710
FZUS53 KDLH 210221
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
921 PM 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.

LSZ140-141-211015-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
921 PM CDT Mon May 20 2024

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

.REST OF TONIGHT...North wind 5 knots becoming northwest after
midnight, then becoming north toward daybreak. Patchy dense fog
in the late evening and early morning. Areas of dense fog toward
daybreak. Slight chance of rain showers toward daybreak. Waves
1 foot or less.
.TUESDAY...Northeast wind 10 to 15 knots rising to up to 30 knots
with gales to around 35 knots in the afternoon. Patchy dense fog
in the morning. Chance of rain showers in the afternoon. Waves
1 to 2 feet building to 5 to 8 feet. Waves occasionally to
10 feet. A gale warning may be needed.
.TUESDAY NIGHT...Northeast wind up to 30 knots with gales to
around 40 knots becoming east gales to 35 knots with gales to
around 40 knots after midnight. Rain showers and chance of
thunderstorms. Waves 7 to 12 feet. Waves occasionally to 16 feet.
A gale warning may be needed.
.WEDNESDAY...South wind 20 to 25 knots with gusts to around
30 knots becoming southwest up to 30 knots with gales to around
35 knots in the late morning and afternoon. Rain showers and
slight chance of thunderstorms in the morning, then rain showers
likely and slight chance of thunderstorms in the afternoon. Waves
7 to 12 feet. Waves occasionally to 16 feet. A gale warning may
be needed.

$$

LSZ142-143-211015-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
921 PM CDT Mon May 20 2024

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

.REST OF TONIGHT...North wind 5 knots. Patchy fog late in the
evening. Areas of dense fog after midnight, then patchy fog
toward daybreak. Slight chance of rain showers through the night.
Waves 1 foot or less.
.TUESDAY...Northeast wind 5 to 10 knots rising to up to 30 knots
with gales to around 35 knots in the late morning and afternoon.
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 to 2 feet building to 6 to 9 feet. Waves
occasionally to 12 feet. A gale warning may be needed.
.TUESDAY NIGHT...Northeast gales to 35 knots with gales to around
40 knots easing to up to 30 knots with gales to around 40 knots
late in the evening, then rising to gales to 35 knots with gales
to around 40 knots after midnight. Rain showers and chance of
thunderstorms. Waves 9 to 14 feet. Waves occasionally to 18 feet.
A gale warning may be needed.
.WEDNESDAY...West wind 20 to 25 knots. Gusts up to 30 knots
increasing to 35 knots in the late morning and early afternoon,
then decreasing to 30 knots late in the afternoon. Rain showers
and slight chance of thunderstorms in the morning, then rain
showers likely in the afternoon. Waves 8 to 11 feet subsiding to
4 to 7 feet in the late morning and afternoon. Waves occasionally
to 15 feet. A gale warning may be needed.

$$

LSZ144-145-211015-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
921 PM CDT Mon May 20 2024

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

.REST OF TONIGHT...Northeast wind 10 to 15 knots easing to
5 knots after midnight. Patchy fog through the night. Slight
chance of rain showers late in the evening. Chance of rain
showers after midnight, then slight chance of rain showers toward
daybreak. Waves 1 foot or less.
.TUESDAY...Northeast wind 5 to 10 knots rising to gales to
35 knots. Patchy fog in the morning. Chance of rain showers 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. A gale warning may be needed.
.TUESDAY NIGHT...Northeast gales to 35 knots with gales to around
40 knots easing to up to 30 knots with gales to around 45 knots
late in the evening, then rising to gales to 35 knots with gales
to around 45 knots after midnight becoming northwest early in the
morning. Rain showers and chance of thunderstorms. Waves 8 to
13 feet. Waves occasionally to 17 feet. A gale warning may be
needed.
.WEDNESDAY...West gales to 35 knots easing to up to 30 knots with
gales to around 35 knots in the late morning and afternoon. Rain
showers and slight chance of thunderstorms in the morning, then
chance of rain showers in the afternoon. Waves 7 to 10 feet
subsiding to 4 to 6 feet late in the afternoon. Waves
occasionally to 12 feet. A gale warning may be needed.

$$

LSZ146-211015-
Port Wing to Sand Island WI-
921 PM CDT Mon May 20 2024

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

.REST OF TONIGHT...North wind 5 knots. Patchy fog late in the
evening, then areas of dense fog after midnight. Patchy fog
toward daybreak. Chance of rain showers after midnight. Waves
1 foot or less.
.TUESDAY...Northeast wind 5 to 10 knots rising to gales to
35 knots. Patchy fog in the morning. Slight chance of rain
showers in the morning, then rain showers likely and chance of
thunderstorms in the afternoon. Waves 1 to 2 feet building to
6 to 9 feet. Waves occasionally to 12 feet. A gale warning may be
needed.
.TUESDAY NIGHT...Northeast wind up to 30 knots with gales to
around 40 knots becoming southeast with gales to around 35 knots
early in the morning. Rain showers and chance of thunderstorms.
Waves 7 to 12 feet. Waves occasionally to 16 feet. A gale warning
may be needed.
.WEDNESDAY...Southwest wind up to 30 knots. Gusts up to 35 knots
until late afternoon. Rain showers and slight chance of
thunderstorms in the morning, then chance of rain showers in the
afternoon. Waves 6 to 9 feet. Waves occasionally to 12 feet. A
gale warning may be needed.

