068
FZUS63 KMQT 030900
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM EST Wed Dec 3 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 29.7 inch trough extending south from a 29.4 inch low over Hudson
Bay will pushpast Lake Superior late this morning. In its wake, a
30.5 inch high builds over the Dakotas this evening. As this high
shifts into the Lower Midwest Thursday, it will pass a 30.2 inch
ridge over the lake. Meanwhile, a 29.7 inch low will move over Lake
Winnipeg before passing north of the lake overnight into Friday.
Friday night, another 29.7 inch trough will pass over the lake. As
the trough (and its parent low near the eastern shores of Hudson
Bay) shifts east, a 30.4 inch high straddles the North Dakota/Canada
by Saturday evening. This high will move over the Upper Mississippi
River Valley Sunday evening at 30.5 inches, shifting towards the
Lower Great Lakes for Monday ahead of the next Clipper Low.


LSZ162-032100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 AM EST Wed Dec 3 2025 /300 AM CST Wed Dec 3 2025/

.EARLY THIS MORNING...North winds 20 to 30 knots. Waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet.
.TODAY...North winds 20 to 30 knots backing northwest. Freezing
spray in the afternoon. Waves building to 5 to 8 feet
occasionally to 10 feet.
.TONIGHT...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. Heavy freezing spray in the evening. Waves
subsiding to 2 to 4 feet.
.THURSDAY...West winds 10 to 20 knots becoming southwest 20 to
30 knots by late morning, then increasing to 30 knots with a few
gale force gusts to 35 knots possible by mid afternoon. Freezing
spray in the afternoon. A slight chance of snow showers in the
afternoon. Waves subsiding to 1 to 3 feet, then building to 5 to
8 feet occasionally to 10 feet.
.THURSDAY NIGHT...Southwest gales to 35 knots becoming west 20 to
30 knots after midnight. Freezing spray. Snow showers in the
evening. A chance of snow showers after midnight. Waves building
to 7 to 10 feet occasionally to 13 feet, then subsiding to 3 to
6 feet occasionally to 8 feet.
.FRIDAY...West winds 10 to 20 knots. A chance of snow showers.
Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Waves building to 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-032100-
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-
400 AM EST Wed Dec 3 2025

...GALE WARNING IN EFFECT FROM 4 PM EST THIS AFTERNOON THROUGH
LATE TONIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THIS EVENING
THROUGH THURSDAY MORNING...

.EARLY THIS MORNING...North winds 20 to 30 knots. A chance of
snow showers. Waves 3 to 6 feet occasionally to 8 feet.
.TODAY...North winds 20 to 30 knots backing northwest by late
morning, then increasing to gales to 35 knots by mid afternoon.
Freezing spray. A slight chance of snow showers. Waves building
to 4 to 8 feet occasionally to 10 feet.
.TONIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots late. Freezing spray. A chance of snow showers. Waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...West winds 15 to 25 knots becoming southwest 20 to
30 knots by late morning, then increasing to gales to 35 knots by
mid afternoon. Freezing spray. A slight chance of snow showers.
Waves subsiding to 3 to 5 feet occasionally to 7 feet, then
building to 6 to 9 feet occasionally to 11 feet.
.THURSDAY NIGHT...Southwest gales to 35 knots veering west after
midnight. Freezing spray in the evening. Snow showers. Waves
building to 9 to 12 feet occasionally to 15 feet, then subsiding
to 7 to 10 feet occasionally to 13 feet.
.FRIDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots
in the afternoon. A chance of snow showers. Waves subsiding to
2 to 4 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-032100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 AM EST Wed Dec 3 2025

...GALE WARNING IN EFFECT THROUGH THURSDAY MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THIS EVENING
THROUGH THURSDAY MORNING...

