261
FZUS63 KMQT 120901
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 AM EST Wed Nov 12 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...

A 29.5 inch trough over Lake Superior early this morning departs
into eastern Ontario throughout the morning as a 29.4 inch low moves
over Hudson Bay. By tonight, the lake will be between 30.1 inch
ridging over the Midwest and a deep 28.4 inch low over Labrador.
Ridging builds to 30.0 inches over the lake Thursday night ahead of
a 29.4 inch trough moving out of the northern Rockies. This trough
looks to move across Lake Superior at around 29.4 inches on
Saturday. By the end of the weekend, Lake Superior will be between
low pressure of near 29.0 inches over the Canadian Maritimes and
high pressure of near 30.1 inches over the Great Plains.


LSZ162-122100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 AM EST Wed Nov 12 2025 /301 AM CST Wed Nov 12 2025/

.EARLY THIS MORNING...West winds 20 to 30 knots. Waves 4 to
7 feet occasionally to 9 feet.
.TODAY...West winds 20 to 30 knots increasing to 30 knots with a
few gale force gusts to 35 knots possible by late morning, then
diminishing to 20 to 30 knots by mid afternoon. Waves subsiding
to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 20 to 30 knots becoming west 15 to
25 knots by midnight. Waves subsiding to 3 to 5 feet occasionally
to 7 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots backing east after
midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots. Waves building to
1 to 3 feet.
.SATURDAY...West winds 15 to 25 knots becoming northwest 20 to
30 knots. A chance of rain showers. Waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Waves subsiding to calm to 2 feet.

$$

LSZ263-122100-
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-
401 AM EST Wed Nov 12 2025

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.EARLY THIS MORNING...Northwest gales to 35 knots. Waves 6 to
9 feet occasionally to 11 feet building to 7 to 10 feet
occasionally to 13 feet.
.TODAY...Northwest gales to 35 knots. Waves subsiding to 6 to
9 feet occasionally to 11 feet, then building to 7 to 10 feet
occasionally to 13 feet.
.TONIGHT...Northwest winds 20 to 30 knots becoming west 15 to
25 knots late. Waves subsiding to 3 to 6 feet occasionally to
8 feet, then building to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...West winds 20 to 30 knots. Waves building to 5 to
8 feet occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots becoming east
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots. Waves building to 2 to
4 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots. Waves 2 to 4 feet.
.SATURDAY...West winds 20 to 30 knots veering northwest. A chance
of rain showers. Waves building to 5 to 8 feet occasionally to
10 feet.
.SUNDAY...Northwest winds 20 to 30 knots. Waves building to 6 to
9 feet occasionally to 11 feet, then subsiding to 2 to 4 feet.

$$

LSZ264-122100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 AM EST Wed Nov 12 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.EARLY THIS MORNING...Northwest gales to 35 knots. Isolated rain
showers. Waves 5 to 9 feet occasionally to 11 feet.
.TODAY...Northwest gales to 35 knots. Isolated rain showers in
the morning. Waves building to 6 to 10 feet occasionally to
13 feet.
.TONIGHT...Northwest gales to 35 knots becoming west 20 to
30 knots late. Waves subsiding to 4 to 7 feet occasionally to
9 feet.
.THURSDAY...West winds 20 to 30 knots increasing to gales to
35 knots by late morning, then diminishing to 20 to 30 knots by
mid afternoon. Waves building to 6 to 9 feet occasionally to
11 feet, then subsiding to 4 to 7 feet occasionally to 9 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots becoming north
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...Southeast 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.
.FRIDAY NIGHT...South winds 15 to 25 knots. Waves building to
4 to 7 feet occasionally to 9 feet.
.SATURDAY...West winds 20 to 30 knots becoming northwest gales to
35 knots. A chance of rain showers. Waves subsiding to 3 to
6 feet occasionally to 8 feet, then building to 8 to 11 feet
occasionally to 14 feet.
.SUNDAY...Northwest gales to 35 knots. Waves subsiding to 4 to
7 feet occasionally to 9 feet.

