756
FZUS63 KMQT 300901
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM EST Tue Dec 30 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 29.0 inch low moves into eastern Quebec this morning as 30.1 inch
ridging overspreads the Upper Midwest. The low will continue to lift
north and then retrograde westward to the Hudson Bay tonight into
Wednesday. As the aforementioned ridge slides southeast it will
extend a 30.1 inch ridge over Lake Superior today, before a 29.9
inch trough builds over the lake tonight. The low will remain over
the Hudson Bay through the rest of the week extending 29.8 inch
troughing southwest over Lake Superior.


LSZ162-302100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 AM EST Tue Dec 30 2025 /300 AM CST Tue Dec 30 2025/

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TODAY...West winds 5 to 15 knots veering northwest by mid
afternoon. Patchy fog in the morning. A chance of snow showers in
the morning, then snow showers likely in the afternoon. Waves
calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots increasing to 15 to
25 knots by midnight. A chance of snow showers, possibly mixed
with freezing rain. Waves building to 3 to 5 feet occasionally to
7 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots. A slight chance of snow showers in the morning. Waves
3 to 5 feet occasionally to 7 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots. Waves 3 to
5 feet occasionally to 7 feet.
.THURSDAY...West winds 15 to 25 knots. A chance of snow showers
in the afternoon. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots. Waves subsiding to
1 to 3 feet.
.FRIDAY...West winds 10 to 20 knots veering northwest. Waves
subsiding to calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-302100-
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 30 2025

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Waves 3 to
5 feet occasionally to 7 feet.
.TODAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by late morning, then veering north by mid afternoon.
Patchy dense fog in the morning. A chance of snow showers in the
morning, then snow showers likely in the afternoon. Waves
subsiding to calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots by midnight, then backing northwest late. A chance of
snow showers. Waves building to 3 to 6 feet occasionally to
8 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots. Heavy freezing
spray. A chance of snow showers. Waves building to 4 to 7 feet
occasionally to 9 feet.
.WEDNESDAY NIGHT...Northwest winds 20 to 30 knots. Heavy freezing
spray. Waves building to 4 to 8 feet occasionally to 10 feet.
.THURSDAY...Northwest winds 20 to 30 knots backing west in the
afternoon. Heavy freezing spray. A chance of snow showers in the
afternoon. Waves 5 to 8 feet occasionally to 10 feet.
.THURSDAY NIGHT...West winds 20 to 30 knots veering northwest
after midnight. Freezing spray. A chance of snow showers. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Waves subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-302100-
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 30 2025

.EARLY THIS MORNING...North winds 20 to 30 knots. Heavy freezing
spray and patchy fog. Waves 5 to 9 feet occasionally to 11 feet.
.TODAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then veering north by mid afternoon.
Freezing spray and patchy fog in the morning. A chance of snow
showers. Waves subsiding to 1 to 3 feet.
.TONIGHT...North winds 15 to 25 knots increasing to 20 to
30 knots late. A chance of snow showers. Heavy freezing spray
after midnight. Waves building to 5 to 8 feet occasionally to
10 feet.
.WEDNESDAY...Northwest winds to 30 knots with a few gale force
gusts to 35 knots possible. Heavy freezing spray. A chance of
snow showers. Waves building to 8 to 11 feet occasionally to
14 feet.
.WEDNESDAY NIGHT...Northwest gales to 35 knots. Heavy freezing
spray. Waves subsiding to 7 to 10 feet occasionally to 13 feet,
then building to 8 to 11 feet occasionally to 14 feet.
.THURSDAY...Northwest gales to 35 knots backing west in the
afternoon. Heavy freezing spray. Waves subsiding to 6 to 9 feet
occasionally to 11 feet.
.THURSDAY NIGHT...West gales to 35 knots veering northwest after
midnight. Heavy freezing spray. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.FRIDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. Heavy freezing spray. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-302100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 AM EST Tue Dec 30 2025

