600
FZUS63 KMQT 072102
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EST Fri Nov 7 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 29.3 inch low over eastern Ontario will push into Quebec overnight
and into Saturday morning. Ridging will build over the lake this
weekend as the low exits into Quebec and 30.6 inch high pressure
develops over the Great Plains, with the ridge over the lake
strengthening from 29.8 inches on Saturday to 30.2 inches through
Sunday night. The ridge quickly breaks down early next week as a
29.4 inch trough sweeps across the lake on Tuesday through Wednesday
morning. By Wednesday night the lake will be between 30.1 inch
ridging over the plains and a deep 28.8 inch low over the Hudson Bay.


LSZ162-080900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EST Fri Nov 7 2025 /301 PM CST Fri Nov 7 2025/

.LATE THIS AFTERNOON...North winds 15 to 25 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TONIGHT...North winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.SATURDAY...North winds 10 to 20 knots. A slight chance of snow
showers in the afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots becoming northwest
20 to 30 knots by midnight. A slight chance of snow showers.
Waves building to 2 to 4 feet.
.SUNDAY...Northwest winds 20 to 30 knots veering north in the
afternoon. A chance of snow showers. Waves building to 3 to
5 feet occasionally to 7 feet.
.SUNDAY NIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 2 to 4 feet.
.MONDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. Waves building 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,
then subsiding to 1 to 3 feet.
.WEDNESDAY...West gales to 35 knots veering northwest. Waves
building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ263-080900-
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 PM EST Fri Nov 7 2025

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Waves 5 to
9 feet occasionally to 11 feet.
.TONIGHT...North winds 15 to 25 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots veering north by late
morning, then increasing to 10 to 20 knots by mid afternoon. A
slight chance of snow showers in the afternoon. Waves calm to
2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots becoming northwest
15 to 25 knots by midnight. A chance of snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northwest winds 20 to 30 knots veering north in the
afternoon. A chance of snow 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...North gales to 35 knots diminishing to 20 to
30 knots after midnight. A chance of snow showers. Waves building
to 4 to 7 feet occasionally to 9 feet.
.MONDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. Waves subsiding to 2 to 4 feet.
.MONDAY NIGHT...West winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...Southwest gales to 35 knots veering west. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...West gales to 45 knots becoming northwest gales to
40 knots. Waves building to 6 to 10 feet occasionally to 13 feet.

$$

LSZ264-080900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EST Fri Nov 7 2025

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Waves 6 to
10 feet occasionally to 13 feet.
.TONIGHT...North winds 20 to 30 knots diminishing to 10 to
20 knots by midnight, then becoming northwest 5 to 15 knots late.
Waves subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 5 to 15 knots. A slight chance of
snow showers in the afternoon. Waves subsiding to calm to 2 feet,
then building to 1 to 3 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots becoming northwest
15 to 25 knots by midnight. A chance of snow showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...North winds 20 to 30 knots. 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.
.SUNDAY NIGHT...North winds 20 to 30 knots. A chance of snow
showers. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.
.MONDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. A chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots becoming west
15 to 25 knots after midnight. Waves subsiding to 2 to 4 feet,
then building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...Southwest winds 20 to 30 knots becoming west gales to
35 knots. A chance of snow showers. 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.
.WEDNESDAY...Northwest gales to 40 knots. A chance of snow
showers. Waves building to 8 to 11 feet occasionally to 14 feet.

$$

LSZ265-080900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EST Fri Nov 7 2025

.LATE THIS AFTERNOON...North winds to 30 knots with a few gale
force gusts to 35 knots possible. A slight chance of rain and
snow showers. Waves 9 to 12 feet occasionally to 15 feet
subsiding to 8 to 11 feet occasionally to 14 feet.
.TONIGHT...North winds to 30 knots with a few gale force gusts to
35 knots possible diminishing to 15 to 25 knots by midnight, then
becoming northwest 10 to 20 knots late. A slight chance of snow
showers in the evening. Waves subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 10 to 20 knots. A chance of snow
showers. Waves subsiding to calm to 2 feet, then building to 1 to
3 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots becoming northwest
20 to 30 knots late. Snow showers likely. Waves building to 2 to
4 feet.
.SUNDAY...Northwest winds 20 to 30 knots becoming north gales to
35 knots in the afternoon. Snow showers. Waves building to 4 to
7 feet occasionally to 9 feet.
.SUNDAY NIGHT...North winds 20 to 30 knots. Snow showers. Waves
4 to 7 feet occasionally to 9 feet.
.MONDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots in the afternoon. Snow showers likely. Waves subsiding
to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...Northwest winds 15 to 25 knots backing west after
midnight. A chance of snow showers. Waves subsiding to calm to
2 feet.
.TUESDAY...Southwest winds 20 to 30 knots becoming west gales to
35 knots. A chance of snow showers. A chance of rain showers.
Waves building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...West gales to 45 knots veering northwest. A chance
of rain showers. A chance of snow showers. Waves building to 5 to
9 feet occasionally to 11 feet.