$$

LSZ147-211015-
Sand Island to Bayfield WI-
921 PM CDT Mon May 20 2024

.REST OF TONIGHT...North wind 5 to 10 knots. Patchy fog late in
the evening, then areas of dense fog after midnight. Patchy fog
toward daybreak. Slight chance of rain showers after midnight.
Chance of rain showers toward daybreak. Waves 1 foot or less.
.TUESDAY...Northeast wind 10 to 15 knots rising to up to 30 knots
with gales to around 35 knots in the afternoon. Patchy fog in the
morning. Slight chance of rain showers in the morning, then rain
showers likely and slight chance of thunderstorms in the
afternoon. Waves 1 to 2 feet building to 5 to 8 feet. Waves
occasionally to 10 feet. A gale warning may be needed.
.TUESDAY NIGHT...East wind up to 30 knots becoming southeast
early in the morning. Gusts up to 35 knots. Rain showers and
chance of thunderstorms. Waves 7 to 10 feet. Waves occasionally
to 13 feet. A gale warning may be needed.
.WEDNESDAY...Southwest wind up to 30 knots. Gusts up to 30 knots
increasing to 35 knots in the late morning and early afternoon.
Rain showers and slight chance of thunderstorms in the morning,
then chance of rain showers in the afternoon. Waves 4 to 7 feet
building to 6 to 9 feet in the late morning and afternoon. Waves
occasionally to 12 feet. A gale warning may be needed.

$$

LSZ150-211015-
Outer Apostle Islands Beyond 5 NM from Mainland-
921 PM CDT Mon May 20 2024

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

.REST OF TONIGHT...Northeast wind 5 to 10 knots becoming north
after midnight. Patchy fog late in the evening, then areas of
dense fog after midnight. Slight chance of rain showers after
midnight. Waves 1 foot or less.
.TUESDAY...Northeast wind 10 to 15 knots rising to gales to
35 knots. Patchy fog in the morning. Rain showers likely and
slight chance of thunderstorms in the afternoon. Waves 1 to
2 feet building to 6 to 9 feet. Waves occasionally to 11 feet. A
gale warning may be needed.
.TUESDAY NIGHT...East wind up to 30 knots rising to gales to
35 knots after midnight, then becoming southeast early in the
morning. Rain showers and chance of thunderstorms. Waves 7 to
12 feet. Waves occasionally to 16 feet. A gale warning may be
needed.
.WEDNESDAY...Southwest wind up to 30 knots with gales to around
40 knots becoming west late in the afternoon. Slight chance of
thunderstorms in the morning. Chance of rain showers through the
day. Waves 7 to 10 feet. Waves occasionally to 14 feet. A gale
warning may be needed.

$$

LSZ121-211015-
Chequamegon Bay-Bayfield to Oak Point WI-
921 PM CDT Mon May 20 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY AFTERNOON THROUGH
LATE WEDNESDAY NIGHT...

.REST OF TONIGHT...Northeast wind 5 knots. Patchy fog late in the
evening. Areas of dense fog after midnight. Slight chance of rain
showers after midnight. Chance of rain showers toward daybreak.
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. Areas of dense
fog in the morning. Chance of rain showers in the morning, then
rain showers likely and chance of thunderstorms in the afternoon.
Waves 1 to 3 feet.
.TUESDAY NIGHT...East wind 20 to 25 knots becoming south up to
30 knots early in the morning. Rain showers and chance of
thunderstorms. Waves 2 to 4 feet.
.WEDNESDAY...Southwest wind up to 30 knots. Gusts up to 35 knots
in the late morning and early afternoon decreasing to 30 knots.
Slight chance of thunderstorms in the morning. Chance of rain
showers through the day. Waves 2 to 4 feet. A gale warning may be
needed.

$$

LSZ148-211015-
Oak Point to Saxon Harbor WI-
921 PM CDT Mon May 20 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY AFTERNOON THROUGH
LATE WEDNESDAY NIGHT...

.REST OF TONIGHT...Northeast wind 5 knots. Patchy fog late in the
evening. Areas of dense fog after midnight. Slight chance of rain
showers after midnight. Chance of rain showers toward daybreak.
Waves 1 foot or less.
.TUESDAY...Northeast wind 5 knots rising to 20 to 25 knots with
gusts to around 30 knots. Areas of dense fog in the morning.
Slight 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 in the afternoon. Waves
occasionally to 8 feet.
.TUESDAY NIGHT...East wind 20 to 25 knots becoming south up to
30 knots early in the morning. Rain showers and chance of
thunderstorms. Waves 4 to 7 feet. Waves occasionally to 10 feet.
.WEDNESDAY...Southwest wind up to 30 knots. Gusts up to 35 knots
in the late morning and early afternoon. Rain showers and slight
chance of thunderstorms in the morning, then chance of rain
showers in the afternoon. Waves 4 to 6 feet. Waves occasionally
to 8 feet. A gale warning may be needed.

$$

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

Britt