439
FZUS53 KDLH 210904
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
404 AM CDT Tue May 21 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.

LSZ140-141-211615-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
404 AM CDT Tue May 21 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 4 PM
CDT THIS AFTERNOON...
...GALE WARNING IN EFFECT FROM 4 PM CDT THIS AFTERNOON THROUGH
WEDNESDAY EVENING...

.TODAY...Northeast wind 20 to 25 knots with gales to around
35 knots. Chance of rain showers early in the afternoon. Rain
showers and slight chance of thunderstorms late in the afternoon.
Waves 1 to 2 feet building to 5 to 8 feet. Waves occasionally to
10 feet.
.TONIGHT...East wind up to 30 knots with gales to around 40 knots
becoming southeast 20 to 25 knots with gales to around 35 knots
early in the morning. Chance of thunderstorms in the evening.
Rain showers through the night. Chance of thunderstorms after
midnight. Waves 7 to 12 feet. Waves occasionally to 16 feet.
.WEDNESDAY...South wind 20 to 25 knots with gales to around
35 knots becoming southwest up to 30 knots with gales to around
40 knots in the late morning and afternoon. Chance of rain
showers and slight chance of thunderstorms in the morning, then
rain showers likely in the afternoon. Waves 7 to 12 feet. Waves
occasionally to 16 feet.
.WEDNESDAY NIGHT...West wind 20 to 25 knots. Gusts up to 35 knots
decreasing to 30 knots in the late evening and overnight. Rain
showers likely in the evening, then chance of rain showers after
midnight. Waves 7 to 10 feet subsiding to 4 to 7 feet in the late
evening and overnight. Waves occasionally to 13 feet. A gale
warning may be needed.

$$

LSZ142-143-211615-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
404 AM CDT Tue May 21 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 4 PM
CDT THIS AFTERNOON...
...GALE WARNING IN EFFECT FROM 4 PM CDT THIS AFTERNOON THROUGH
WEDNESDAY EVENING...

.TODAY...Northeast wind 5 to 10 knots rising to up to 30 knots
with gales to around 35 knots in the late morning and 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 6 to 9 feet. Waves occasionally to 12 feet.
.TONIGHT...Northeast wind up to 30 knots with gales to around
40 knots becoming southwest 20 to 25 knots with gales to around
35 knots early in the morning. Chance of thunderstorms in the
evening. Rain showers through the night. Chance of thunderstorms
after midnight. Waves 9 to 14 feet. Waves occasionally to
18 feet.
.WEDNESDAY...West wind 20 to 25 knots. Gales up to 40 knots
decreasing to 35 knots late in the afternoon. Slight chance of
thunderstorms in the morning. Chance of rain showers through the
day. Waves 8 to 11 feet subsiding to 4 to 7 feet in the late
morning and afternoon. Waves occasionally to 15 feet.
.WEDNESDAY NIGHT...West wind 15 to 20 knots. Gusts up to 35 knots
decreasing to 25 knots. Chance of rain showers through the night.
Waves 2 to 4 feet subsiding to 1 to 3 feet after midnight. A gale
warning may be needed.

$$

LSZ144-145-211615-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
404 AM CDT Tue May 21 2024

...DENSE FOG ADVISORY IN EFFECT UNTIL 6 AM CDT EARLY THIS
MORNING...
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 4 PM
CDT THIS AFTERNOON...
...GALE WARNING IN EFFECT FROM 4 PM CDT THIS AFTERNOON THROUGH
WEDNESDAY EVENING...

