049
FZUS53 KDLH 171931
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
231 PM CDT Thu Apr 17 2025

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.

LSZ140-141-180415-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
231 PM CDT Thu Apr 17 2025

...DENSE FOG ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 1 PM
CDT FRIDAY...

.TONIGHT...Northeast wind 10 to 15 knots with gusts to around
20 knots becoming north 5 to 10 knots with gusts to around
20 knots after midnight. Rain showers and slight chance of
thunderstorms in the evening. Rain showers likely after midnight.
Patchy dense fog in the late evening and overnight. Waves 1 to
3 feet.
.FRIDAY...North wind 5 to 10 knots. Gusts up to 20 knots in the
morning. Patchy dense fog in the morning. Slight chance of rain
showers in the afternoon. Waves 1 to 2 feet.
.FRIDAY NIGHT...North wind 5 to 10 knots. Slight chance of rain
showers in the evening. Waves 1 to 2 feet.
.SATURDAY...Northwest wind 5 to 10 knots becoming west in the
afternoon. Partly sunny. Waves 1 foot or less.

Note...Wave height forecasts are for ice free areas.

$$

LSZ142-180415-
Taconite Harbor to Silver Bay Harbor MN-
231 PM CDT Thu Apr 17 2025

...DENSE FOG ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 1 PM
CDT FRIDAY...

.TONIGHT...Northeast wind 5 to 10 knots with gusts to around
20 knots becoming north after midnight. Rain showers in the
evening. Slight chance of thunderstorms through the night. Rain
showers likely after midnight. Patchy dense fog in the late
evening and overnight. Waves 1 to 3 feet.
.FRIDAY...North wind 5 to 10 knots. Patchy dense fog in the
morning. Chance of rain showers in the afternoon. Waves 1 foot or
less.
.FRIDAY NIGHT...Northwest wind 5 knots. Slight chance of rain
showers through the night. Waves 1 foot or less.
.SATURDAY...Northwest wind 5 knots becoming west late in the
afternoon. Partly sunny. Waves 1 foot or less.

Note...Wave height forecasts are for ice free areas.

$$

LSZ143-180415-
Silver Bay Harbor to Two Harbors MN-
231 PM CDT Thu Apr 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING...
...DENSE FOG ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 1 PM
CDT FRIDAY...

.TONIGHT...Northeast wind 10 to 15 knots with gusts to around
25 knots becoming north 5 knots after midnight. Patchy dense fog
through the night. Rain showers in the evening. Slight chance of
thunderstorms through the night. Rain showers likely after
midnight. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late
evening and overnight.
.FRIDAY...North wind 5 to 10 knots. Patchy dense fog in the
morning. Slight chance of rain showers in the morning, then
chance of rain showers in the afternoon. Waves 1 foot or less.
.FRIDAY NIGHT...Northwest wind 5 to 10 knots. Slight chance of
rain showers through the night. Waves 1 foot or less.
.SATURDAY...Northwest wind 5 to 10 knots becoming west in the
afternoon. Mostly sunny. Waves 1 foot or less.

Note...Wave height forecasts are for ice free areas.

$$

LSZ144-145-180415-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
231 PM CDT Thu Apr 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING...
...DENSE FOG ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 10 AM
CDT FRIDAY...

.TONIGHT...Northeast wind 10 to 15 knots with gusts to around
25 knots becoming north 5 to 10 knots after midnight. Patchy
dense fog through the night. Rain showers in the evening. Slight
chance of thunderstorms through the night. Rain showers likely
after midnight. Waves 2 to 4 feet subsiding to 1 to 2 feet in the
late evening and overnight.
.FRIDAY...North wind 5 to 10 knots. Patchy dense fog in the
morning. Slight chance of rain showers in the morning, then
chance of rain showers in the afternoon. Waves 1 foot or less.
.FRIDAY NIGHT...Northwest wind 5 to 10 knots. Slight chance of
rain showers in the evening. Waves 1 to 2 feet.
.SATURDAY...Northwest wind 5 to 10 knots. Mostly sunny. Waves
1 foot or less.

Note...Wave height forecasts are for ice free areas.

$$

LSZ146-180415-
Port Wing to Sand Island WI-
231 PM CDT Thu Apr 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING...
...DENSE FOG ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 10 AM
CDT FRIDAY...

