National Weather Service United States Department of Commerce

 

Welcome to the new NWS Duluth Marine Page. Any questions or comments can be sent to nws.duluth@noaa.gov.

 

Marine Observations for Lake Superior
Local Radars
Duluth         Marquette  
DLH Reflectivity       MQT Reflectivity
Reflectivity       Reflectivity

 

 

 

 

 

Nearshore Forecast


668
FZUS53 KDLH 022036
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
336 PM CDT Sat Nov 2 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.

LSZ140-141-030415-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
336 PM CDT Sat Nov 2 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY AFTERNOON THROUGH
LATE SUNDAY NIGHT...

.TONIGHT...Southwest wind 5 to 10 knots becoming east late in the
night. Mostly cloudy then becoming partly cloudy after midnight
then becoming mostly cloudy. Waves 1 foot or less.
.SUNDAY...Southeast wind 10 to 15 knots. Gusts up to 25 knots.
Chance of rain in the morning, then rain likely in the afternoon.
Waves 1 to 2 feet building to 2 to 4 feet late in the afternoon.
.SUNDAY NIGHT...Southeast wind 15 to 20 knots with gusts to
around 30 knots easing to 5 to 10 knots early in the morning.
Rain. Waves 4 to 6 feet. Waves occasionally to 7 feet.
.MONDAY...Southeast wind 5 to 10 knots becoming west late in the
afternoon. Rain. Waves 1 to 3 feet.

$$

LSZ143-030415-
Silver Bay Harbor to Two Harbors MN-
336 PM CDT Sat Nov 2 2024

.TONIGHT...Southwest wind 5 knots becoming east in the late
evening and overnight. Mostly cloudy then becoming partly cloudy
after midnight then becoming mostly cloudy. Waves 1 foot or less.
.SUNDAY...East wind 10 to 15 knots. Gusts up to 20 knots late in
the afternoon. Chance of rain in the morning, then rain likely in
the afternoon. Waves 1 to 3 feet.
.SUNDAY NIGHT...East wind 10 to 15 knots. Gusts up to 20 knots in
the evening. Rain. Waves 1 to 3 feet.
.MONDAY...Northeast wind 5 knots becoming west with gusts to
around 20 knots in the afternoon. Rain. Waves 1 to 2 feet.

$$

LSZ142-030415-
Taconite Harbor to Silver Bay Harbor MN-
336 PM CDT Sat Nov 2 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY AFTERNOON THROUGH
LATE SUNDAY NIGHT...

.TONIGHT...Southwest wind 5 knots becoming east after midnight.
Mostly cloudy then becoming partly cloudy after midnight then
becoming mostly cloudy. Waves 1 foot or less.
.SUNDAY...Southeast wind 10 to 15 knots. Gusts up to 25 knots.
Chance of rain in the morning, then rain likely in the afternoon.
Waves 1 to 2 feet building to 1 to 3 feet late in the afternoon.
.SUNDAY NIGHT...East wind 10 to 15 knots. Gusts up to 25 knots.
Rain. Waves 3 to 5 feet.
.MONDAY...East wind 5 knots becoming northwest with gusts to
around 20 knots in the afternoon. Rain. Waves 1 to 2 feet.

$$

LSZ144-145-030415-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
336 PM CDT Sat Nov 2 2024

.TONIGHT...Southwest wind 5 knots becoming east in the late
evening and overnight. Partly cloudy early in the evening then
becoming mostly cloudy. Waves 1 foot or less.
.SUNDAY...East wind 10 to 15 knots. Gusts up to 20 knots late in
the morning increasing to 25 knots, then decreasing to 20 knots
late in the afternoon. Chance of rain in the morning, then rain
likely in the afternoon. Waves 1 to 2 feet.
.SUNDAY NIGHT...East wind 10 to 15 knots. Gusts up to 20 knots
early in the evening. Rain likely. Waves 1 to 2 feet.
.MONDAY...East wind 5 to 10 knots becoming west 10 to 15 knots
with gusts to around 20 knots in the afternoon. Rain. Waves 1 to
2 feet.

$$

LSZ146-030415-
Port Wing to Sand Island WI-
336 PM CDT Sat Nov 2 2024

.TONIGHT...Southwest wind 5 knots becoming southeast in the late
evening and overnight. Partly cloudy until early morning then
becoming mostly cloudy. Waves 1 foot or less.
.SUNDAY...Southeast wind 10 to 15 knots. Gusts up to 20 knots in
the late morning and afternoon. Chance of rain in the morning,
then rain likely in the afternoon. Waves 1 to 2 feet.
.SUNDAY NIGHT...Southeast wind 10 to 15 knots. Gusts up to
20 knots early in the evening. Rain. Waves 1 to 2 feet.
.MONDAY...Southeast wind 5 knots becoming west with gusts to
around 20 knots in the afternoon. Rain. Waves 1 foot or less.

$$

LSZ147-030415-
Sand Island to Bayfield WI-
336 PM CDT Sat Nov 2 2024

.TONIGHT...Southwest wind 5 knots becoming southeast late in the
night. Partly cloudy until early morning then becoming mostly
cloudy. Waves 1 foot or less.
.SUNDAY...Southeast wind 10 to 15 knots. Gusts up to 25 knots.
Chance of rain in the morning, then rain likely in the afternoon.
Waves 1 to 2 feet.
.SUNDAY NIGHT...Southeast wind 10 to 15 knots. Gusts up to
25 knots. Rain. Waves 1 to 2 feet.
.MONDAY...South wind 5 to 10 knots becoming west with gusts to
around 20 knots late in the afternoon. Rain. Waves 1 foot or
less.

$$

LSZ150-030415-
Outer Apostle Islands Beyond 5 NM from Mainland-
336 PM CDT Sat Nov 2 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH
SUNDAY EVENING...

.TONIGHT...South wind 5 to 10 knots becoming southeast after
midnight. Partly cloudy until early morning then becoming mostly
cloudy. Waves 1 foot or less.
.SUNDAY...Southeast wind 10 knots rising to 15 to 20 knots with
gusts to around 25 knots in the late morning and afternoon.
Chance of rain in the morning, then rain likely in the afternoon.
Waves 1 to 2 feet building to 2 to 4 feet late in the afternoon.
.SUNDAY NIGHT...Southeast wind 15 to 20 knots with gusts to
around 25 knots easing to 5 to 10 knots after midnight. Rain.
Waves 2 to 4 feet subsiding to 1 to 3 feet after midnight.
.MONDAY...South wind 5 to 10 knots becoming west 10 to 15 knots
with gusts to around 20 knots late in the afternoon. Rain. Waves
1 to 2 feet.

$$

LSZ121-030415-
Chequamegon Bay-Bayfield to Oak Point WI-
336 PM CDT Sat Nov 2 2024

.TONIGHT...South wind 5 knots becoming southeast late in the
night. Partly cloudy until early morning then becoming mostly
cloudy. Waves 1 foot or less.
.SUNDAY...Southeast wind 10 to 15 knots. Gusts up to 20 knots in
the late morning and afternoon. Rain likely through the day.
Waves 1 to 2 feet.
.SUNDAY NIGHT...Southeast wind 10 to 15 knots with gusts to
around 20 knots becoming south 5 knots after midnight. Rain.
Waves 1 to 2 feet.
.MONDAY...South wind 5 to 10 knots becoming west with gusts to
around 20 knots late in the afternoon. Rain. Waves 1 foot or
less.

$$

LSZ148-030415-
Oak Point to Saxon Harbor WI-
336 PM CDT Sat Nov 2 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH
SUNDAY EVENING...

.TONIGHT...South wind 5 to 10 knots. Gusts up to 20 knots in the
late evening and overnight. Partly cloudy until early morning
then becoming mostly cloudy. Waves 1 foot or less.
.SUNDAY...Southeast wind 10 to 15 knots. Gusts up to 20 knots
increasing to 25 knots in the late morning and afternoon. Rain
likely through the day. Waves 1 to 2 feet.
.SUNDAY NIGHT...Southeast wind 10 to 15 knots with gusts to
around 25 knots becoming south 5 knots early in the morning.
Rain. Waves 1 to 2 feet.
.MONDAY...South wind 5 to 10 knots becoming west with gusts to
around 20 knots late in the afternoon. Rain. Waves 1 foot or
less.

