2 feet building to 4 to 7 feet. Waves occasionally to 9 feet. A
small craft advisory may be needed.
.TUESDAY NIGHT...Northeast wind up to 30 knots with gales to
around 35 knots becoming north 20 to 25 knots with gusts to
around 30 knots early in the morning. Rain showers and chance of
thunderstorms. Waves 8 to 11 feet. Waves occasionally to 15 feet.
A gale warning may be needed.

$$

LSZ147-202215-
Sand Island to Bayfield WI-
1003 AM CDT Mon May 20 2024

.REST OF TODAY...Northeast wind 5 to 10 knots becoming north
late. Patchy fog late in the morning. Chance of rain showers late
in the morning, then slight chance of rain showers early in the
afternoon. Waves 1 foot or less.
.TONIGHT...North wind 5 to 10 knots. Patchy fog after midnight.
Waves 1 foot or less.
.TUESDAY...Northeast wind 20 to 25 knots with gusts to around
30 knots. Patchy fog in the morning. Slight chance of rain
showers in the morning, then rain showers and slight chance of
thunderstorms in the afternoon. Waves 1 foot or less building to
4 to 7 feet. Waves occasionally to 9 feet. A small craft advisory
may be needed.
.TUESDAY NIGHT...Northeast wind up to 30 knots with gales to
around 35 knots becoming north 20 to 25 knots with gusts to
around 30 knots early in the morning. Rain showers and chance of
thunderstorms. Waves 8 to 11 feet. Waves occasionally to 14 feet.
A gale warning may be needed.

$$

LSZ150-202215-
Outer Apostle Islands Beyond 5 NM from Mainland-
1003 AM CDT Mon May 20 2024

...GALE WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH WEDNESDAY
EVENING...

.REST OF TODAY...Northeast wind 5 to 10 knots. Patchy fog late in
the morning. Chance of rain showers in the late morning and early
afternoon. Waves 1 foot or less.
.TONIGHT...North wind 5 to 10 knots easing to 5 knots after
midnight. Patchy fog after midnight. Waves 1 foot or less.
.TUESDAY...Northeast wind 20 to 25 knots with gusts to around
30 knots. Slight chance of rain showers in the morning, then rain
showers likely and slight chance of thunderstorms in the
afternoon. Waves 1 foot or less building to 4 to 7 feet. Waves
occasionally to 9 feet. A small craft advisory may be needed.
.TUESDAY NIGHT...Northeast wind up to 30 knots. Gusts up to
35 knots decreasing to 30 knots early in the morning. Rain
showers in the evening. Chance of thunderstorms through the
night. Rain showers likely after midnight. Waves 7 to 12 feet.
Waves occasionally to 16 feet. A gale warning may be needed.

$$

LSZ121-202215-
Chequamegon Bay-Bayfield to Oak Point WI-
1003 AM CDT Mon May 20 2024

.REST OF TODAY...Northeast wind 5 to 10 knots. Patchy fog late in
the morning. Chance of rain showers late in the morning, then
slight chance of rain showers early in the afternoon. Waves
1 foot or less.
.TONIGHT...Northeast wind 5 knots. Patchy fog. Waves 1 foot or
less.
.TUESDAY...Northeast wind 15 to 20 knots with gusts to around
25 knots. Chance of rain showers in the morning, then rain
showers and chance of thunderstorms in the afternoon. Waves 1 to
3 feet.
.TUESDAY NIGHT...Northeast wind 15 to 20 knots becoming southwest
early in the morning. Gusts up to 25 knots. Rain showers and
chance of thunderstorms. Waves 1 to 3 feet.

$$

LSZ148-202215-
Oak Point to Saxon Harbor WI-
1003 AM CDT Mon May 20 2024

.REST OF TODAY...Northeast wind 5 to 10 knots. Patchy fog late in
the morning. Chance of rain showers late in the morning, then
slight chance of rain showers early in the afternoon. Waves
1 foot or less.
.TONIGHT...North wind 5 knots. Patchy fog through the night.
Waves 1 foot or less.
.TUESDAY...Northeast wind 5 to 10 knots rising to 20 to 25 knots
with gusts to around 30 knots in the afternoon. Chance of rain
showers in the morning, then rain showers likely and chance of
thunderstorms in the afternoon. Waves 1 foot or less building to
4 to 6 feet. Waves occasionally to 7 feet. A small craft advisory
may be needed.
.TUESDAY NIGHT...East wind 20 to 25 knots with gusts to around
30 knots becoming southwest 15 to 20 knots with gusts to around
25 knots early in the morning. Rain showers and chance of
thunderstorms. Waves 4 to 7 feet. Waves occasionally to 9 feet. A
small craft advisory may be needed.

$$

Graphical marine forecasts are available online at:
weather.gov/greatlakes

BJH