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. Freezing
spray. A slight chance of snow showers. Waves 6 to 9 feet
occasionally to 11 feet.
.TODAY...Northwest winds 15 to 25 knots. Freezing spray in the
morning. A chance of snow showers. Waves subsiding to 2 to
4 feet.
.TONIGHT...Northwest winds 15 to 25 knots increasing to 20 to
30 knots by midnight. A chance of snow showers. Freezing spray
after midnight. Waves building to 5 to 8 feet occasionally to
10 feet.
.WEDNESDAY...Northwest winds to 30 knots with a few gale force
gusts to 35 knots possible. Heavy freezing spray. A chance of
snow showers. Waves building to 8 to 11 feet occasionally to
14 feet.
.WEDNESDAY NIGHT...Northwest gales to 40 knots. Heavy freezing
spray. A slight chance of snow showers. Waves subsiding to 7 to
10 feet occasionally to 13 feet.
.THURSDAY...Northwest gales to 40 knots becoming west gales to
35 knots in the afternoon. Heavy freezing spray. A chance of snow
showers. Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.THURSDAY NIGHT...West gales to 35 knots veering northwest after
midnight. Heavy freezing spray. A chance of snow showers. Waves
5 to 8 feet occasionally to 10 feet.
.FRIDAY...Northwest gales to 35 knots. Freezing spray. Waves
subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 15 to 25 knots. Waves subsiding to
calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-302100-
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 30 2025

...GALE WARNING IN EFFECT UNTIL 7 AM EST THIS MORNING...

.EARLY THIS MORNING...Northwest gales to 35 knots. Freezing
spray. A slight chance of snow showers. Waves 10 to 14 feet
occasionally to 18 feet subsiding to 9 to 12 feet occasionally to
15 feet.
.TODAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming north 20 to
30 knots by midnight, then increasing to gales to 35 knots late.
Freezing spray. Patchy dense fog after midnight. A chance of snow
showers. Waves building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY...Northwest gales to 45 knots. Heavy freezing spray.
Snow showers. Waves building to 10 to 14 feet occasionally to
18 feet.
.WEDNESDAY NIGHT...Northwest gales to 40 knots. Heavy freezing
spray. A chance of snow showers. Waves building to 11 to 15 feet
occasionally to 19 feet.
.THURSDAY...Northwest gales to 35 knots backing west in the
afternoon. Heavy freezing spray. A chance of snow showers. Waves
subsiding to 10 to 14 feet occasionally to 18 feet.
.THURSDAY NIGHT...West gales to 40 knots becoming northwest gales
to 35 knots after midnight. Freezing spray. A chance of snow
showers. Waves subsiding to 8 to 11 feet occasionally to 14 feet.
.FRIDAY...Northwest gales to 35 knots. Freezing spray. A chance
of 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 subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-302100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 AM EST Tue Dec 30 2025

...GALE WARNING IN EFFECT UNTIL 7 AM EST THIS MORNING...

.EARLY THIS MORNING...Northwest gales to 35 knots. Freezing
spray. A slight chance of snow showers. Waves 10 to 14 feet
occasionally to 18 feet subsiding to 9 to 12 feet occasionally to
15 feet.
.TODAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 20 to 30 knots veering north by
midnight. Freezing spray. A chance of snow showers. Waves
building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...North gales to 35 knots becoming northwest gales to
40 knots. Heavy freezing spray. Snow showers likely. Waves
building to 10 to 14 feet occasionally to 18 feet.
.WEDNESDAY NIGHT...Northwest gales to 40 knots. Heavy freezing
spray. Snow showers likely in the evening. A chance of snow
showers after midnight. Waves building to 11 to 15 feet
occasionally to 19 feet.
.THURSDAY...Northwest gales to 40 knots backing west in the
afternoon. Heavy freezing spray. A chance of snow showers. Waves
subsiding to 10 to 14 feet occasionally to 18 feet.
.THURSDAY NIGHT...West gales to 40 knots becoming northwest gales
to 35 knots after midnight. Freezing spray. Snow showers likely.
Waves subsiding to 9 to 12 feet occasionally to 15 feet.
.FRIDAY...Northwest winds 20 to 30 knots. Freezing spray. A
chance of 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 subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-301500-
MAFOR 3010/
Superior West 11710 11610 12617 11717 11820 11720 11730. A chance
of light freezing rain tonight. Waves 1 to 3 feet today. Waves 1
to 3 feet building to 2 to 4 feet tonight.

Superior North Central 11842 11730 12720 13830 11842. A chance of
snow showers this afternoon and evening. Waves 5 to 8 feet
subsiding to 2 to 4 feet today. Waves 2 to 4 feet building to 5
to 7 feet tonight.

Superior South Central...GALE WARNING IN EFFECT...12740 11730
11720 11730 12737 11740. Waves 7 to 11 feet subsiding to 3 to 5
feet today. Waves 3 to 5 feet building to 5 to 8 feet tonight.

Superior East...GALE WARNING IN EFFECT...11750 11740 14730 11830
11840. A chance of snow showers this afternoon and tonight. Waves
8 to 12 feet subsiding to 4 to 6 feet today. Waves 4 to 7 feet
tonight.

$$

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