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Marine Observations for Lake Superior
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Nearshore Forecast


000
FZUS53 KDLH 011002
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
402 AM CST Fri Mar 1 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.

LSZ140-141-011715-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
402 AM CST Fri Mar 1 2024

.TODAY...Southeast wind 5 to 10 knots becoming south 10 to
15 knots with gusts to around 20 knots in the late morning and
afternoon. Sunny. Waves 1 to 2 feet.
.TONIGHT...Southwest wind 10 to 15 knots becoming west 5 to
10 knots early in the morning. Partly cloudy. Waves 1 to 3 feet.
.SATURDAY...Northwest wind 5 to 10 knots becoming east 10 to
15 knots with gusts to around 20 knots in the afternoon. Mostly
cloudy. Waves 1 to 2 feet.
.SATURDAY NIGHT...Northeast wind 15 to 20 knots with gusts to
around 25 knots. Slight chance of rain through the night. Waves
3 to 5 feet. A small craft advisory may be needed.

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

$$

LSZ142-143-011715-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
402 AM CST Fri Mar 1 2024

.TODAY...Southeast wind 5 to 10 knots becoming south in the
afternoon. Sunny. Waves 1 to 2 feet.
.TONIGHT...Southwest wind 5 to 10 knots becoming west early in
the morning. Mostly cloudy in the evening then becoming partly
cloudy. Waves 1 to 2 feet.
.SATURDAY...Northwest wind 5 knots becoming north late in the
morning, then becoming northeast 15 to 20 knots in the afternoon.
Mostly cloudy. Waves 1 to 3 feet.
.SATURDAY NIGHT...Northeast wind 15 to 20 knots with gusts to
around 25 knots. Slight chance of rain. Waves 3 to 5 feet. A
small craft advisory may be needed.

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

$$

LSZ144-145-011715-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
402 AM CST Fri Mar 1 2024

.TODAY...South wind 10 to 15 knots with gusts to around 20 knots
becoming southwest with gusts to around 20 knots late in the
afternoon. Sunny. Waves 1 to 2 feet.
.TONIGHT...Southwest wind 5 to 10 knots. Partly cloudy. Waves
1 to 2 feet.
.SATURDAY...West wind 5 knots becoming northeast late in the
morning, then rising to 15 to 20 knots in the afternoon. Mostly
cloudy. Waves 1 foot or less building to 2 to 4 feet late in the
afternoon.
.SATURDAY NIGHT...Northeast wind 15 to 20 knots. Gusts up to
25 knots until early morning. Slight chance of rain. Waves 3 to
5 feet. A small craft advisory may be needed.

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

$$

LSZ146-011715-
Port Wing to Sand Island WI-
402 AM CST Fri Mar 1 2024

.TODAY...South wind 5 to 10 knots. Gusts up to 20 knots in the
late morning and afternoon. Sunny. Waves 1 foot or less.
.TONIGHT...Southwest wind 5 to 10 knots. Partly cloudy. Waves
1 to 2 feet.
.SATURDAY...Southwest wind 5 knots becoming west late in the
morning, then becoming northeast 10 to 15 knots in the afternoon.
Mostly cloudy. Waves 1 to 3 feet.
.SATURDAY NIGHT...East wind 15 to 20 knots. Slight chance of rain
through the night. Waves 2 to 4 feet.

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

$$

LSZ147-011715-
Sand Island to Bayfield WI-
402 AM CST Fri Mar 1 2024

.TODAY...South wind 5 to 10 knots. Gusts up to 20 knots in the
late morning and afternoon. Sunny. Waves 1 foot or less.
.TONIGHT...Southwest wind 5 to 10 knots. Partly cloudy. Waves
1 foot or less.
.SATURDAY...Southwest wind 5 to 10 knots becoming east 10 to
15 knots in the afternoon. Mostly cloudy. Waves 1 to 2 feet.
.SATURDAY NIGHT...East wind 10 to 15 knots. Slight chance of rain
after midnight. Waves 1 to 3 feet.

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

$$

LSZ121-011715-
Chequamegon Bay-Bayfield to Oak Point WI-
402 AM CST Fri Mar 1 2024

.TODAY...South wind 10 to 15 knots. Gusts up to 20 knots
increasing to 25 knots in the afternoon. Sunny. Waves 1 foot or
less.
.TONIGHT...Southwest wind 5 to 10 knots. Partly cloudy. Waves
1 foot or less.
.SATURDAY...South wind 5 knots becoming east late in the
afternoon. Mostly cloudy. Waves 1 foot or less.
.SATURDAY NIGHT...East wind 5 to 10 knots becoming southeast
early in the morning. Slight chance of rain after midnight. Waves
1 to 2 feet.

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

$$

LSZ148-011715-
Oak Point to Saxon Harbor WI-
402 AM CST Fri Mar 1 2024

.TODAY...South wind 10 to 15 knots. Gusts up to 20 knots
increasing to 25 knots in the late morning and afternoon. Sunny.
Waves 1 to 2 feet.
.TONIGHT...Southwest wind 10 to 15 knots. Gusts up to 20 knots
until early morning. Partly cloudy. Waves 1 foot or less.
.SATURDAY...South wind 5 to 10 knots becoming east 10 to 15 knots
in the afternoon. Mostly cloudy. Waves 1 to 2 feet.
.SATURDAY NIGHT...East wind 10 to 15 knots with gusts to around
20 knots becoming southeast 5 to 10 knots with gusts to around
20 knots after midnight. Mostly cloudy. Waves 1 to 3 feet.

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

$$

LSZ150-011715-
Outer Apostle Islands Beyond 5 NM from Mainland-
402 AM CST Fri Mar 1 2024

.TODAY...South wind 10 to 15 knots. Gusts up to 20 knots. Sunny.
Waves 1 to 2 feet.
.TONIGHT...Southwest wind 10 to 15 knots. Gusts up to 20 knots
early in the evening. Partly cloudy in the evening then becoming
mostly cloudy. Waves 1 to 2 feet.
.SATURDAY...Southwest wind 5 to 10 knots becoming south late in
the morning, then becoming east 10 to 15 knots in the afternoon.
Mostly cloudy. Waves 1 to 2 feet.
.SATURDAY NIGHT...East wind 10 to 15 knots. Gusts up to 20 knots
in the evening. Slight chance of rain after midnight. Waves 2 to
4 feet. A small craft advisory may be needed.

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

$$

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

Rothstein

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


000
FZUS63 KMQT 010845
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
345 AM EST Fri Mar 1 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...A 29.4 inch low over Saskatchewan tracks east today,
weakening to 29.6 inches as it moves into northern Ontario this
evening. As the low continues northeast toward James Bay tonight, a
29.8 inch trough sets up over western Lake Superior, passing over
the lake through Saturday morning. A 29.3 inch low develops over the
Northern Plains Saturday night, moving northeast toward Manitoba
on Sunday. The low then continues northeast through northern
Ontario Sunday night and Monday, reaching Hudson Bay Monday night.
30.0 inch ridging extending from the Northern Plains builds in
behind the low Monday night into Tuesday.

LSZ162-011645-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
345 AM EST Fri Mar 1 2024 /245 AM CST Fri Mar 1 2024/

.EARLY THIS MORNING...Southeast winds 5 to 15 knots. Waves 1 to
3 feet.
.TODAY...South winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Waves subsiding to calm to 2 feet.
.TONIGHT...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing east by late
morning, then increasing to 10 to 20 knots by mid afternoon.
Waves building to 1 to 3 feet.
.SATURDAY NIGHT...East winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A slight chance of rain showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...East winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. A chance of rain showers. Waves building to
4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY NIGHT...South winds 20 to 30 knots veering southwest
after midnight. Rain showers likely in the evening, then a chance
of rain showers, possibly mixed with snow after midnight. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY...West winds 15 to 25 knots becoming north 20 to
30 knots. A chance of snow showers, possibly mixed with rain.
Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.TUESDAY...Northwest winds 15 to 25 knots backing west. Waves
subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-011645-
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-
345 AM EST Fri Mar 1 2024

.EARLY THIS MORNING...South winds 10 to 20 knots. Waves 1 to 3
feet.
.TODAY...South winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Waves subsiding to calm to 2 feet, then
building to 1 to 3 feet.
.TONIGHT...Southwest winds 10 to 20 knots. Waves building to 2 to
4 feet.
.SATURDAY...Southwest winds 5 to 15 knots backing northeast by
late morning, then veering east by mid afternoon. Waves subsiding
to calm to 2 feet.
.SATURDAY NIGHT...East winds 10 to 20 knots veering southeast
after midnight. A slight chance of rain showers after midnight.
Waves building to 2 to 4 feet.
.SUNDAY...East winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. A chance of rain showers. Waves building to
7 to 10 feet occasionally to 13 feet.
.SUNDAY NIGHT...Southeast winds 20 to 30 knots with a few gale
force gusts to 35 knots possible veering southwest after
midnight. A chance of rain showers. Waves subsiding to 4 to 7 feet
occasionally to 9 feet.
.MONDAY...West winds 15 to 25 knots veering north. A chance of
rain and snow showers. Waves subsiding to 2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots backing west. Waves
subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-011645-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
345 AM EST Fri Mar 1 2024