$$

LSZ266-080900-
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 PM EST Fri Nov 7 2025

...GALE WARNING IN EFFECT UNTIL 9 PM EST THIS EVENING...

.LATE THIS AFTERNOON...North gales to 40 knots. Waves 9 to
12 feet occasionally to 15 feet.
.TONIGHT...North gales to 35 knots diminishing to 10 to 20 knots.
A slight chance of snow showers after midnight. Waves subsiding
to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots backing northwest
late. Snow showers. Waves building to 3 to 5 feet occasionally to
7 feet.
.SUNDAY...North winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. Snow showers. Waves building to 4 to 7 feet
occasionally to 9 feet.
.SUNDAY NIGHT...North winds 20 to 30 knots. Snow showers in the
evening, then a chance of snow showers after midnight. Waves 4 to
7 feet occasionally to 9 feet.
.MONDAY...North winds 20 to 30 knots backing northwest in the
afternoon. Snow showers. Waves building to 4 to 8 feet
occasionally to 10 feet.
.MONDAY NIGHT...Northwest winds 15 to 25 knots backing west after
midnight. Snow showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...Southwest winds 20 to 30 knots becoming west gales to
35 knots. Snow showers likely, possibly mixed with rain showers,
then rain showers likely. Waves building to 5 to 8 feet
occasionally to 10 feet.
.WEDNESDAY...Northwest gales to 45 knots. Rain showers. Snow
showers likely. Waves building to 10 to 14 feet occasionally to
18 feet.

$$

LSZ267-080900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EST Fri Nov 7 2025

.LATE THIS AFTERNOON...North winds to 30 knots with a few gale
force gusts to 35 knots possible. A slight chance of rain and
snow showers. Waves 6 to 9 feet occasionally to 11 feet.
.TONIGHT...North winds to 30 knots with a few gale force gusts to
35 knots possible diminishing to 15 to 25 knots. Waves building
to 7 to 10 feet occasionally to 13 feet, then subsiding to 2 to
4 feet.
.SATURDAY...North winds 10 to 20 knots backing northwest. A
chance of snow showers. Waves subsiding to calm to 2 feet, then
building to 1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots veering north by
midnight. Snow showers. Waves building to 2 to 4 feet.
.SUNDAY...North winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. Snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY NIGHT...North winds 15 to 25 knots. Snow showers in the
evening, then a chance of snow showers after midnight. Waves 3 to
6 feet occasionally to 8 feet.
.MONDAY...North winds 15 to 25 knots backing northwest in the
afternoon. Snow showers likely. Waves 3 to 6 feet occasionally to
8 feet.
.MONDAY NIGHT...Northwest winds 15 to 25 knots backing west after
midnight. Snow showers likely. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west 20 to
30 knots. Snow showers likely, then rain showers. Waves building
to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...Northwest gales to 35 knots. Rain showers. Snow
showers likely. Waves building to 10 to 14 feet occasionally to
18 feet.

$$

LSZ261-080300-
MAFOR 0722/
Superior West 11830 11820 12810 11800 13810. Waves 3 to 6 feet
subsiding to 1 to 3 feet tonight. Waves 1 to 2 feet Saturday.

Superior North Central 11850 11840 11820 13710 12720. Waves 6 to
9 feet subsiding to 2 to 4 feet tonight. Waves 2 to 3 feet
Saturday.

Superior South Central...GALE WARNING IN EFFECT...11850 11840
11830 11720 12710 12720. Waves 8 to 12 feet subsiding to 3 to 6
feet tonight. Waves 2 to 4 feet Saturday.

Superior East...GALE WARNING IN EFFECT...11850 11840 11830 11820
12810 11710 11720. A chance of snow showers Saturday. Waves 5 to
9 feet subsiding to 3 to 5 feet tonight. Waves 2 to 4 feet
subsiding to 1 to 3 feet Saturday.

$$

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