322
FZUS63 KMQT 242101
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EST Wed Dec 24 2025

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...

Weak 30.1 inch troughing over Lake Superior this evening will give
way to 30.4 inch ridging on Thursday as a 30.5 inch high transits
northern Ontario. Low pressure of 29.6 inches moves east along the
southern end of the Great Lakes Basin on Friday. Another low of 29.6
inches then lifts over Lower Michigan Saturday night and Sunday. By
Monday, a strong high pressure of at least 30.6 inches will reside
over the Great Plains as the low deepens to 29.1 inches over Quebec,
yielding a tight pressure gradient across the Great Lakes.


LSZ162-250900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EST Wed Dec 24 2025 /300 PM CST Wed Dec 24 2025/

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...North winds 5 to 15 knots increasing to 10 to 20 knots
by midnight, then becoming northeast 15 to 25 knots late. Waves
building to 2 to 4 feet.
.THURSDAY...Northeast winds 15 to 25 knots veering east. A chance
of snow showers in the afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY NIGHT...Southeast winds 15 to 25 knots becoming south
10 to 20 knots late. A chance of snow showers in the evening. A
chance of sleet. Snow showers, possibly mixed with freezing rain
after midnight. Waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet.
.FRIDAY...South winds 5 to 15 knots veering west in the
afternoon. A chance of snow showers, possibly mixed with rain in
the morning. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast in the
afternoon. A chance of rain showers. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots becoming west 10 to
20 knots after midnight. A chance of rain showers. Waves building
to 1 to 3 feet.
.SUNDAY...Northwest gales to 45 knots. A chance of rain showers.
A chance of snow showers. Heavy freezing spray. Waves building to
6 to 9 feet occasionally to 11 feet.
.MONDAY...Northwest gales to 45 knots. Heavy freezing spray.
Waves subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-250900-
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-
400 PM EST Wed Dec 24 2025

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves 1 to
3 feet.
.TONIGHT...North winds 10 to 20 knots veering northeast late.
Waves building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Northeast winds 10 to 20 knots veering east by late
morning, then increasing to 15 to 25 knots by mid afternoon. A
chance of snow showers in the afternoon. Waves subsiding to 2 to
4 feet, then building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY NIGHT...Southeast winds 20 to 30 knots veering south
late. A chance of snow showers in the evening, then snow showers,
possibly mixed with rain and sleet after midnight. Waves building
to 6 to 9 feet occasionally to 11 feet.
.FRIDAY...South winds 15 to 25 knots becoming west 5 to 15 knots
in the afternoon. A chance of snow showers, possibly mixed with
rain and sleet in the morning. Waves subsiding to 2 to 4 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots. Waves building to 1 to
3 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. A chance of rain showers. A chance
of snow showers after midnight. Waves 1 to 3 feet.
.SUNDAY...West gales to 40 knots becoming northwest storm force
winds to 55 knots. A chance of rain showers. A chance of snow
showers. Heavy freezing spray. Waves building to 10 to 14 feet
occasionally to 18 feet.
.MONDAY...Northwest storm force winds to 55 knots diminishing to
gales to 40 knots. Heavy freezing spray. Waves building to 11 to
15 feet occasionally to 19 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-250900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EST Wed Dec 24 2025

...GALE WARNING IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
AFTERNOON...

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves 1 to
3 feet.
.TONIGHT...Northwest winds 10 to 20 knots becoming north 15 to
25 knots by midnight. Freezing spray after midnight. Waves
building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Northeast winds 10 to 20 knots veering east by late
morning, then increasing to 15 to 25 knots by mid afternoon.
Freezing spray in the morning. A chance of snow showers in the
afternoon. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...Southeast winds 20 to 30 knots increasing to
gales to 35 knots by midnight. Snow showers likely in the
evening, then snow showers after midnight. Waves building to 9 to
12 feet occasionally to 15 feet.
.FRIDAY...South gales to 35 knots diminishing to 15 to 25 knots
in the afternoon. Snow showers likely in the morning. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. Waves subsiding to
1 to 3 feet.
.SATURDAY...South winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of rain showers. A chance of
snow showers after midnight. Waves 3 to 5 feet occasionally to
7 feet.
.SUNDAY...West gales to 40 knots becoming northwest storm force
winds to 60 knots. A chance of snow showers, possibly mixed with
rain, then snow showers likely. Heavy freezing spray. Waves
building to 15 to 20 feet occasionally to 25 feet.
.MONDAY...North storm force winds to 60 knots becoming northwest
storm force winds to 50 knots. Heavy freezing spray. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-250900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EST Wed Dec 24 2025

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...West winds 15 to 25 knots veering north by midnight,
then increasing to 20 to 30 knots late. Waves building to 3 to
6 feet occasionally to 8 feet.
.THURSDAY...Northeast winds 15 to 25 knots veering east by late
morning, then increasing to 20 to 30 knots by mid afternoon. A
chance of snow showers in the afternoon. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 2 to 4 feet.
.THURSDAY NIGHT...Southeast winds 20 to 30 knots increasing to
30 knots with a few gale force gusts to 35 knots possible by
midnight. A chance of snow showers in the evening, then snow
showers, possibly mixed with sleet after midnight. Waves building
to 7 to 10 feet occasionally to 13 feet.
.FRIDAY...South gales to 35 knots diminishing to 15 to 25 knots
in the afternoon. Snow showers likely in the morning, then a
slight chance of rain and snow showers in the afternoon. Waves
subsiding to 2 to 4 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves building to 2 to 4 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots. A chance of rain
showers. A chance of snow showers after midnight. Waves subsiding
to 1 to 3 feet.
.SUNDAY...West storm force winds to 50 knots becoming northwest
storm force winds to 60 knots. A chance of rain showers. Snow
showers. Heavy freezing spray. Waves building to 15 to 20 feet
occasionally to 25 feet.
.MONDAY...Northwest storm force winds to 60 knots. Heavy freezing
spray. A chance of snow showers. Waves building to 17 to 22 feet
occasionally to 28 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-250900-
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-
400 PM EST Wed Dec 24 2025

...GALE WARNING IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
AFTERNOON...

.LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. Waves 3 to
5 feet occasionally to 7 feet.
.TONIGHT...West winds 10 to 20 knots becoming north 15 to
25 knots by midnight, then increasing to 20 to 30 knots late.
Freezing spray after midnight. Waves subsiding to 2 to 4 feet,
then building to 5 to 8 feet occasionally to 10 feet.
.THURSDAY...Northeast winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then veering east by mid afternoon.
Freezing spray in the morning. A slight chance of snow showers in
the afternoon. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...Southeast winds 20 to 30 knots increasing to
gales to 35 knots by midnight. Freezing spray in the evening.
Snow showers. Waves building to 9 to 12 feet occasionally to
15 feet.
.FRIDAY...Southeast gales to 35 knots becoming south 15 to
25 knots in the afternoon. Snow showers in the morning, then a
chance of snow showers in the afternoon. Waves subsiding to 3 to
6 feet occasionally to 8 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots. Waves subsiding to
2 to 4 feet.
.SATURDAY...South winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots. A chance of rain
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...West gales to 45 knots becoming northwest storm force
winds to 60 knots. Snow showers. Freezing spray. Waves building
to 20 to 25 feet occasionally to 31 feet.
.MONDAY...North storm force winds to 60 knots becoming northwest
storm force winds to 55 knots. Heavy freezing spray. A chance of
snow showers. Waves subsiding to 9 to 12 feet occasionally to
15 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-250900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EST Wed Dec 24 2025

...GALE WARNING IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
AFTERNOON...

.LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. Waves 2 to
4 feet.
.TONIGHT...West winds 15 to 25 knots veering northwest by
midnight, then becoming north 20 to 30 knots late. Freezing spray
after midnight. Waves building to 4 to 7 feet occasionally to
9 feet.
.THURSDAY...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then veering east by mid afternoon.
Freezing spray in the morning. Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Southeast winds 15 to 25 knots increasing to
gales to 40 knots by midnight. A chance of snow showers in the
evening, then snow showers after midnight. Freezing spray after
midnight. Waves building to 6 to 9 feet occasionally to 11 feet.
.FRIDAY...Southeast gales to 35 knots diminishing to 20 to
30 knots in the afternoon. Snow showers in the morning, then a
chance of snow showers in the afternoon. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots. Waves subsiding
to 2 to 4 feet.
.SATURDAY...South winds 15 to 25 knots becoming southeast 20 to
30 knots in the afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY NIGHT...Southeast winds 20 to 30 knots veering south
after midnight. A chance of rain showers, possibly mixed with
snow in the evening, then rain and snow showers likely after
midnight. Waves subsiding to 2 to 4 feet.
.SUNDAY...South gales to 35 knots becoming northwest storm force
winds to 55 knots. Rain showers likely. Snow showers. Freezing
spray. Waves building to 15 to 20 feet occasionally to 25 feet.
.MONDAY...North storm force winds to 55 knots. Freezing spray. A
chance of snow showers. Waves subsiding to 8 to 11 feet
occasionally to 14 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-250300-
MAFOR 2422/
Superior West 11610 11820 13120 11130 12230. A chance of snow
showers Thursday afternoon. Waves 1 to 3 feet building to 2 to 4
feet tonight. Waves 2 to 4 feet building to 3 to 5 feet Thursday.

Superior North Central 11620 11730 13830 11130 11120 11230. A
chance of snow showers Thursday afternoon. Waves 2 to 4 feet
building to 3 to 6 feet tonight. Waves 3 to 6 feet Thursday.

Superior South Central 11620 11720 13830 11130 11120 11230. Waves
1 to 3 feet building to 4 to 7 feet tonight. Waves 4 to 7 feet
subsiding to 3 to 5 feet Thursday.

Superior East 11520 11620 11730 11840 11830 11130 11120 11220.
Waves 3 to 6 feet building to 4 to 7 feet tonight. Waves 4 to 7
feet subsiding to 2 to 4 feet Thursday.

$$

WFO MQT

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weather.gov/greatlakes