.EARLY THIS MORNING...South winds 10 to 20 knots. Waves 3 to 5
feet occasionally to 7 feet.
.TODAY...South winds 10 to 20. Waves subsiding to 2 to 4 feet.
.TONIGHT...South winds 10 to 20 knots becoming southwest 15 to
25 knots by midnight, then diminishing to 10 to 20 knots late.
Waves building to 3 to 6 feet occasionally to 8 feet, then
subsiding to 2 to 4 feet.
.SATURDAY...Southwest winds 5 to 15 knots veering north by late
morning, then veering east by mid afternoon. Waves subsiding to
calm to 2 feet.
.SATURDAY NIGHT...East winds 10 to 20 knots veering southeast
after midnight. A slight chance of rain showers after midnight.
Waves building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Southeast winds 20 to 30 knots with a few gale force
gusts to 35 knots possible late. Waves building to 8 to 11 feet
occasionally to 14 feet.
.SUNDAY NIGHT...Southeast winds 20 to 30 knots with a few gale
force gusts to 35 knots possible veering southwest after
midnight. A chance of rain showers. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.MONDAY...West winds 15 to 25 knots veering northwest. A chance
of rain showers, possibly mixed with snow. Waves subsiding to
2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots becoming west 15 to
25 knots. Waves 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-011645-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
345 AM EST Fri Mar 1 2024

.EARLY THIS MORNING...South winds 10 to 20 knots. Waves 1 to
3 feet.
.TODAY...South winds 10 to 20 knots. Waves subsiding to calm to
2 feet, then building to 2 to 4 feet.
.TONIGHT...South winds 10 to 20 knots. Waves subsiding to 1 to
3 feet.
.SATURDAY...Southwest winds 5 to 15 knots backing south by late
morning, then becoming east 10 to 20 knots by mid afternoon.
Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Waves building to 2 to 4 feet.
.SUNDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet.
.SUNDAY NIGHT...Southeast winds 20 to 30 knots veering southwest
after midnight. A chance of rain showers. Waves subsiding to 2 to
4 feet.
.MONDAY...North winds 10 to 20 knots becoming northwest 15 to
25 knots. A chance of rain showers. A chance of snow showers.
Waves subsiding to calm to 2 feet, then building to 1 to 3 feet.
.TUESDAY...West winds 15 to 25 knots. Waves 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-011645-
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-
345 AM EST Fri Mar 1 2024

.EARLY THIS MORNING...South winds 15 to 25 knots. Waves 3 to
5 feet occasionally to 7 feet.
.TODAY...South winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. Waves building to 4 to 7 feet occasionally to
9 feet.
.TONIGHT...South winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. Waves building to 5 to 8 feet occasionally
to 10 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...Southwest winds 10 to 20 knots backing south by late
morning, then diminishing to 5 to 15 knots by mid afternoon.
Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY...Southeast winds 20 to 30 knots with a few gale force
gusts to 35 knots possible in the afternoon. Waves building to 7
to 10 feet occasionally to 13 feet.
.SUNDAY NIGHT...Southeast winds 20 to 30 knots with a few gale
force gusts to 35 knots possible veering southwest after
midnight. A chance of rain showers. Waves subsiding to 4 to 7 feet
occasionally to 9 feet.
.MONDAY...Northeast winds 15 to 25 knots backing west. A chance
of rain showers. Waves subsiding to 2 to 4 feet.
.TUESDAY...West winds 15 to 25 knots increasing to 20 to
30 knots. Waves building to 3 to 5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-011645-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
345 AM EST Fri Mar 1 2024

.EARLY THIS MORNING...South winds 15 to 25 knots. Waves 2 to
4 feet.
.TODAY...South winds 15 to 25 knots increasing to 20 to 30 knots.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.TONIGHT...South winds 20 to 30 knots diminishing to 15 to
25 knots by midnight, then veering southwest late. Waves building
to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to
6 feet occasionally to 8 feet.
.SATURDAY...Southwest winds 15 to 25 knots becoming south 10 to
20 knots. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY...Southeast winds 20 to 30 knots with a few gale force
gusts to 35 knots possible late. Waves building to 5 to 8 feet
occasionally to 10 feet.
.SUNDAY NIGHT...Southeast winds 20 to 30 knots with a few gale
force gusts to 35 knots veering south after midnight. A chance of
rain showers. Waves building to 6 to 9 feet occasionally to 11
feet, then subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY...East winds 15 to 25 knots veering west. A chance of
rain showers. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.
.TUESDAY...West winds 15 to 25 knots. A chance of rain showers.
Waves building to 3 to 5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-011645-
MAFOR 0110/
Superior West 11400 11420 12410 11420 13520. Waves 1 to 3 feet.

Superior North Central 14420 11420 11430 11530 11520. Waves 2 to
5 feet.

Superior South Central 12420 13430 13420. Waves 2 to 5 feet.

Superior East 11420 12430 14440 11530. Waves 3 to 6 feet today.
Waves 5 to 8 feet tonight.

$$

Jablonski

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

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