.TODAY...Northeast wind 5 to 10 knots rising to up to 30 knots
with gales to around 35 knots in the late morning and afternoon.
Rain showers likely and slight chance of thunderstorms in the
morning, then rain showers and chance of thunderstorms in the
afternoon. Waves 1 to 3 feet building to 7 to 10 feet. Waves
occasionally to 12 feet.
.TONIGHT...Northeast wind up to 30 knots with gales to around
40 knots becoming northwest with gales to around 35 knots early
in the morning. Thunderstorms likely in the evening. Rain showers
through the night. Chance of thunderstorms after midnight. Waves
8 to 13 feet. Waves occasionally to 17 feet.
.WEDNESDAY...West wind 20 to 25 knots. Gales up to 40 knots
decreasing to 35 knots late in the afternoon. Chance of rain
showers. Waves 7 to 10 feet subsiding to 4 to 6 feet late in the
afternoon. Waves occasionally to 12 feet.
.WEDNESDAY NIGHT...West wind 20 to 25 knots with gusts to around
30 knots easing to 10 to 15 knots with gusts to around 20 knots
early in the morning. Chance of rain showers in the evening.
Waves 4 to 6 feet subsiding to 2 to 4 feet after midnight. Waves
occasionally to 8 feet. A small craft advisory may be needed.

$$

LSZ146-211615-
Port Wing to Sand Island WI-
404 AM CDT Tue May 21 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 4 PM
CDT THIS AFTERNOON...
...GALE WARNING IN EFFECT FROM 4 PM CDT THIS AFTERNOON THROUGH
WEDNESDAY EVENING...

.TODAY...Northeast wind 10 to 15 knots with gusts to around
20 knots rising to 20 to 25 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 6 to 9 feet. Waves occasionally to
12 feet.
.TONIGHT...East wind up to 30 knots with gales to around 35 knots
becoming south 20 to 25 knots with gales to around 35 knots early
in the morning. Rain showers with thunderstorms likely in the
evening, then rain showers likely and chance of thunderstorms
after midnight. Waves 7 to 12 feet. Waves occasionally to
16 feet.
.WEDNESDAY...Southwest wind up to 30 knots. Gales up to 40 knots
decreasing to 35 knots late in the afternoon. Chance of rain
showers. Waves 7 to 10 feet. Waves occasionally to 12 feet.
.WEDNESDAY NIGHT...West wind 20 to 25 knots. Gusts up to
30 knots. Chance of rain showers in the evening. Waves 4 to
7 feet subsiding to 3 to 5 feet after midnight. Waves
occasionally to 9 feet. A small craft advisory may be needed.

$$

LSZ147-211615-
Sand Island to Bayfield WI-
404 AM CDT Tue May 21 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM CDT THIS AFTERNOON
THROUGH WEDNESDAY MORNING...
...GALE WARNING IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...

.TODAY...Northeast wind 10 to 15 knots with gusts to around
20 knots rising to 20 to 25 knots with gales to around 35 knots
in the afternoon. Chance of rain showers late in the morning.
Rain showers and slight chance of thunderstorms early in the
afternoon, then rain showers likely and chance of thunderstorms
late in the afternoon. Waves 1 to 2 feet building to 5 to 8 feet.
Waves occasionally to 10 feet.
.TONIGHT...East wind up to 30 knots with gales to around 35 knots
becoming south 20 to 25 knots with gales to around 35 knots early
in the morning. Rain showers in the evening. Chance of
thunderstorms through the night. Rain showers likely after
midnight. Waves 7 to 10 feet. Waves occasionally to 13 feet. A
gale warning may be needed.
.WEDNESDAY...Southwest wind up to 30 knots. Gales up to 40 knots
decreasing to 35 knots late in the afternoon. Chance of rain
showers. Waves 4 to 7 feet building to 6 to 9 feet in the late
morning and afternoon. Waves occasionally to 12 feet.
.WEDNESDAY NIGHT...West wind 15 to 20 knots. Gusts up to
30 knots. Chance of rain showers in the evening. Waves 4 to
7 feet subsiding to 3 to 5 feet after midnight. Waves
occasionally to 9 feet. A small craft advisory may be needed.

$$

LSZ150-211615-
Outer Apostle Islands Beyond 5 NM from Mainland-
404 AM CDT Tue May 21 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 4 PM
CDT THIS AFTERNOON...
...GALE WARNING IN EFFECT FROM 4 PM CDT THIS AFTERNOON THROUGH
WEDNESDAY EVENING...