.EARLY THIS MORNING...North winds 20 to 30 knots. A chance of
snow showers. Waves 3 to 6 feet occasionally to 8 feet building
to 4 to 7 feet occasionally to 9 feet.
.TODAY...North gales to 35 knots becoming northwest 20 to
30 knots by late morning, then increasing to gales to 35 knots by
mid afternoon. Freezing spray. A chance of snow showers. Waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet.
.TONIGHT...Northwest gales to 35 knots. Heavy freezing spray. A
chance of snow showers. Waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 7 to 10 feet
occasionally to 13 feet.
.THURSDAY...Northwest winds 20 to 30 knots becoming west 15 to
25 knots by late morning, then becoming southwest 20 to 30 knots
by mid afternoon. Freezing spray in the morning. A chance of snow
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet,
then building to 5 to 8 feet occasionally to 10 feet.
.THURSDAY NIGHT...Southwest gales to 35 knots veering west after
midnight. Freezing spray in the evening. Snow showers. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 8 to 11 feet occasionally to 14 feet.
.FRIDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots
in the afternoon. A chance of snow showers. Waves subsiding to
2 to 4 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots becoming northwest
20 to 30 knots after midnight. A chance of snow showers. Freezing
spray after midnight. Waves building to 3 to 6 feet occasionally
to 8 feet.
.SATURDAY...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots. Freezing spray. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet.
.SUNDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-032100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 AM EST Wed Dec 3 2025

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

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. Snow
showers likely. Waves 3 to 5 feet occasionally to 7 feet.
.TODAY...North gales to 35 knots backing northwest. Freezing
spray. Snow showers likely in the morning. A chance of snow
showers in the afternoon. Waves building to 6 to 10 feet
occasionally to 13 feet.
.TONIGHT...Northwest gales to 40 knots. Freezing spray. A chance
of snow showers. Waves building to 6 to 10 feet occasionally to
13 feet.
.THURSDAY...Northwest gales to 35 knots becoming west 20 to
30 knots by late morning, then backing southwest by mid
afternoon. Freezing spray in the morning. A chance of snow
showers. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...Southwest gales to 35 knots. Freezing spray in
the evening. Snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...West winds 20 to 30 knots diminishing to 15 to 25 knots
in the afternoon. A chance of snow showers. Waves subsiding to
1 to 3 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight. Snow showers likely in the
evening, then a chance of snow showers after midnight. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to calm to 2 feet.
.SUNDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-032100-
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-
400 AM EST Wed Dec 3 2025

...GALE WARNING IN EFFECT THROUGH THURSDAY MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THIS EVENING
THROUGH THURSDAY MORNING...

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

Note, wave height forecasts are for ice free areas.

$$

LSZ267-032100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 AM EST Wed Dec 3 2025

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

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

Note, wave height forecasts are for ice free areas.

$$

LSZ261-031500-
MAFOR 0310/
Superior West...GALE WARNING IN EFFECT...HEAVY FREEZING SPRAY
WARNING IN EFFECT...12840 12740 11750 11752 11742 11740. Waves 3
to 6 feet building to 5 to 8 feet today. Waves 5 to 9 feet
subsiding to 4 to 7 feet tonight.

Superior North Central...GALE WARNING IN EFFECT...HEAVY FREEZING
SPRAY WARNING IN EFFECT...12850 11750 11740 11750 13752. A chance
of snow showers early this morning. A chance of snow showers this
afternoon. A chance of snow showers tonight. Waves 4 to 6 feet
building to 6 to 10 feet, then subsiding to 5 to 8 feet today.
Waves 7 to 11 feet tonight.

Superior South Central...GALE WARNING IN EFFECT...HEAVY FREEZING
SPRAY WARNING IN EFFECT...11747 11857 11750 11740 11750 12757
11750. Waves 3 to 6 feet building to 7 to 11 feet today. Waves 8
to 12 feet building to 10 to 13 feet tonight.

Superior East...GALE WARNING IN EFFECT...HEAVY FREEZING SPRAY
WARNING IN EFFECT...11647 11757 11857 14757 11757. Waves 5 to 8
feet building to 7 to 11 feet today. Waves 8 to 11 feet building
to 10 to 14 feet tonight.

$$

WFO MQT

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

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weather.gov/greatlakes