$$

LSZ265-122100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 AM EST Wed Nov 12 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.EARLY THIS MORNING...Northwest gales to 40 knots. Scattered rain
showers. Waves 5 to 8 feet occasionally to 10 feet.
.TODAY...Northwest gales to 40 knots. Scattered rain showers.
Waves building to 6 to 9 feet occasionally to 11 feet.
.TONIGHT...Northwest gales to 40 knots becoming west gales to
35 knots late. Waves subsiding to 4 to 7 feet occasionally to
9 feet.
.THURSDAY...West gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. Waves subsiding to 3 to 5 feet occasionally to
7 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots becoming north
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.SATURDAY...West winds 20 to 30 knots becoming northwest gales to
40 knots. A chance of rain showers, then rain showers likely,
possibly mixed with snow showers. Waves subsiding to 1 to 3 feet,
then building to 6 to 9 feet occasionally to 11 feet.
.SUNDAY...Northwest gales to 45 knots. A chance of snow showers.
Waves subsiding to 3 to 6 feet occasionally to 8 feet.

$$

LSZ266-122100-
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-
401 AM EST Wed Nov 12 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.EARLY THIS MORNING...Northwest gales to 40 knots. Scattered rain
showers. Waves 7 to 10 feet occasionally to 13 feet.
.TODAY...Northwest gales to 40 knots. Scattered rain showers.
Waves building to 9 to 12 feet occasionally to 15 feet.
.TONIGHT...Northwest gales to 40 knots. Scattered rain showers in
the evening. Waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 7 to 10 feet occasionally to 13 feet.
.THURSDAY...Northwest winds 20 to 30 knots backing west by late
morning, then veering northwest by mid afternoon. Scattered rain
showers. Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots becoming north
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves subsiding to calm to 2 feet,
then building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Waves building to 4 to 8 feet
occasionally to 10 feet.
.SATURDAY...South winds 20 to 30 knots becoming northwest gales
to 35 knots. Rain showers likely. Snow showers. Waves subsiding
to 3 to 6 feet occasionally to 8 feet, then building to 10 to
14 feet occasionally to 18 feet.
.SUNDAY...Northwest gales to 40 knots. A chance of snow showers.
Waves building to 12 to 17 feet occasionally to 21 feet, then
subsiding to 7 to 10 feet occasionally to 13 feet.

$$

LSZ267-122100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 AM EST Wed Nov 12 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.EARLY THIS MORNING...Northwest gales to 35 knots. Scattered rain
showers. Waves 7 to 10 feet occasionally to 13 feet.
.TODAY...Northwest gales to 40 knots. Numerous rain showers in
the morning, then scattered rain showers in the afternoon. Waves
building to 9 to 12 feet occasionally to 15 feet.
.TONIGHT...Northwest gales to 40 knots. Scattered rain showers.
Waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 8 to 11 feet occasionally to 14 feet.
.THURSDAY...Northwest winds 20 to 30 knots becoming west gales to
35 knots by late morning, then veering northwest by mid
afternoon. Scattered rain showers. Waves subsiding to 7 to
10 feet occasionally to 13 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Isolated rain showers in the
evening. Waves subsiding to 2 to 4 feet.
.FRIDAY...East winds 10 to 20 knots veering southeast in the
afternoon. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots becoming south
20 to 30 knots after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...South winds 20 to 30 knots becoming northwest gales
to 35 knots. Rain showers. Snow showers. Waves building to 10 to
14 feet occasionally to 18 feet.
.SUNDAY...Northwest gales to 40 knots. Snow showers. Waves
building to 12 to 17 feet occasionally to 21 feet, then subsiding
to 7 to 10 feet occasionally to 13 feet.

$$

LSZ261-121500-
MAFOR 1210/
Superior West...GALE WARNING IN EFFECT...11740 12750 13740 11730
11630. Waves 5 to 8 feet today. Waves 3 to 6 feet tonight.

Superior North Central...GALE WARNING IN EFFECT...15750 11750
11740. Waves 5 to 9 feet building to 7 to 10 feet today. Waves 6
to 10 feet subsiding to 4 to 7 feet tonight.

Superior South Central...GALE WARNING IN EFFECT...12750 19756
15750. Waves 6 to 10 feet today. Waves 7 to 11 feet subsiding to
6 to 9 feet tonight.

Superior East...GALE WARNING IN EFFECT...12746 14750 19756 11750
19756 11740. Waves 7 to 11 feet building to 9 to 12 feet today.
Waves 9 to 12 feet tonight.

$$

WFO MQT

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