560
FZUS63 KMQT 070300
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM EST Sat Dec 6 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 30.3 inch high over Saskatchewan continues to build into the
Northern Plains tonight, eventually strengthening to 30.4 inches
over Minnesota by tomorrow. The high continues into 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.


LSZ162-070900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EST Sat Dec 6 2025 /900 PM CST Sat Dec 6 2025/

.REST OF TONIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots by midnight, then diminishing to 10 to 20 knots
late. Isolated snow showers. Waves 1 to 3 feet building to 2 to
4 feet.
.SUNDAY...North winds 10 to 20 knots backing northwest. Isolated
snow showers in the morning. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...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 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 veering west after
midnight. Snow showers. Waves subsiding to 2 to 4 feet.
.TUESDAY...Northwest winds 5 to 15 knots veering east in the
afternoon. A chance of snow showers. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots becoming northeast
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 6 feet occasionally to 8 feet.
.WEDNESDAY...North winds 15 to 25 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...North winds 10 to 20 knots becoming northwest 15 to
25 knots. Waves building to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-070900-
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-
1000 PM EST Sat Dec 6 2025

.REST OF TONIGHT...Northwest winds 10 to 20 knots. Scattered snow
showers. Waves 1 to 3 feet building to 2 to 4 feet.
.SUNDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then backing northwest by mid
afternoon. Isolated snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots backing southwest
late. A slight chance of snow showers. Waves subsiding to calm to
2 feet.
.MONDAY...Southwest winds 15 to 25 knots. A chance of snow
showers in the afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. 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 15 to 25 knots becoming northeast
20 to 30 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 winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of snow showers. Waves subsiding to 2 to
4 feet.
.THURSDAY...North winds 10 to 20 knots increasing to 15 to
25 knots. 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.

$$

LSZ264-070900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 PM EST Sat Dec 6 2025

.REST OF TONIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots late. Scattered snow showers. Waves 1 to 3 feet
building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Freezing spray in the morning.
Scattered snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots by midnight, then backing west late. A chance of
snow showers. Waves subsiding to calm to 2 feet.
.MONDAY...Southwest winds 15 to 25 knots. A chance of snow
showers in the afternoon. 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 10 to 20 knots increasing to
20 to 30 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 winds 20 to 30 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 15 to
25 knots. Freezing spray. Waves building to 3 to 6 feet
occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-070900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 PM EST Sat Dec 6 2025

.REST OF TONIGHT...Northwest winds 10 to 20 knots increasing to
20 to 30 knots. Scattered snow showers. Waves 1 to 3 feet
building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northwest winds 20 to 30 knots. Scattered snow showers.
Freezing spray in the afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots becoming west
10 to 20 knots by midnight. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to 20 to
30 knots in the afternoon. A slight chance of snow showers in the
afternoon. Waves building to 1 to 3 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots. Snow showers.
Waves building to 2 to 4 feet, then 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. 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...North gales to 35 knots diminishing to 20 to
30 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...North winds 20 to 30 knots backing northwest. 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.

$$

LSZ266-070900-
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-
1000 PM EST Sat Dec 6 2025

.REST OF TONIGHT...Northwest winds 15 to 25 knots increasing to
20 to 30 knots late. Scattered snow showers. Waves 3 to 5 feet
occasionally to 7 feet subsiding to 2 to 4 feet, then building to
3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northwest winds 20 to 30 knots. Freezing spray.
Scattered snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet.
.SUNDAY NIGHT...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 1 to 3 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to 20 to
30 knots in the afternoon. A chance of snow showers in the
afternoon. Waves building to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...Southwest gales to 35 knots diminishing to 20 to
30 knots after midnight. Snow showers. Waves building to 4 to
8 feet occasionally to 10 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...East winds 10 to 20 knots becoming northeast
20 to 30 knots after midnight. A chance of snow showers. Waves
building to 4 to 7 feet occasionally to 9 feet.
.WEDNESDAY...North winds 20 to 30 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...North winds 15 to 25 knots increasing to 20 to
30 knots. A chance of snow showers, then snow showers likely.
Waves building to 4 to 7 feet occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-070900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 PM EST Sat Dec 6 2025

.REST OF TONIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots by midnight. Snow showers. Waves 3 to 5 feet
occasionally to 7 feet subsiding to 2 to 4 feet, then building to
3 to 6 feet occasionally to 8 feet.
.SUNDAY...North winds 15 to 25 knots becoming northwest 20 to
30 knots by late morning, then becoming north to 30 knots with a
few gale force gusts to 35 knots possible by mid afternoon.
Freezing spray. Numerous snow showers in the morning. Scattered
snow showers in the afternoon. Waves building to 5 to 8 feet
occasionally to 10 feet.
.SUNDAY NIGHT...North winds 15 to 25 knots becoming northwest
10 to 20 knots by midnight. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to 20 to
30 knots in the afternoon. A 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 4 to 8 feet occasionally to 10 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots 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...East winds 15 to 25 knots. Snow showers likely.
Waves subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY...Northeast winds 20 to 30 knots becoming north 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.

$$

LSZ261-070900-
MAFOR 0704/
Superior West 13720 11820 11720 12710 11700. Waves 2 to 4 feet
overnight. Waves 2 to 4 feet subsiding to 1 to 3 feet Sunday.
Waves 2 feet or less Sunday evening.

Superior North Central 11720 19727 14730 19737 11730 12720. Waves
3 to 6 feet overnight and Sunday. Waves 2 to 4 feet Sunday
evening.

Superior South Central 11720 19727 14730 19737 11740 12730. Waves
2 to 4 feet building to 3 to 5 feet overnight. Waves 3 to 6 feet
building to 4 to 7 feet Sunday. Waves 3 to 6 feet Sunday evening.

Superior East 11720 19727 12737 12730 19737 11740 19747 11840
11830. Waves 3 to 5 feet overnight. Waves 5 to 8 feet Sunday and
Sunday evening.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes