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FZUS63 KMQT 041501
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 AM EST Tue Nov 4 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...

30.0 inch ridging extends over the lake from surface high pressure
centered over the Southeast US. The ridge breaks down this evening
as 29.8 inch low pressure moves over WI and northern Lake Michigan
tonight into early Wednesday, deepening to 29.7 inches as it moves
into the Lower Peninsula. As the low departs into Ontario Wednesday
afternoon at 29.5 inches, high pressure builds to around 30.2 inches
over the Northern Plains. This high settles over the Great Lakes
basin Thursday before a 29.7 inch low pressure over the Plains
Thursday night deepens to 29.4 inches as it passes over the Upper
Great Lakes, departing to the east for the early weekend period.


LSZ162-042100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 AM EST Tue Nov 4 2025 /901 AM CST Tue Nov 4 2025/

.REST OF TODAY...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots by late morning, then backing south by mid
afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots backing northeast by
midnight, then becoming north 10 to 20 knots late. A chance of
rain showers. Waves calm to 2 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots becoming west 20 to
30 knots by late morning, then veering northwest by mid
afternoon. Waves building to 2 to 4 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon. A slight chance of rain showers in the
afternoon. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...South winds 15 to 25 knots veering west after
midnight. Rain showers likely in the evening, then a chance of
rain showers after midnight. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.FRIDAY...North winds 20 to 30 knots diminishing to 10 to
20 knots. A chance of rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots becoming north 15 to
25 knots. A chance of snow showers. Waves building to 2 to
4 feet.

$$

LSZ263-042100-
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-
1001 AM EST Tue Nov 4 2025

.REST OF TODAY...West winds 15 to 25 knots backing southwest by
late morning, then diminishing to 10 to 20 knots by mid
afternoon. Waves 3 to 5 feet occasionally to 7 feet subsiding to
1 to 3 feet.
.TONIGHT...Southeast winds 5 to 15 knots backing east by
midnight, then becoming north 10 to 20 knots late. A chance of
rain showers. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots. Waves building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots becoming south 15 to
25 knots in the afternoon. A slight chance of rain showers in the
afternoon. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...South winds 15 to 25 knots. Rain showers likely
in the evening, then a chance of rain showers after midnight.
Waves building to 2 to 4 feet.
.FRIDAY...North gales to 40 knots diminishing to 20 to 30 knots.
A chance of rain showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots becoming north 20 to
30 knots. Waves building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ264-042100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 AM EST Tue Nov 4 2025

.REST OF TODAY...West winds 15 to 25 knots becoming southwest
10 to 20 knots by mid afternoon. Waves 3 to 6 feet occasionally
to 8 feet subsiding to 2 to 4 feet.
.TONIGHT...Southwest winds 5 to 15 knots veering north late. A
chance of rain showers in the evening, then rain showers likely
after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots. A slight chance of rain showers in the morning. Waves
building to 4 to 7 feet occasionally to 9 feet.
.WEDNESDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...West winds 5 to 15 knots becoming south 15 to
25 knots in the afternoon. A slight chance of rain showers in the
afternoon. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.THURSDAY NIGHT...South winds 15 to 25 knots. Rain showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...North gales to 40 knots diminishing to 20 to 30 knots.
A chance of rain showers, possibly mixed with snow. Waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 1 to 3 feet.
.SATURDAY...Northwest winds 5 to 15 knots becoming north 20 to
30 knots. Waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet.

$$

LSZ265-042100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 AM EST Tue Nov 4 2025

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

$$

LSZ266-042100-
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-
1001 AM EST Tue Nov 4 2025

...GALE WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
WEDNESDAY EVENING...

.REST OF TODAY...West winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves 4 to 7 feet occasionally to
9 feet subsiding to 2 to 4 feet.
.TONIGHT...Southwest winds 10 to 20 knots backing east late. A
chance of rain showers in the evening, then rain showers likely
after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds 15 to 25 knots becoming northwest gales
to 40 knots. A chance of showers. Waves building to 8 to 11 feet
occasionally to 14 feet.
.WEDNESDAY NIGHT...Northwest gales to 35 knots diminishing to
10 to 20 knots after midnight. A chance of rain showers in the
evening. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...West winds 10 to 20 knots becoming south 15 to
25 knots in the afternoon. A chance of rain showers in the
afternoon. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.THURSDAY NIGHT...South winds 20 to 30 knots. Rain showers. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 6 feet occasionally to 8 feet.
.FRIDAY...North gales to 40 knots. Rain showers. A chance of snow
showers. A chance of rain showers. Waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...Northwest winds 10 to 20 knots becoming north 15 to
25 knots. A chance of snow showers, then snow showers likely.
Waves subsiding to calm to 2 feet, then building to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ267-042100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 AM EST Tue Nov 4 2025

...GALE WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
WEDNESDAY EVENING...

.REST OF TODAY...West winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Waves 5 to 8 feet occasionally to
10 feet subsiding to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...Southwest winds 10 to 20 knots backing southeast late.
A chance of rain showers in the evening, then rain showers after
midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds 15 to 25 knots becoming northwest gales
to 40 knots. Showers in the morning, then a chance of showers in
the afternoon. Waves building to 9 to 12 feet occasionally to
15 feet.
.WEDNESDAY NIGHT...Northwest gales to 35 knots diminishing to
15 to 25 knots after midnight. A chance of rain showers in the
evening. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...West winds 10 to 20 knots backing southwest in the
afternoon. A chance of rain showers in the afternoon. Waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.THURSDAY NIGHT...South winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Rain showers. Waves building to 3 to
6 feet occasionally to 8 feet.
.FRIDAY...North winds 20 to 30 knots. Rain showers. A chance of
rain showers. Waves building to 6 to 9 feet occasionally to
11 feet, then subsiding to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Northwest winds 10 to 20 knots veering north. A
chance of snow showers, then snow showers likely. Waves subsiding
to calm to 2 feet, then building to 2 to 4 feet.

$$

LSZ261-042100-
MAFOR 0416/
Superior West 11520 11510 12300 11210 11116 11820 11730. Waves 1
to 3 feet this afternoon. Waves 2 feet or less tonight. Waves 1
to 3 feet Wednesday morning.

Superior North Central 12630 12520 11510 11816 11820 11730. Waves
3 to 5 feet this afternoon. Waves 2 to 4 feet subsiding to 1 to 3
feet tonight. Waves 1 to 3 feet building to 2 to 4 feet Wednesday
morning.

Superior South Central 11630 11620 11510 11410 11406 11316 11126
11830. Waves 2 to 4 feet subsiding to 1 to 3 feet this afternoon.
Waves 2 feet or less tonight. Waves 1 to 3 feet Wednesday
morning.

Superior East 12630 11520 11510 11516 11416 11216 11836. Waves 4
to 7 feet this afternoon. Waves 3 to 5 feet subsiding to 1 to 3
feet tonight. Waves 1 to 3 feet Wednesday morning.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes