141
FZUS63 KMQT 101501
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EST Wed Dec 10 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...

29.5 to 29.6 troughing over Lake Superior this morning gradually
weakens to 29.7 inches through this evening as a 29.2 inch low
currently over southern Lower Michigan tracks to southern Quebec at
29.1 inches by tonight. This will allow 30.2 inch high pressure to
rebuild over the Northern Plains later today through Thursday while
extending weak ridging over Lake Superior. Ridging breaks down
slightly on Friday as a 29.8 inch trough drops out of northern
Ontario, but ridging quickly rebuilds this weekend as 30.6 inch high
pressure over the Northern Plains extends back into the Great Lakes.


LSZ162-102100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EST Wed Dec 10 2025 /900 AM CST Wed Dec 10 2025/

.REST OF TODAY...North winds 15 to 25 knots backing northwest by
mid afternoon. Waves 4 to 7 feet occasionally to 9 feet subsiding
to 2 to 4 feet.
.TONIGHT...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots by midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots backing west. Waves
calm to 2 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots. A slight chance of
snow showers after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots increasing to 20 to 30 knots
in the afternoon. Snow showers likely in the morning, then a
chance of snow showers in the afternoon. Waves building to 3 to
5 feet occasionally to 7 feet.
.FRIDAY NIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...Northwest winds 20 to 30 knots. Waves subsiding to
1 to 3 feet.
.SUNDAY...Northwest winds 15 to 25 knots backing southwest. A
chance of snow showers. Waves subsiding to calm to 2 feet, then
building to 3 to 5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-102100-
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-
1000 AM EST Wed Dec 10 2025

...GALE WARNING IN EFFECT UNTIL 11 AM EST THIS MORNING...

.REST OF TODAY...North winds 20 to 30 knots becoming northwest
15 to 25 knots by mid afternoon. Freezing spray. Waves 7 to
10 feet occasionally to 13 feet subsiding to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming north 10 to
20 knots late. Waves subsiding to 2 to 4 feet.
.THURSDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots backing west
after midnight. A slight chance of snow showers after midnight.
Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots increasing to 20 to 30 knots
in the afternoon. A chance of snow showers in the morning, then
snow showers likely in the afternoon. Waves building to 4 to
7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Northwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. Heavy freezing spray. A chance
of snow showers. Waves building to 6 to 9 feet occasionally to
11 feet.
.SATURDAY...Northwest winds 20 to 30 knots. Heavy freezing spray.
Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.SUNDAY...Northwest winds 15 to 25 knots becoming southwest 20 to
30 knots. A chance of snow showers. Waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-102100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 AM EST Wed Dec 10 2025

...GALE WARNING IN EFFECT UNTIL 11 AM EST THIS MORNING...

.REST OF TODAY...North gales to 35 knots diminishing to 20 to
30 knots by late morning, then backing northwest by mid
afternoon. Freezing spray. Waves 7 to 10 feet occasionally to
13 feet subsiding to 5 to 8 feet occasionally to 10 feet, then
building to 6 to 9 feet occasionally to 11 feet.
.TONIGHT...Northwest winds 20 to 30 knots becoming north 15 to
25 knots by midnight. Freezing spray. Waves subsiding to 3 to
6 feet occasionally to 8 feet.
.THURSDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots by late morning, then diminishing to 5 to 15 knots by
mid afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots. A slight chance
of snow showers after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots increasing to 20 to 30 knots
in the afternoon. A chance of snow showers in the morning, then
snow showers likely in the afternoon. Waves building to 3 to
6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Northwest gales to 35 knots. Heavy freezing
spray. Snow showers likely in the evening. A chance of snow
showers after midnight. Waves building to 8 to 11 feet
occasionally to 14 feet.
.SATURDAY...Northwest gales to 35 knots. Heavy freezing spray. A
chance of snow showers. Waves subsiding to 5 to 8 feet
occasionally to 10 feet, then building to 6 to 9 feet
occasionally to 11 feet.
.SUNDAY...Northwest winds 20 to 30 knots becoming southwest 15 to
25 knots. A chance of snow showers. Waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-102100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EST Wed Dec 10 2025

...GALE WARNING IN EFFECT UNTIL 11 AM EST THIS MORNING...

.REST OF TODAY...North gales to 35 knots backing northwest by mid
afternoon. Freezing spray. A slight chance of snow showers. Waves
6 to 10 feet occasionally to 13 feet.
.TONIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots by midnight. A slight chance of snow showers. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots. A slight chance of snow showers in the morning. Waves
subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots backing west
after midnight. A slight chance of snow showers. Waves subsiding
to calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots increasing to 20 to 30 knots
in the afternoon. A chance of snow showers in the morning, then
snow showers likely in the afternoon. Waves building to 2 to
4 feet.
.FRIDAY NIGHT...West gales to 35 knots becoming northwest gales
to 40 knots after midnight. Freezing spray. Snow showers likely.
Waves building to 8 to 11 feet occasionally to 14 feet.
.SATURDAY...Northwest gales to 40 knots. Freezing spray. Snow
showers likely. Waves subsiding to 6 to 9 feet occasionally to
11 feet.
.SUNDAY...Northwest winds 20 to 30 knots becoming southwest 15 to
25 knots. A chance of snow showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-102100-
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-
1000 AM EST Wed Dec 10 2025

...GALE WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING...

.REST OF TODAY...North gales to 40 knots backing northwest by mid
afternoon. Freezing spray. A chance of snow showers. Waves 7 to
11 feet occasionally to 13 feet.
.TONIGHT...Northwest gales to 40 knots becoming north gales to
35 knots by midnight, then diminishing to 20 to 30 knots late.
Freezing spray in the evening. A chance of snow showers. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet.
.THURSDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots. A chance of snow showers. Waves subsiding to 2 to
4 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots. A chance of
snow showers. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A chance of snow showers in the morning, then
snow showers likely in the afternoon. Waves building to 3 to
5 feet occasionally to 7 feet.
.FRIDAY NIGHT...West gales to 35 knots becoming northwest gales
to 40 knots after midnight. Freezing spray. Snow showers. Waves
building to 10 to 14 feet occasionally to 18 feet.
.SATURDAY...Northwest gales to 35 knots. Freezing spray. Snow
showers. Waves building to 11 to 15 feet occasionally to 19 feet,
then subsiding to 9 to 12 feet occasionally to 15 feet.
.SUNDAY...Northwest winds 20 to 30 knots becoming southwest 15 to
25 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-102100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EST Wed Dec 10 2025

.REST OF TODAY...North winds to 30 knots with a few gale force
gusts to 35 knots possible becoming northwest to 30 knots with a
few gale force gusts to 40 knots possible by mid afternoon.
Freezing spray. A chance of snow showers. Waves 5 to 8 feet
occasionally to 10 feet building to 7 to 10 feet occasionally to
13 feet.
.TONIGHT...North winds to 30 knots with a few gale force gusts to
40 knots possible diminishing to 20 to 30 knots late. Freezing
spray in the evening. A chance of snow showers. Waves building to
9 to 12 feet occasionally to 15 feet, then subsiding to 5 to
8 feet occasionally to 10 feet.
.THURSDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then backing northwest by mid
afternoon. A chance of snow showers. Waves subsiding to 2 to
4 feet.
.THURSDAY NIGHT...North winds 10 to 20 knots backing northwest
after midnight. A slight chance of snow showers. Waves subsiding
to calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots backing southwest in the
afternoon. A chance of snow showers in the morning, then snow
showers likely in the afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...West winds 20 to 30 knots becoming northwest
gales to 35 knots after midnight. Snow showers. Freezing spray
after midnight. Waves building to 10 to 14 feet occasionally to
18 feet.
.SATURDAY...Northwest gales to 35 knots becoming north 20 to
30 knots. Freezing spray. Snow showers. Waves subsiding to 7 to
10 feet occasionally to 13 feet.
.SUNDAY...North winds 15 to 25 knots backing southwest. Freezing
spray. A chance of snow showers. Waves subsiding to 2 to 4 feet,
then building to 3 to 5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-102100-
MAFOR 1016/
Superior West 11840 11720 11730 13720 11710 11700. Waves 4 to 7
feet subsiding to 3 to 5 feet this afternoon. Waves 2 to 4 feet
subsiding to 1 to 3 feet tonight. Waves 2 feet or less Thursday
morning.

Superior North Central 11840 12740 12840 13830. Waves 6 to 10
feet subsiding to 5 to 8 feet this afternoon. Waves 5 to 9 feet
subsiding to 4 to 7 feet tonight. Waves 3 to 6 feet Thursday
morning.

Superior South Central...GALE WARNING IN EFFECT...11841 13751
12740 12730. A chance of snow showers late this morning and this
evening. Waves 7 to 10 feet this afternoon. Waves 7 to 11 feet
subsiding to 5 to 8 feet tonight. Waves 4 to 7 feet Thursday
morning.

Superior East...GALE WARNING IN EFFECT...11840 11740 11751 11840
11841 13830. A chance of snow showers this afternoon and tonight.
Waves 5 to 9 feet this afternoon. Waves 9 to 12 feet subsiding to
5 to 8 feet tonight. Waves 4 to 7 feet Thursday morning.

$$

WFO MQT

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

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