064
FZUS63 KMQT 020900
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM EST Tue Dec 2 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 weak 29.9 inch trough is over Lake Superior this morning. This
trough will be absorbed by a 29.7 inch trough associated with a 29.5
inch low over Hudson Bay today. The trough will exit the lake to the
east by Wednesday morning. In its wake, a 30.5 inch high builds over
the Dakotas Wednesday 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 at 29.6 inches.
Friday night, another 29.7 inch trough will pass over the lake. Over
the weekend, Lake Superior will be between a 30.3 inch high over
Saskatchewan and a low of 29.6 inches over Quebec, with the high
approaching Lake Superior late in the weekend to early next week.


LSZ162-022100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 AM EST Tue Dec 2 2025 /300 AM CST Tue Dec 2 2025/

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

Note, wave height forecasts are for ice free areas.

$$

LSZ263-022100-
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 Tue Dec 2 2025

.EARLY THIS MORNING...Southwest winds 10 to 20 knots. A chance of
snow showers. Waves 3 to 5 feet occasionally to 7 feet.
.TODAY...Southwest winds 15 to 25 knots. A chance of snow
showers. Waves building to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...Southwest winds 15 to 25 knots veering northwest late.
Snow showers likely. Waves building to 5 to 8 feet occasionally
to 10 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots. Freezing spray. A
chance of snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet.
.WEDNESDAY NIGHT...Northwest winds 20 to 30 knots. Freezing
spray. A slight chance of snow showers. Waves building to 6 to
9 feet occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.THURSDAY...West winds 15 to 25 knots becoming southwest gales to
35 knots in the afternoon. Freezing spray in the morning. Waves
subsiding to 2 to 4 feet, then building to 5 to 8 feet
occasionally to 10 feet.
.THURSDAY NIGHT...Southwest gales to 40 knots becoming west 20 to
30 knots after midnight. Freezing spray in the evening. Snow
showers likely in the evening, then a chance of snow showers
after midnight. Waves building to 5 to 9 feet occasionally to
11 feet.
.FRIDAY...West winds 15 to 25 knots veering northwest. A chance
of snow showers. Waves subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-022100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 AM EST Tue Dec 2 2025

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Snow
showers likely. Waves 3 to 5 feet occasionally to 7 feet.
.TODAY...Southwest winds 15 to 25 knots. A chance of snow
showers. Waves building to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...Southwest winds 15 to 25 knots veering northwest late.
Snow showers likely. Waves building to 4 to 8 feet occasionally
to 10 feet.
.WEDNESDAY...Northwest winds to 30 knots with a few gale force
gusts to 35 knots possible. 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.
.WEDNESDAY NIGHT...Northwest gales to 35 knots diminishing to
20 to 30 knots after midnight. 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.
.THURSDAY...Northwest winds 15 to 25 knots becoming southwest
20 to 30 knots in the afternoon. Freezing spray in the morning.
Waves subsiding to 2 to 4 feet, then building to 4 to 7 feet
occasionally to 9 feet.
.THURSDAY NIGHT...Southwest winds 20 to 30 knots veering west
after midnight. Freezing spray in the evening. Snow showers
likely in the evening, then a chance of snow showers after
midnight. Waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 5 to 8 feet occasionally to 10 feet.
.FRIDAY...West winds 15 to 25 knots veering northwest. A chance
of snow showers. Waves subsiding to 2 to 4 feet, then building to
3 to 6 feet occasionally to 8 feet.
.SATURDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-022100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 AM EST Tue Dec 2 2025