$$

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

KML


Duluth, MichiganLSZ140 Grand Portage to Grank Marais MN LSZ141 Grand Marais to Taconite Harbor MN LSZ142 Taconite Harbor to Silver Bay Harbor MN LSZ143 Silver Bay Harbor to Two Harbors MN LSZ144 Two Harbors to Duluth MN LSZ145 Duluth MN to Port Wing WI LSZ146 Port Wing to Sand Island WI LSZ147 Sand Island to Bayfield WI LSZ148 Oak Point to Saxon Harbor WI LSZ121 Chequamegon Bay - Bayfield to Oak Point WI LSZ140 Grand Portage to Grank Marais MN LSZ141 Grand Marais to Taconite Harbor MN LSZ142 Taconite Harbor to Silver Bay Harbor MN LSZ143 Silver Bay Harbor to Two Harbors MN LSZ144 Two Harbors to Duluth MN LSZ145 Duluth MN to Port Wing WI LSZ146 Port Wing to Sand Island WI LSZ147 Sand Island to Bayfield WI LSZ148 Oak Point to Saxon Harbor WI LSZ121 Chequamegon Bay - Bayfield to Oak Point WI

Open Waters Forecast


328
FZUS63 KMQT 021944
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
344 PM EDT Sat Nov 2 2024

For waters beyond 5 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.

.SYNOPSIS... 30.4 inch high pressure over the lower Great Lakes
will reach New England by Sunday morning. A 29.6 inch low pressure
trough will organize Sunday over the central Plains. This low
lifts through western Lake Superior Monday, then continues
northeast while deepening to 29.3 inches over Hudson Bay by
Tuesday morning. Meanwhile, a secondary 29.5 inch low develops in
the southern Plains and lifts north into the Upper Great Lakes
Tuesday. This low quickly skirts northeast, leaving high pressure
near 30.2 inches in its wake on Wednesday. High pressure builds to
30.3 inches Thursday while weak 30.1 inch troughing descends from
central Canada late into Friday.

LSZ162-030345-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
344 PM EDT Sat Nov 2 2024 /244 PM CDT Sat Nov 2 2024/

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast late. Waves
calm to 2 feet.
.SUNDAY...Southeast winds 10 to 20 knots becoming east 15 to
25 knots late. A chance of showers through early afternoon, then
showers likely by mid afternoon. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 15 to 25 knots diminishing to
5 to 15 knots. Showers. Waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 1 to 3 feet.
.MONDAY...East winds 5 to 15 knots becoming west 10 to 20 knots
by mid afternoon. Showers. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots veering northwest after
midnight. A chance of showers. Waves calm to 2 feet.
.TUESDAY...North winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots becoming west 10 to
20 knots. Waves calm to 2 feet.
.THURSDAY...West winds 15 to 25 knots. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.

$$

LSZ263-030345-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
344 PM EDT Sat Nov 2 2024

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots backing southeast in the
afternoon, then increasing to 20 to 30 knots late. A chance of
showers through early afternoon, then showers likely by mid
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY NIGHT...Southeast winds 20 to 30 knots diminishing to 10
to 20 knots. A chance of showers through midnight, then showers
after midnight. Waves building to 5 to 8 feet occasionally to 10
feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.MONDAY...Southeast winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. Showers. Waves subsiding to 1 to
3 feet.
.MONDAY NIGHT...West winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight. A chance of showers. Waves subsiding to
calm to 2 feet.
.TUESDAY...North winds 10 to 20 knots. A chance of showers
through early afternoon, then showers likely by mid afternoon.
Waves calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots backing northwest
after midnight. A chance of rain showers through midnight. Waves
calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots. Waves building to 1 to 3 feet.
.THURSDAY...West winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet.

$$

LSZ264-030345-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
344 PM EDT Sat Nov 2 2024

...GALE WARNING IN EFFECT FROM SUNDAY EVENING THROUGH LATE SUNDAY
NIGHT...