.TONIGHT...Northeast wind 10 to 15 knots with gusts to around
25 knots becoming north 5 to 10 knots after midnight. Patchy
dense fog until early morning. Areas of dense fog late in the
night. Rain showers in the evening. Slight chance of thunderstorms
through the night. Rain showers likely after midnight. Waves 1 to
3 feet subsiding to 1 to 2 feet in the late evening and
overnight.
.FRIDAY...Northwest wind 5 to 10 knots. Areas of dense fog in the
morning. Slight chance of rain showers in the morning, then
chance of rain showers in the afternoon. Waves 1 foot or less.
.FRIDAY NIGHT...Northwest wind 5 to 10 knots. Slight chance of
rain showers through the night. Waves 1 foot or less.
.SATURDAY...West wind 5 to 10 knots. Mostly sunny. Waves 1 foot
or less.

Note...Wave height forecasts are for ice free areas.

$$

LSZ147-180415-
Sand Island to Bayfield WI-
231 PM CDT Thu Apr 17 2025

...DENSE FOG ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 10 AM
CDT FRIDAY...

.TONIGHT...Northeast wind 5 to 10 knots becoming northwest after
midnight. Patchy dense fog through the night. Rain showers in the
evening. Slight chance of thunderstorms through the night. Rain
showers likely after midnight. Waves 1 to 2 feet.
.FRIDAY...Northwest wind 5 to 10 knots. Patchy dense fog in the
morning. Slight chance of rain showers in the morning, then
chance of rain showers in the afternoon. Waves 1 foot or less.
.FRIDAY NIGHT...Northwest wind 5 to 10 knots. Chance of rain
showers in the evening, then slight chance of rain showers after
midnight. Waves 1 foot or less.
.SATURDAY...West wind 5 to 10 knots easing to 5 knots late in the
afternoon. Mostly sunny. Waves 1 foot or less.

Note...Wave height forecasts are for ice free areas.

$$

LSZ121-180415-
Chequamegon Bay-Bayfield to Oak Point WI-
231 PM CDT Thu Apr 17 2025

...DENSE FOG ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 10 AM
CDT FRIDAY...

.TONIGHT...Northeast wind 5 to 10 knots with gusts to around
20 knots becoming northwest after midnight. Patchy dense fog
through the night. Rain showers in the evening. Chance of
thunderstorms through the night. Rain showers likely after
midnight. Waves 1 to 2 feet.
.FRIDAY...North wind 5 to 10 knots. Patchy dense fog in the
morning. Chance of rain showers through the day. Waves 1 foot or
less.
.FRIDAY NIGHT...Northwest wind 5 to 10 knots. Chance of rain
showers in the evening, then slight chance of rain showers after
midnight. Waves 1 foot or less.
.SATURDAY...Northwest wind 5 to 10 knots. Mostly sunny. Waves
1 foot or less.

Note...Wave height forecasts are for ice free areas.

$$

LSZ148-180415-
Oak Point to Saxon Harbor WI-
231 PM CDT Thu Apr 17 2025

...DENSE FOG ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 10 AM
CDT FRIDAY...

.TONIGHT...East wind 5 to 10 knots with gusts to around 20 knots
becoming northwest after midnight. Patchy dense fog through the
night. Rain showers in the evening. Chance of thunderstorms
through the night. Rain showers likely after midnight. Waves 1 to
2 feet.
.FRIDAY...North wind 5 to 10 knots. Patchy dense fog. Chance of
rain showers. Waves 1 foot or less.
.FRIDAY NIGHT...Northwest wind 5 to 10 knots. Chance of rain
showers in the evening, then slight chance of rain showers after
midnight. Waves 1 to 2 feet.
.SATURDAY...Northwest wind 5 to 10 knots. Mostly sunny. Waves
1 to 2 feet.

Note...Wave height forecasts are for ice free areas.

$$

LSZ150-180415-
Outer Apostle Islands Beyond 5 NM from Mainland-
231 PM CDT Thu Apr 17 2025

...DENSE FOG ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 10 AM
CDT FRIDAY...

.TONIGHT...Northeast wind 5 to 10 knots with gusts to around
20 knots becoming north after midnight. Patchy dense fog until
early morning. Areas of dense fog late in the night. Rain showers
in the evening. Slight chance of thunderstorms through the night.
Rain showers likely after midnight. Waves 1 to 2 feet.
.FRIDAY...Northwest wind 5 to 10 knots. Areas of dense fog in the
morning. Slight chance of rain showers in the morning, then
chance of rain showers in the afternoon. Waves 1 foot or less.
.FRIDAY NIGHT...Northwest wind 5 to 10 knots. Chance of rain
showers in the evening, then slight chance of rain showers after
midnight. Waves 1 to 2 feet.
.SATURDAY...Northwest wind 5 to 10 knots becoming west late in
the afternoon. Mostly sunny. Waves 1 foot or less.

Note...Wave height forecasts are for ice free areas.

$$

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

NLy