032
FZUS53 KDLH 220239
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
939 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.

LSZ140-141-221015-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
939 PM CDT Tue May 21 2024

...GALE WARNING IN EFFECT THROUGH WEDNESDAY EVENING...
...DENSE FOG ADVISORY IN EFFECT UNTIL 7 AM CDT WEDNESDAY...

.REST OF TONIGHT...East wind 20 to 25 knots with gales to around
40 knots becoming southeast with gales to around 35 knots toward
daybreak. Patchy dense fog through the night. Chance of
thunderstorms late in the evening. Rain showers through the
night. Chance of thunderstorms after midnight. Waves 7 to
10 feet. Waves occasionally to 12 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. Patchy 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 2 to 4 feet. A small craft advisory
may be needed.

$$

LSZ142-143-221015-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
939 PM CDT Tue May 21 2024

...GALE WARNING IN EFFECT THROUGH WEDNESDAY EVENING...
...DENSE FOG ADVISORY IN EFFECT UNTIL 7 AM CDT WEDNESDAY...

.REST OF 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 toward daybreak. Areas of dense fog in the late
evening and early morning. Patchy dense fog toward daybreak.
Chance of thunderstorms late in the evening. Rain showers through
the night. Chance of thunderstorms after midnight. Waves 7 to
10 feet subsiding to 4 to 7 feet toward daybreak. Waves
occasionally to 13 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.

$$

LSZ144-145-221015-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
939 PM CDT Tue May 21 2024

...GALE WARNING IN EFFECT THROUGH WEDNESDAY EVENING...
...DENSE FOG ADVISORY IN EFFECT UNTIL 3 AM CDT WEDNESDAY...

.REST OF TONIGHT...Northeast gales to 35 knots with gales to
around 40 knots easing to 20 to 25 knots with gusts to around
30 knots after midnight, then becoming west up to 30 knots with
gales to around 35 knots toward daybreak. Areas of dense fog late
in the evening. Patchy dense fog after midnight. Rain showers in
the late evening and early morning. Chance of thunderstorms
through the night. Chance of rain showers toward daybreak. Waves
6 to 9 feet subsiding to 4 to 6 feet toward daybreak. Waves
occasionally to 12 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 2 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.

$$

LSZ146-221015-
Port Wing to Sand Island WI-
939 PM CDT Tue May 21 2024

...GALE WARNING IN EFFECT THROUGH WEDNESDAY EVENING...

.REST OF TONIGHT...East wind 15 to 20 knots with gales to around
35 knots becoming south 20 to 25 knots with gales to around
35 knots toward daybreak. Patchy fog through the night. Rain
showers late in the evening. Chance of thunderstorms through the
night. Rain showers likely after midnight. Waves 5 to 8 feet.
Waves occasionally to 11 feet.
.WEDNESDAY...Southwest wind up to 30 knots. Gales up to 45 knots
decreasing to 35 knots. 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.

$$

LSZ147-221015-
Sand Island to Bayfield WI-
939 PM CDT Tue May 21 2024

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 AM CDT WEDNESDAY...
...GALE WARNING IN EFFECT FROM 7 AM CDT WEDNESDAY THROUGH
WEDNESDAY EVENING...

.REST OF TONIGHT...East wind 15 to 20 knots with gales to around
35 knots becoming south 20 to 25 knots with gales to around
35 knots toward daybreak. Patchy fog through the night. Rain
showers late in the evening. Chance of thunderstorms through the
night. Rain showers likely after midnight. Waves 4 to 7 feet
subsiding to 2 to 4 feet toward daybreak. Waves occasionally to
9 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.

$$

LSZ150-221015-
Outer Apostle Islands Beyond 5 NM from Mainland-
939 PM CDT Tue May 21 2024

...GALE WARNING IN EFFECT THROUGH WEDNESDAY EVENING...

.REST OF TONIGHT...East wind 20 to 25 knots with gales to around
35 knots becoming south with gales to around 35 knots toward
daybreak. Patchy fog through the night. Rain showers late 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
toward daybreak. Waves occasionally to 12 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 6 to 9 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.

$$

LSZ121-221015-
Chequamegon Bay-Bayfield to Oak Point WI-
939 PM CDT Tue May 21 2024

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 AM CDT WEDNESDAY...
...GALE WARNING IN EFFECT FROM 7 AM CDT WEDNESDAY THROUGH
WEDNESDAY EVENING...

.REST OF TONIGHT...Northeast wind 10 to 15 knots becoming
southeast 15 to 20 knots after midnight, then becoming southwest
20 to 25 knots toward daybreak. Gusts up to 30 knots. Patchy fog
through the night. Rain showers late 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.

$$

LSZ148-221015-
Oak Point to Saxon Harbor WI-
939 PM CDT Tue May 21 2024

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 AM CDT WEDNESDAY...
...GALE WARNING IN EFFECT FROM 7 AM CDT WEDNESDAY THROUGH
WEDNESDAY EVENING...

.REST OF TONIGHT...East wind 10 to 15 knots with gusts to around
30 knots becoming southeast 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 toward daybreak. Patchy fog through the
night. Rain showers late in the evening. Chance of thunderstorms
through the night. Chance of rain showers after midnight. Waves
5 to 8 feet subsiding to 2 to 4 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.
.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

Britt