.TODAY...Northeast wind 10 to 15 knots with gusts to around
20 knots rising to 20 to 25 knots with gales to around 35 knots
in the afternoon. Chance of rain showers late in the morning.
Rain showers likely in the afternoon. Chance of thunderstorms
late in the afternoon. Waves 1 to 2 feet building to 6 to 9 feet.
Waves occasionally to 11 feet.
.TONIGHT...East wind up to 30 knots becoming south 20 to 25 knots
early in the morning. Gusts up to 35 knots. 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.
.WEDNESDAY...Southwest wind up to 30 knots with gales to around
40 knots. Chance of rain showers. Waves 8 to 11 feet. Waves
occasionally to 14 feet.
.WEDNESDAY NIGHT...West wind 15 to 20 knots. Gusts up to 35 knots
decreasing to 25 knots in the late evening and overnight. Chance
of rain showers in the evening. Waves 5 to 8 feet subsiding to
4 to 6 feet after midnight. Waves occasionally to 10 feet. A gale
warning may be needed.

$$

LSZ121-211615-
Chequamegon Bay-Bayfield to Oak Point WI-
404 AM CDT Tue May 21 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM CDT THIS AFTERNOON
THROUGH WEDNESDAY MORNING...
...GALE WARNING IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...

.TODAY...Northeast wind 15 to 20 knots with gusts to around
30 knots. Chance of rain showers late in the morning. Rain
showers and slight chance of thunderstorms early in the
afternoon, then rain showers likely and chance of thunderstorms
late in the afternoon. Waves 1 to 3 feet.
.TONIGHT...East wind 15 to 20 knots with gusts to around 30 knots
becoming south 20 to 25 knots with gusts to around 30 knots early
in the morning. Rain showers with thunderstorms likely in the
evening, then rain showers likely and chance of thunderstorms
after midnight. Waves 2 to 4 feet.
.WEDNESDAY...Southwest wind 20 to 25 knots. Gusts up to 35 knots
increasing to 40 knots late in the morning, then decreasing to
35 knots in the afternoon. Chance of rain showers. Waves 2 to
4 feet.
.WEDNESDAY NIGHT...West wind 15 to 20 knots. Gusts up to 30 knots
decreasing to 20 knots. Chance of rain showers in the evening.
Waves 1 to 3 feet.

$$

LSZ148-211615-
Oak Point to Saxon Harbor WI-
404 AM CDT Tue May 21 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM CDT THIS AFTERNOON
THROUGH WEDNESDAY MORNING...
...GALE WARNING IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...

.TODAY...Northeast wind 15 to 20 knots with gusts to around
30 knots. Slight chance of rain showers late in the morning. Rain
showers and slight chance of thunderstorms early in the
afternoon, then rain showers likely and chance of thunderstorms
late in the afternoon. Waves 1 to 2 feet building to 4 to 6 feet.
Waves occasionally to 8 feet.
.TONIGHT...East wind 15 to 20 knots with gusts to around 30 knots
becoming south 20 to 25 knots with gales to around 35 knots early
in the morning. Rain showers in the evening. Chance of
thunderstorms through the night. Rain showers likely after
midnight. Waves 5 to 8 feet. Waves occasionally to 11 feet. A
gale warning may be needed.
.WEDNESDAY...Southwest wind 20 to 25 knots. Gusts up to 35 knots
increasing to 40 knots in the late morning and early afternoon,
then decreasing to 35 knots late in the afternoon. Chance of rain
showers. Waves 4 to 6 feet. Waves occasionally to 8 feet.
.WEDNESDAY NIGHT...West wind 15 to 20 knots. Gusts up to 30 knots
decreasing to 20 knots. Chance of rain showers in the evening.
Waves 3 to 5 feet subsiding to 1 to 3 feet early in the morning.
A small craft advisory may be needed.

$$

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

KML