631
FZUS63 KMQT 070901
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM EST Sun Dec 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 30.4 inch high centered over Manitoba early this morning extends
ridging southward into the Northern Plains this morning, becoming
centered over Minnesota by this afternoon. The high slides over the
Great Lakes basin Monday. By Monday afternoon, a 29.8 inch low
develops over North Dakota, eventually moving over Lake Superior
Tuesday morning as it deepens to 29.6 inches. A second, stronger
Clipper Low forms Tuesday over the Montana/Canada border, absorbing
the previous low Tuesday night at 29.2 inches as it approaches Lake
Michigan. The low lifts through southern Ontario on Wednesday while
weak 30.0 inch ridging traverses the Plains. The low quickly ejects
past the St Lawrence Seaway Thursday as high pressure over the
Canadian Rockies builds to 30.9 inches.


LSZ162-072100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 AM EST Sun Dec 7 2025 /300 AM CST Sun Dec 7 2025/

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Waves 2 to
4 feet.
.TODAY...Northwest winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots backing southwest late.
A slight chance of snow showers after midnight. Waves calm to
2 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots. A chance of snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...Southwest winds 15 to 25 knots veering west after
midnight. Snow showers in the evening, then a chance of snow
showers after midnight. Waves subsiding to 1 to 3 feet.
.TUESDAY...Northwest winds 5 to 15 knots veering northeast in the
afternoon. A chance of snow showers. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...East winds 20 to 30 knots backing northeast
after midnight. Snow showers likely in the evening, then a chance
of snow showers after midnight. Freezing spray after midnight.
Waves building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...North winds 20 to 30 knots diminishing to 10 to
20 knots. A chance of snow showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to calm to 2 feet.
.THURSDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots. A chance of snow showers. Waves building to 1 to
3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-072100-
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 Sun Dec 7 2025

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. A slight
chance of snow showers. Waves 2 to 4 feet.
.TODAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A slight chance of snow showers in the morning. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
1 to 3 feet.
.TONIGHT...Northwest winds 5 to 15 knots backing southwest late.
A slight chance of snow showers after midnight. Waves subsiding
to calm to 2 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots. A chance of snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.MONDAY NIGHT...Southwest winds 15 to 25 knots. Snow showers.
Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots in the afternoon. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.TUESDAY NIGHT...East winds 20 to 30 knots becoming northeast
gales to 35 knots after midnight. A chance of snow showers.
Freezing spray after midnight. Waves building to 5 to 8 feet
occasionally to 10 feet.
.WEDNESDAY...North gales to 35 knots diminishing to 15 to
25 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 2 to 4 feet.
.THURSDAY...North winds 10 to 20 knots increasing to 20 to
30 knots. A chance of snow showers. Waves subsiding to 1 to
3 feet, then building to 3 to 5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-072100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 AM EST Sun Dec 7 2025

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

Note, wave height forecasts are for ice free areas.

$$

LSZ265-072100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 AM EST Sun Dec 7 2025

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. A chance of
snow showers. Waves 2 to 4 feet building to 3 to 5 feet
occasionally to 7 feet.
.TODAY...Northwest winds 20 to 30 knots. A chance of snow
showers. Freezing spray in the afternoon. Waves building to 3 to
6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming west 10 to
20 knots by midnight. A slight chance of snow showers in the
evening. Waves subsiding to calm to 2 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to 20 to
30 knots. A slight chance of snow showers in the afternoon. Waves
building to 2 to 4 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Snow showers. Waves subsiding to
1 to 3 feet.
.TUESDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.TUESDAY NIGHT...East winds 10 to 20 knots becoming northeast
20 to 30 knots after midnight. Snow showers likely. Waves
building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...North gales to 35 knots diminishing to 15 to
25 knots. A chance of snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots. A chance of snow showers. Waves subsiding to 2 to
4 feet, then building to 3 to 6 feet occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-072100-
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 Sun Dec 7 2025

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

Note, wave height forecasts are for ice free areas.

$$

LSZ267-072100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 AM EST Sun Dec 7 2025

.EARLY THIS MORNING...Northwest winds 15 to 25 knots. Snow
showers. Waves 3 to 6 feet occasionally to 8 feet.
.TODAY...Northwest winds 15 to 25 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible. Freezing spray.
Snow showers likely in the morning. A chance of snow showers in
the afternoon. Waves building to 5 to 8 feet occasionally to
10 feet.
.TONIGHT...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots by midnight, then backing west late. A chance of snow
showers. Waves subsiding to 2 to 4 feet.
.MONDAY...West winds 15 to 25 knots becoming southwest 20 to
30 knots. A slight chance of snow showers. Waves building to 3 to
6 feet occasionally to 8 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots. Snow showers.
Waves building to 6 to 9 feet occasionally to 11 feet, then
subsiding to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...Southwest winds 15 to 25 knots veering west in the
afternoon. Snow showers in the morning, then a chance of snow
showers in the afternoon. Waves subsiding to 2 to 4 feet.
.TUESDAY NIGHT...Northeast winds 10 to 20 knots becoming east
15 to 25 knots after midnight. Snow showers likely. Waves
subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY...North 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 2 to 4 feet.
.THURSDAY...North winds 15 to 25 knots. A chance of snow showers,
then snow showers likely. Waves building to 3 to 5 feet
occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-071500-
MAFOR 0710/
Superior West 13720 12710 11700 11600 11510. Waves 2 to 4 feet
subsiding to 1 to 3 feet today. Waves 2 feet or less tonight.

Superior North Central 14730 12720 11710 11610. A chance of snow
showers this morning. Waves 3 to 6 feet today. Waves 2 to 4 feet
subsiding to 1 to 3 feet tonight.

Superior South Central 13730 11740 12730 11720 11610. A chance of
snow showers today. Waves 3 to 6 feet building to 4 to 7 feet
today. Waves 3 to 6 feet subsiding to 1 to 3 feet tonight.

Superior East 11737 12730 12740 11730 11720 11710. Waves 3 to 5
feet building to 5 to 8 feet today. Waves 4 to 7 feet subsiding
to 3 to 5 feet tonight.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes