443
FZUS53 KDLH 212021
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
321 PM 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.

LSZ140-141-220430-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
321 PM CDT Tue May 21 2024

...DENSE FOG ADVISORY IN EFFECT UNTIL 7 AM CDT WEDNESDAY...
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM CDT THIS AFTERNOON...
...GALE WARNING IN EFFECT THROUGH WEDNESDAY EVENING...

.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
late in the night. Patchy dense fog in the evening. Widespread
dense fog after midnight. Patchy dense fog late in the night.
Rain showers and chance of thunderstorms through the night. Waves
7 to 10 feet subsiding to 5 to 8 feet late in the night. Waves
occasionally to 13 feet.
.WEDNESDAY...Southwest wind up to 30 knots with gales to around
40 knots becoming west 20 to 25 knots with gales to around
40 knots late in the afternoon. Areas of dense fog in the
morning. Slight chance of thunderstorms in the morning. Chance of
rain showers through the day. Waves 5 to 8 feet building to 7 to
12 feet in the late morning and afternoon. Waves occasionally to
15 feet.
.WEDNESDAY NIGHT...West wind 20 to 25 knots. Gusts up to 35 knots
decreasing to 25 knots. Chance of rain showers in the evening.
Waves 5 to 8 feet subsiding to 3 to 5 feet early in the morning.
Waves occasionally to 10 feet. A gale warning may be needed.
.THURSDAY...West wind 15 to 20 knots. Gusts up to 25 knots in the
morning. Mostly sunny. Waves 3 to 5 feet. A small craft advisory
may be needed.

$$

LSZ142-143-220430-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
321 PM CDT Tue May 21 2024

...DENSE FOG ADVISORY IN EFFECT UNTIL 7 AM CDT WEDNESDAY...
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM CDT THIS AFTERNOON...
...GALE WARNING IN EFFECT THROUGH WEDNESDAY EVENING...

.TONIGHT...Northeast wind up to 30 knots with gales to around
40 knots becoming south 20 to 25 knots with gusts to around
30 knots late in the night. Areas of dense fog early in the
evening. Patchy dense fog in the late evening and overnight.
Chance of thunderstorms in the evening. Rain showers through the
night. Chance of thunderstorms after midnight. Waves 8 to 11 feet
subsiding to 4 to 7 feet late in the night. Waves occasionally to
14 feet.
.WEDNESDAY...West 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. Patchy dense
fog in the morning. Chance of rain showers and slight chance of
thunderstorms through the day. Waves 4 to 7 feet. Waves
occasionally to 9 feet.
.WEDNESDAY NIGHT...West wind 15 to 20 knots. Gusts up to 30 knots
decreasing to 25 knots in the late evening and overnight. Chance
of rain showers in the evening. Waves 2 to 4 feet subsiding to
1 to 3 feet early in the morning. A small craft advisory may be
needed.
.THURSDAY...West wind 10 to 15 knots with gusts to around
20 knots easing to 5 to 10 knots with gusts to around 20 knots in
the afternoon. Slight chance of rain showers in the afternoon.
Waves 1 to 2 feet.

$$

LSZ144-145-220430-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
321 PM CDT Tue May 21 2024

...DENSE FOG ADVISORY IN EFFECT UNTIL 3 AM CDT WEDNESDAY...
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM CDT THIS AFTERNOON...
...GALE WARNING IN EFFECT THROUGH WEDNESDAY EVENING...

.TONIGHT...Northeast wind up to 30 knots with gales to around
40 knots becoming west with gales to around 35 knots late in the
night. Areas of dense fog in the evening. Patchy dense fog after
midnight. Rain showers until early morning. Chance of
thunderstorms through the night. Chance of rain showers late in
the night. Waves 7 to 10 feet subsiding to 4 to 6 feet late in
the night. Waves occasionally to 13 feet.
.WEDNESDAY...West wind 20 to 25 knots. Gales up to 40 knots
decreasing to 35 knots in the afternoon. Chance of rain showers.
Waves 4 to 7 feet. Waves occasionally to 9 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 2 to 4 feet subsiding to 1 to 3 feet early in the morning.
A small craft advisory may be needed.
.THURSDAY...West wind 10 to 15 knots. Slight chance of showers
and thunderstorms in the afternoon. Waves 1 to 2 feet.

$$

LSZ146-220430-
Port Wing to Sand Island WI-
321 PM CDT Tue May 21 2024

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM CDT THIS AFTERNOON...
...GALE WARNING IN EFFECT THROUGH WEDNESDAY EVENING...

.TONIGHT...East wind up to 30 knots with gales to around 35 knots
easing to 15 to 20 knots with gusts to around 30 knots after
midnight, then becoming south 20 to 25 knots with gales to around
35 knots late in the night. Areas of dense fog in the evening.
Patchy fog after midnight. Rain showers in the evening. Chance of
thunderstorms through the night. Rain showers likely after
midnight. Waves 6 to 9 feet subsiding to 4 to 6 feet late in the
night. Waves occasionally to 12 feet.
.WEDNESDAY...Southwest wind up to 30 knots. Gales up to 45 knots
decreasing to 35 knots. Patchy fog in the morning. Slight chance
of showers and thunderstorms in the morning, then chance of rain
showers in the afternoon. Waves 6 to 9 feet. Waves occasionally
to 11 feet.
.WEDNESDAY NIGHT...West wind 15 to 20 knots. Gusts up to
30 knots. Chance of rain showers in the evening. Waves 3 to
5 feet. Waves occasionally to 7 feet. A small craft advisory may
be needed.
.THURSDAY...West wind 10 to 15 knots with gusts to around
20 knots easing to 10 knots late in the afternoon. Slight chance
of showers and thunderstorms in the afternoon. Waves 1 to 3 feet.

$$

LSZ147-220430-
Sand Island to Bayfield WI-
321 PM CDT Tue May 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING...
...GALE WARNING IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...

.TONIGHT...East wind 20 to 25 knots with gales to around 35 knots
becoming south with gales to around 35 knots late in the night.
Patchy fog through the night. Rain showers and chance of
thunderstorms in the evening. Rain showers likely and chance of
thunderstorms after midnight. Waves 5 to 8 feet subsiding to 3 to
5 feet late in the night. Waves occasionally to 10 feet.
.WEDNESDAY...Southwest wind up to 30 knots. Gales up to 45 knots
decreasing to 35 knots. Slight chance of thunderstorms in the
morning. Chance of rain showers through the day. Waves 5 to
8 feet. Waves occasionally to 11 feet.
.WEDNESDAY NIGHT...West wind 15 to 20 knots. Gusts up to
30 knots. Chance of rain showers in the evening. Waves 3 to
5 feet. A small craft advisory may be needed.
.THURSDAY...West wind 10 to 15 knots. Gusts up to 20 knots early
in the morning. Slight chance of showers and thunderstorms in the
afternoon. Waves 1 to 3 feet.

$$

LSZ150-220430-
Outer Apostle Islands Beyond 5 NM from Mainland-
321 PM CDT Tue May 21 2024

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM CDT THIS AFTERNOON...
...GALE WARNING IN EFFECT THROUGH WEDNESDAY EVENING...

.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 late
in the night. Patchy fog through the night. Rain showers in the
evening. Chance of thunderstorms through the night. Rain showers
likely after midnight. Waves 7 to 10 feet subsiding to 4 to
6 feet late in the night. Waves occasionally to 13 feet.
.WEDNESDAY...Southwest wind up to 30 knots. Gales up to 45 knots
decreasing to 40 knots in the afternoon. Slight chance of showers
and thunderstorms in the morning, then chance of rain showers in
the afternoon. Waves 7 to 10 feet. Waves occasionally to 12 feet.
.WEDNESDAY NIGHT...West wind 15 to 20 knots. Gusts up to 30 knots
decreasing to 25 knots in the late evening and overnight. Chance
of rain showers in the evening. Waves 4 to 6 feet. Waves
occasionally to 8 feet. A small craft advisory may be needed.
.THURSDAY...West wind 10 to 15 knots. Gusts up to 20 knots in the
morning. Slight chance of showers and thunderstorms in the
afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the
afternoon.

$$

LSZ121-220430-
Chequamegon Bay-Bayfield to Oak Point WI-
321 PM CDT Tue May 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING...
...GALE WARNING IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...

.TONIGHT...East wind 15 to 20 knots becoming southwest 20 to
25 knots late in the night. Gusts up to 30 knots. Patchy fog
through the night. Rain showers in the evening. Chance of
thunderstorms through the night. Rain showers likely after
midnight. Waves 1 to 3 feet.
.WEDNESDAY...Southwest wind 20 to 25 knots becoming west 10 to
20 knots late in the afternoon. Gusts up to 35 knots. Slight
chance of rain showers in the morning, then chance of rain
showers in the afternoon. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...West wind 15 to 20 knots. Gusts up to 25 knots
decreasing to 20 knots after midnight. Chance of rain showers in
the evening. Waves 1 to 2 feet.
.THURSDAY...West wind 5 to 10 knots becoming northwest late in
the afternoon. Slight chance of showers and thunderstorms in the
afternoon. Waves 1 foot or less.

$$

LSZ148-220430-
Oak Point to Saxon Harbor WI-
321 PM CDT Tue May 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING...
...GALE WARNING IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...

.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 late
in the night. Patchy fog through the night. Rain showers in the
evening. Chance of thunderstorms through the night. Chance of
rain showers after midnight. Waves 5 to 8 feet subsiding to 3 to
5 feet after midnight. Waves occasionally to 11 feet.
.WEDNESDAY...Southwest wind 20 to 25 knots. Gales up to 40 knots
decreasing to 35 knots late in the afternoon. Slight chance of
rain showers in the morning, then chance of rain showers in the
afternoon. Waves 3 to 5 feet. Waves occasionally to 7 feet.
.WEDNESDAY NIGHT...Southwest 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 subsiding to 1 to 2 feet in the late
evening and overnight.
.THURSDAY...West wind 10 to 15 knots becoming northwest 5 to
10 knots late in the afternoon. Slight chance of showers and
thunderstorms in the afternoon. Waves 1 to 2 feet.

$$

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

Melde