692
FZUS63 KMQT 122108 CCA
GLFLS

Open Lake Forecast for Lake Superior...CORRECTED
National Weather Service Marquette MI
408 PM 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...

Ridging progressively builds over Lake Superior tonight into
Thursday, eventually peaking at 30.0 to 30.1 inches Thursday night
ahead of a 29.2 inch low lifting out of Alberta. This low looks to
bring troughing of around 29.4 inches across Lake Superior on
Saturday. By the end of the weekend, Lake Superior looks to be
between low pressure of near 28.7 inches over the Canadian Maritimes
and high pressure of near 30.1 inches over the Canadian Prairies.
Ridging then builds in from the Canadian Prairies and Plains over
Lake Superior to 30.1 to 30.2 inches by Monday night.


LSZ162-130900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
408 PM EST Wed Nov 12 2025 /308 PM CST Wed Nov 12 2025/

.LATE THIS AFTERNOON...Northwest winds 20 to 30 knots. Waves 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 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots backing east by
midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves building to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots increasing to 20 to
30 knots in the afternoon. A chance of rain showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY 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.
.SUNDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Waves subsiding to calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots becoming northeast 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ263-130900-
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-
408 PM EST Wed Nov 12 2025

...GALE WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING...

.LATE THIS AFTERNOON...Northwest gales to 35 knots. Waves 6 to
10 feet occasionally to 13 feet.
.TONIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots by midnight, then backing west late. Waves subsiding to
3 to 6 feet occasionally to 8 feet.
.THURSDAY...West winds 20 to 30 knots. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots becoming northeast
5 to 15 knots by midnight, then veering east late. 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 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves 2 to 4 feet.
.SATURDAY...West winds 15 to 25 knots increasing to gales to
35 knots in the afternoon. A chance of rain showers. Waves
building to 5 to 8 feet occasionally to 10 feet.
.SATURDAY NIGHT...Northwest gales to 35 knots. Waves building to
7 to 10 feet occasionally to 13 feet.
.SUNDAY...Northwest gales to 35 knots. Waves subsiding to 2 to
4 feet.
.MONDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ264-130900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
408 PM EST Wed Nov 12 2025

...GALE WARNING IN EFFECT UNTIL 1 AM EST THURSDAY...

.LATE THIS AFTERNOON...Northwest gales to 35 knots. A slight
chance of rain showers. Waves 8 to 11 feet occasionally to
14 feet.
.TONIGHT...Northwest gales to 35 knots becoming west 20 to
30 knots late. Waves subsiding to 5 to 8 feet occasionally to
10 feet.
.THURSDAY...West winds 20 to 30 knots. Waves subsiding to 3 to
6 feet occasionally to 8 feet.
.THURSDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots by midnight, then veering east late. 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 15 to 25 knots increasing to gales to
35 knots in the afternoon. A chance of rain showers. Waves
building to 5 to 8 feet occasionally to 10 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. Waves building to
10 to 14 feet occasionally to 18 feet.
.SUNDAY...Northwest gales to 40 knots. Waves subsiding to 4 to
7 feet occasionally to 9 feet.
.MONDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.

$$

LSZ265-130900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
408 PM EST Wed Nov 12 2025

...GALE WARNING IN EFFECT THROUGH THURSDAY MORNING...

.LATE THIS AFTERNOON...Northwest gales to 40 knots. A slight
chance of rain showers. Waves 7 to 10 feet occasionally to
13 feet.
.TONIGHT...Northwest gales to 45 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 2 to 4 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots becoming north
5 to 15 knots by midnight, then veering east late. 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 1 to 3 feet.
.FRIDAY NIGHT...South winds 20 to 30 knots. Waves building to
2 to 4 feet.
.SATURDAY...Southwest winds 15 to 25 knots becoming west gales to
35 knots in the afternoon. A chance of showers in the morning,
then showers likely in the afternoon. Waves building to 4 to
7 feet occasionally to 9 feet.
.SATURDAY NIGHT...Northwest gales to 45 knots. A chance of rain
showers in the evening. A chance of snow showers. Waves building
to 8 to 11 feet occasionally to 14 feet.
.SUNDAY...Northwest gales to 40 knots. A chance of snow showers.
Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ266-130900-
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-
408 PM EST Wed Nov 12 2025

...GALE WARNING IN EFFECT THROUGH THURSDAY MORNING...

.LATE THIS AFTERNOON...Northwest gales to 40 knots. A chance of
rain showers. Waves 10 to 14 feet occasionally to 18 feet.
.TONIGHT...Northwest gales to 40 knots. A chance of rain showers.
Waves subsiding to 9 to 12 feet occasionally to 15 feet.
.THURSDAY...West winds 20 to 30 knots veering northwest by mid
afternoon. A slight chance of rain showers in the morning. Waves
subsiding to 5 to 8 feet occasionally to 10 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots becoming north
5 to 15 knots by 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 20 to 30 knots. A chance of rain
showers after midnight. Waves building to 4 to 8 feet
occasionally to 10 feet.
.SATURDAY...South winds 20 to 30 knots becoming west gales to
35 knots in the afternoon. A chance of showers in the morning,
then showers in the afternoon. Waves building to 7 to 10 feet
occasionally to 13 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. Rain showers,
possibly mixed with snow in the evening, then snow showers after
midnight. Waves building to 12 to 17 feet occasionally to
21 feet.
.SUNDAY...Northwest gales to 40 knots. Snow showers likely, then
a chance of snow showers. Waves subsiding to 6 to 9 feet
occasionally to 11 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. A chance of rain showers, possibly mixed with snow.
Waves subsiding to 1 to 3 feet.

$$

LSZ267-130900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
408 PM EST Wed Nov 12 2025

...GALE WARNING IN EFFECT UNTIL 1 AM EST THURSDAY...

.LATE THIS AFTERNOON...Northwest gales to 40 knots. A chance of
rain showers. Waves 10 to 14 feet occasionally to 18 feet.
.TONIGHT...Northwest gales to 40 knots. Rain showers likely in
the evening, then a slight chance of rain showers after midnight.
Waves subsiding to 10 to 14 feet occasionally to 18 feet.
.THURSDAY...Northwest gales to 35 knots. A chance of rain
showers. Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.THURSDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
10 to 20 knots by midnight, then veering north late. A slight
chance of rain showers in the evening. Waves subsiding to 1 to
3 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. A chance of rain showers after
midnight. Waves building to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...South winds 20 to 30 knots veering west in the
afternoon. Showers. Waves building to 7 to 10 feet occasionally
to 13 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. Rain showers in
the evening, then snow showers after midnight. Waves building to
12 to 17 feet occasionally to 21 feet.
.SUNDAY...Northwest gales to 40 knots. Snow showers. Waves
subsiding to 6 to 9 feet occasionally to 11 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. A chance of rain and snow showers. Waves subsiding to
1 to 3 feet.

$$

LSZ261-130300-
MAFOR 1222/
Superior West...GALE WARNING IN EFFECT...12740 19750 11730 14630
11630. Waves 4 to 7 feet subsiding to 2 to 4 feet tonight. Waves 3 to
5 feet subsiding to 2 to 4 feet Thursday.

Superior North Central...GALE WARNING IN EFFECT...13750 11740
12640 11650 11640. Waves 7 to 11 feet subsiding to 5 to 9 feet
tonight. Waves 5 to 8 feet Thursday.

Superior South Central...GALE WARNING IN EFFECT...14750 13650
11640. Waves 8 to 12 feet subsiding to 7 to 10 feet tonight.
Waves 5 to 9 feet subsiding to 4 to 7 feet Thursday.

Superior East...GALE WARNING IN EFFECT...11756 13750 14740. Waves
10 to 14 feet tonight. Waves 8 to 12 feet subsiding to 7 to 10
feet Thursday.

$$

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