.EARLY THIS MORNING...West winds 15 to 25 knots. A slight chance
of snow showers. Waves 2 to 4 feet.
.TODAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.TONIGHT...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots by midnight, then becoming west 20 to 30 knots late. A
chance of snow showers in the evening, then snow showers likely
after midnight. Waves building to 3 to 6 feet occasionally to
8 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots increasing to
30 knots with a few gale force gusts to 40 knots possible. Snow
showers. Freezing spray in the afternoon. Waves building to 5 to
9 feet occasionally to 11 feet.
.WEDNESDAY NIGHT...Northwest gales to 40 knots. Freezing spray.
Snow showers in the evening. A chance of snow showers after
midnight. Waves building to 5 to 9 feet occasionally to 11 feet.
.THURSDAY...Northwest winds 20 to 30 knots backing southwest in
the afternoon. Freezing spray in the morning. A chance of snow
showers. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.THURSDAY NIGHT...Southwest gales to 35 knots diminishing to
20 to 30 knots after midnight. Snow showers likely. Waves
building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...West winds 15 to 25 knots. A chance of snow showers,
then snow showers likely. Waves subsiding to 1 to 3 feet, then
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 subsiding to 1 to
3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-022100-
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 Tue Dec 2 2025

.EARLY THIS MORNING...West winds 15 to 25 knots. A chance of snow
showers. Waves 3 to 5 feet occasionally to 7 feet.
.TODAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots. A chance of snow showers in the morning. Waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...Southwest winds 20 to 30 knots veering west late. A
chance of snow showers in the evening, then snow showers after
midnight. Waves building to 4 to 8 feet occasionally to 10 feet.
.WEDNESDAY...Northwest winds to 30 knots with a few gale force
gusts to 40 knots possible. Snow showers. Freezing spray in the
afternoon. Waves building to 8 to 12 feet occasionally to
15 feet.
.WEDNESDAY NIGHT...Northwest gales to 40 knots. Freezing spray.
Snow showers. Waves subsiding to 7 to 10 feet occasionally to
13 feet, then building to 9 to 12 feet occasionally to 15 feet.
.THURSDAY...Northwest winds 20 to 30 knots backing southwest in
the afternoon. Freezing spray in the morning. Snow showers in the
morning, then a chance of snow showers in the afternoon. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...Southwest winds 20 to 30 knots. Freezing spray.
Snow showers. Waves building to 5 to 9 feet occasionally to
11 feet.
.FRIDAY...West winds 15 to 25 knots. A chance of snow showers,
then snow showers. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.SATURDAY...Northwest winds 15 to 25 knots. A chance of snow
showers. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-022100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 AM EST Tue Dec 2 2025

.EARLY THIS MORNING...West winds 15 to 25 knots. A slight chance
of snow showers. Waves 3 to 5 feet occasionally to 7 feet.
.TODAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. A slight chance of snow showers in the
morning. Waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet.
.TONIGHT...Southwest winds 20 to 30 knots. A chance of snow
showers in the evening, then snow showers after midnight. Waves
building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...West winds to 30 knots with a few gale force gusts
to 35 knots possible veering northwest. Snow showers. Waves
subsiding to 4 to 7 feet occasionally to 9 feet, then building to
9 to 12 feet occasionally to 15 feet.
.WEDNESDAY NIGHT...Northwest gales to 35 knots. Freezing spray.
Snow showers. Waves subsiding to 7 to 10 feet occasionally to
13 feet, then building to 8 to 11 feet occasionally to 14 feet.
.THURSDAY...Northwest winds 20 to 30 knots backing west in the
afternoon. Freezing spray in the morning. Snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...Southwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. Freezing spray. Snow showers.
Waves building to 5 to 9 feet occasionally to 11 feet.
.FRIDAY...Southwest winds 20 to 30 knots veering west. Snow
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...Northwest winds 20 to 30 knots becoming north 15 to
25 knots. Snow showers likely. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-021500-
MAFOR 0210/
Superior West 11520 12530 12540 11537 11637 11730. Waves 2 to 4
feet building to 3 to 6 feet today. Waves 4 to 7 feet subsiding
to 3 to 6 feet tonight.

Superior North Central 11617 13530 11540 11547 11637 11737. Waves
3 to 5 feet subsiding to 2 to 4 feet, then building to 4 to 7
feet today. Waves 5 to 8 feet tonight.

Superior South Central 11630 13520 12530 11537 11647. Waves 2 to
4 feet subsiding to 1 to 3 feet, then building to 2 to 4 feet
today. Waves 2 to 4 feet building to 3 to 6 feet tonight.

Superior East 11620 12520 13530 12547. Waves 3 to 5 feet today.
Waves 5 to 8 feet tonight.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes