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FZUS63 KMQT 071506 CCA
GLFLS

Open Lake Forecast for Lake Superior...CORRECTED
National Weather Service Marquette MI
1006 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 30.5 inch high becoming centered over Minnesota by this afternoon
slides over the Great Lakes basin tonight into 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 30.1 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-
1006 AM EST Sun Dec 7 2025 /906 AM CST Sun Dec 7 2025/

.REST OF TODAY...Northwest winds 10 to 20 knots. Waves 1 to
3 feet 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 2 to 4 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 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...North winds 20 to 30 knots diminishing to 10 to
20 knots. A chance of snow showers. Waves building to 6 to 9 feet
occasionally to 11 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 2 to
4 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-
1006 AM EST Sun Dec 7 2025

.REST OF TODAY...Northwest winds 10 to 20 knots. A slight chance
of snow showers late in the morning. Waves 3 to 5 feet
occasionally to 7 feet 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 7 to 10 feet
occasionally to 13 feet.
.WEDNESDAY...North gales to 35 knots diminishing to 15 to
25 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 1 to 3 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.

$$

LSZ264-072100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1006 AM EST Sun Dec 7 2025

.REST OF TODAY...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots by mid afternoon. Freezing spray late in the
morning. A slight chance of snow showers. Waves 3 to 6 feet
occasionally to 8 feet 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. A slight chance of snow showers. 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 7 to 10 feet
occasionally to 13 feet.
.WEDNESDAY...North gales to 35 knots diminishing to 15 to
25 knots. Freezing spray. Waves building to 8 to 11 feet
occasionally to 14 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-
1006 AM EST Sun Dec 7 2025

.REST OF TODAY...Northwest winds 20 to 30 knots. Freezing spray.
A chance of snow showers. Waves 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 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 6 to 9 feet
occasionally to 11 feet, then subsiding to 2 to 4 feet.
.THURSDAY...Northwest winds 15 to 25 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.

$$

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-
1006 AM EST Sun Dec 7 2025

.REST OF TODAY...Northwest winds 20 to 30 knots. Freezing spray.
A chance of snow showers. Waves 4 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 5 to 9 feet occasionally to 11 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 2 to 4 feet.
.TUESDAY NIGHT...Northeast winds 10 to 20 knots increasing to
20 to 30 knots after midnight. A chance of snow showers. Waves
subsiding to 1 to 3 feet, then building to 5 to 8 feet
occasionally to 10 feet.
.WEDNESDAY...North gales to 35 knots diminishing to 15 to
25 knots. A chance of snow showers. Waves building to 6 to 9 feet
occasionally to 11 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 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.

$$

LSZ267-072100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1006 AM EST Sun Dec 7 2025

.REST OF TODAY...Northwest winds 20 to 30 knots increasing to
30 knots with a few gale force gusts to 35 knots possible by mid
afternoon. Freezing spray. Snow showers likely late in the
morning. A chance of snow showers in the afternoon. Waves 4 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 6 feet
occasionally to 8 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. A chance of snow showers,
then snow showers likely. Waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-072100-
MAFOR 0716/
Superior West 11720 12710 11700 11600 11510 12520. Waves 1 to 3
feet this afternoon. Waves 2 feet or less tonight. Waves 1 to 3
feet Monday morning.

Superior North Central 12730 12720 11710 12610 11520. Waves 3 to
6 feet this afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet
tonight. Waves 1 to 3 feet Monday morning.

Superior South Central 11730 11740 12730 11720 11610 11510 11520.
A chance of snow showers this afternoon. Waves 4 to 7 feet this
afternoon. Waves 3 to 6 feet subsiding to 1 to 3 feet tonight.
Waves 1 to 2 feet Monday morning.

Superior East 11730 12740 11730 11720 11710 11620 11520. A chance
of snow showers this afternoon and evening. Waves 5 to 8 feet
this afternoon. Waves 4 to 7 feet subsiding to 3 to 5 feet
tonight. Waves 2 to 4 feet Monday morning.

$$

WFO MQT

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

Graphical marine forecasts are available online at:
weather.gov/greatlakes