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots. Waves building to 1 to
3 feet.
.SUNDAY...South winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon, then becoming southeast 20 to 30 knots late. A
chance of showers through early afternoon, then showers likely by
mid afternoon. Waves building to 4 to 7 feet occasionally to
9 feet.
.SUNDAY NIGHT...Southeast gales to 35 knots diminishing to 15 to
25 knots late. Showers likely. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.
.MONDAY...Southeast winds 10 to 20 knots veering south by mid
afternoon. Showers. Waves subsiding to 2 to 4 feet.
.MONDAY NIGHT...West winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight. A chance of showers. Waves subsiding to
1 to 3 feet.
.TUESDAY...North winds 10 to 20 knots. A chance of showers
through early afternoon, then showers likely by mid afternoon.
Waves 1 to 3 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots. A chance of rain
showers through midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots increasing to 10 to
20 knots. Waves building to 1 to 3 feet.
.THURSDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. Waves building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ265-030345-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
344 PM EDT Sat Nov 2 2024

.LATE THIS AFTERNOON...South winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...South winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon, then becoming southeast 20 to 30 knots late. A
chance of showers through early afternoon, then showers likely by
mid afternoon. Waves building to 4 to 7 feet occasionally to
9 feet.
.SUNDAY NIGHT...Southeast winds 20 to 30 knots diminishing to
15 to 25 knots late. Showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.MONDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots by mid afternoon. Showers. Waves subsiding to calm to
2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots veering northwest after
midnight. Showers. Waves calm to 2 feet.
.TUESDAY...North winds 10 to 20 knots. Showers. Waves calm to
2 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots backing northwest
after midnight. Showers likely through midnight. Waves calm to
2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots backing west. Waves
calm to 2 feet.
.THURSDAY...West winds 15 to 25 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.

$$

LSZ266-030345-
Lake Superior East of a line from Manitou Island to Marquette MI
and West of a line from Grand Marais MI to the US/Canadian Border
Beyond 5NM from shore-
344 PM EDT Sat Nov 2 2024

...GALE WARNING IN EFFECT FROM SUNDAY EVENING THROUGH LATE SUNDAY
NIGHT...

.LATE THIS AFTERNOON...South winds 10 to 20 knots. Waves 1 to
3 feet building to 2 to 4 feet.
.TONIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots late. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.
.SUNDAY...South winds 15 to 25 knots becoming southeast 20 to
30 knots late. A chance of showers through early afternoon, then
showers likely by mid afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet.
.SUNDAY NIGHT...Southeast gales to 35 knots becoming south 20 to
30 knots late. Showers. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.
.MONDAY...South winds 15 to 25 knots. Showers. Waves subsiding to
2 to 4 feet.
.MONDAY NIGHT...Southwest winds 10 to 20 knots veering west after
midnight. Showers. Waves subsiding to 1 to 3 feet.
.TUESDAY...North winds 10 to 20 knots. Showers. Waves 1 to
3 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots. Showers through
midnight. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.THURSDAY...West winds 15 to 25 knots. A chance of showers. Waves
building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ267-030345-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
344 PM EDT Sat Nov 2 2024

...GALE WARNING IN EFFECT FROM SUNDAY EVENING THROUGH LATE SUNDAY
NIGHT...

.LATE THIS AFTERNOON...South winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...South winds 10 to 20 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.SUNDAY...South winds 15 to 25 knots becoming southeast 20 to
30 knots late. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY NIGHT...Southeast gales to 35 knots becoming south winds
20 to 30 knots late. Showers. Waves building to 4 to 8 feet
occasionally to 10 feet.
.MONDAY...Southeast winds 15 to 25 knots veering south by mid
afternoon. Showers. Waves subsiding to 2 to 4 feet.
.MONDAY NIGHT...South winds 15 to 25 knots becoming west 10 to
20 knots after midnight. Showers. Waves subsiding to calm to
2 feet.
.TUESDAY...Northwest winds 10 to 20 knots veering north by mid
afternoon. Showers. Waves building to 1 to 3 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Showers through midnight, then a chance
of showers after midnight. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots backing west. Waves
subsiding to calm to 2 feet.
.THURSDAY...West winds 15 to 25 knots. A chance of showers. Waves
building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ261-030345-
MAFOR 0221/
Superior West 11300 11200 11300 13310 11320 11336. Waves 1 foot
or less tonight. Waves 1 to 3 feet Sunday.

Superior North Central 14410 11410 11420 11430 11330. A chance of
showers Sunday afternoon. Waves 1 to 3 feet tonight. Waves 1 to 3
feet building to 3 to 6 feet Sunday.

Superior South Central 15420 11430 11436. Waves 1 to 3 feet
building to 3 to 5 feet Sunday.

Superior East 15420 11420 11330. A chance of showers Sunday
afternoon. Waves 2 to 4 feet tonight building to 3 to 5 feet
Sunday.

$$

BW

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

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