107
FZUS63 KMQT 090300
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM EST Mon Dec 8 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 over Upstate New York shifts farther east as a 29.8
inch low over the Canadian Prairie deepens to 29.6 inches while
moving over Lake Superior by Tuesday morning. A stronger 29.3 inch
low moving out of the Canadian Rockies will cross Lake Michigan at
29.2 inches Tuesday night, resulting in 29.5 inch troughing over
Lake Superior into Wednesday. This low will move into New England at
29.2 inches by Wednesday night, allowing 30.5 inch high pressure to
rebuild over the Northern Plains through Friday and shift east
towards the Great Lakes during the weekend.


LSZ162-090900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EST Mon Dec 8 2025 /900 PM CST Mon Dec 8 2025/

.REST OF TONIGHT...Southwest winds 15 to 25 knots becoming
northwest 10 to 20 knots late. Snow late in the evening, then a
chance of snow after midnight. Waves 3 to 5 feet occasionally to
7 feet subsiding to 2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots by late morning, then backing south by mid afternoon. A
chance of snow showers in the afternoon. Waves subsiding to calm
to 2 feet.
.TUESDAY NIGHT...East winds 10 to 20 knots becoming northeast
15 to 25 knots by midnight, then increasing to 20 to 30 knots
late. Snow showers likely in the evening, then a chance of snow
after midnight. Freezing spray after midnight. Waves building to
6 to 9 feet occasionally to 11 feet.
.WEDNESDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. A slight chance of snow. Waves
subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 knots. Waves
subsiding to calm to 2 feet.
.THURSDAY...Northwest winds 10 to 20 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots backing west
after midnight. A chance of snow showers. Waves calm to 2 feet.
.FRIDAY...Northwest winds 20 to 30 knots. A chance of snow
showers. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-090900-
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 Mon Dec 8 2025

.REST OF TONIGHT...South winds 15 to 25 knots becoming southwest
10 to 20 knots by midnight, then veering west late. Snow likely.
Waves 3 to 6 feet occasionally to 8 feet.
.TUESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. A slight 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 by 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 becoming northwest 15 to
25 knots in the afternoon. Freezing spray in the morning. A
slight chance of snow. Waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots in the afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. Waves building to 1 to 3 feet.
.FRIDAY...Northwest gales to 35 knots. Freezing spray. A chance
of snow showers. Waves building to 5 to 8 feet occasionally to
10 feet.
.SATURDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Heavy freezing spray. Waves subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-090900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 PM EST Mon Dec 8 2025

.REST OF TONIGHT...South winds 10 to 20 knots veering southwest
by midnight. A chance of snow. Waves 3 to 5 feet occasionally to
7 feet.
.TUESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by late morning, then veering north by mid afternoon. A
chance of snow showers. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 10 to 20 knots increasing to
20 to 30 knots. 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 becoming northwest 15 to
25 knots in the afternoon. Freezing spray. A slight chance of
snow. Waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to 4 to 7 feet occasionally to 9 feet.
.WEDNESDAY NIGHT...North winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A slight chance of snow showers in
the evening. Waves subsiding to 3 to 5 feet occasionally to
7 feet.
.THURSDAY...North winds 10 to 20 knots backing northwest in the
afternoon. Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots. Waves building
to 2 to 4 feet.
.FRIDAY...Northwest winds 20 to 30 knots increasing to gales to
35 knots. Freezing spray. A chance of snow showers. Waves
building to 7 to 10 feet occasionally to 13 feet.
.SATURDAY...Northwest gales to 35 knots diminishing to 15 to
25 knots. Freezing spray. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-090900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 PM EST Mon Dec 8 2025

.REST OF TONIGHT...Southwest winds 20 to 30 knots diminishing to
15 to 25 knots late. A slight chance of snow late in the evening,
then snow likely after midnight. Waves 2 to 4 feet.
.TUESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots veering northeast by
midnight, then increasing to 20 to 30 knots late. A chance of
snow showers in the evening, then snow likely after midnight.
Waves building to 4 to 7 feet occasionally to 9 feet.
.WEDNESDAY...North gales to 35 knots becoming northwest 20 to
30 knots in the afternoon. A chance of snow. 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 winds 20 to 30 knots. A chance of
snow showers. Waves subsiding to 3 to 5 feet occasionally to
7 feet.
.THURSDAY...Northwest winds 15 to 25 knots. Waves subsiding to
1 to 3 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots backing west
after midnight. A chance of snow showers. Waves subsiding to calm
to 2 feet, then building to 1 to 3 feet.
.FRIDAY...West gales to 35 knots becoming northwest gales to
40 knots. Snow showers likely. Freezing spray. Waves building to
6 to 10 feet occasionally to 13 feet.
.SATURDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-090900-
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 Mon Dec 8 2025

.REST OF TONIGHT...Southwest winds to 30 knots with a few gale
force gusts to 35 knots possible diminishing to 15 to 25 knots. A
chance of snow late in the evening, then snow likely after
midnight. Waves 5 to 9 feet occasionally to 11 feet, then
subsiding to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...West winds 15 to 25 knots veering northwest by late
morning, then diminishing to 10 to 20 knots by mid afternoon.
Snow showers likely in the morning, then a slight chance of snow
showers in the afternoon. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Northeast winds 10 to 20 knots increasing to
20 to 30 knots. A chance of snow showers. Waves subsiding to calm
to 2 feet, then building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...North gales to 35 knots. Freezing spray in the
morning. A chance of snow. Waves building to 7 to 10 feet
occasionally to 13 feet.
.WEDNESDAY NIGHT...Northwest winds 20 to 30 knots. Snow showers
likely in the evening. A chance of snow showers after midnight.
Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...North winds 15 to 25 knots backing northwest in the
afternoon. A chance of snow showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots. Snow showers
likely. Waves subsiding to 2 to 4 feet.
.FRIDAY...West gales to 35 knots veering northwest. A chance of
snow showers, then snow showers. Freezing spray. Waves building
to 9 to 12 feet occasionally to 15 feet.
.SATURDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-090900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 PM EST Mon Dec 8 2025

.REST OF TONIGHT...Southwest winds 20 to 30 knots backing south
by midnight, then veering southwest late. A chance of snow
showers late in the evening, then snow likely after midnight.
Waves 4 to 8 feet occasionally to 10 feet.
.TUESDAY...Southwest winds 15 to 25 knots veering west. Snow
showers in the morning, then a chance of snow showers in the
afternoon. Waves subsiding to 2 to 4 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots backing east by
midnight, then becoming northeast 15 to 25 knots late. A chance
of snow showers. Waves subsiding to calm to 2 feet, then building
to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...North winds 20 to 30 knots. A chance of snow. Waves
building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY NIGHT...North winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. A chance of snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...North winds 15 to 25 knots backing northwest in the
afternoon. A chance of snow showers. Waves subsiding to 2 to
4 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of snow showers. Waves
2 to 4 feet.
.FRIDAY...West winds 15 to 25 knots becoming northwest 20 to
30 knots. Snow showers. Freezing spray. Waves building to 9 to
12 feet occasionally to 15 feet.
.SATURDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Freezing spray. Snow showers likely. Waves subsiding to
3 to 6 feet occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-090900-
MAFOR 0904/
Superior West 11537 11627 12720 11610 11600 11317 11227. Waves 3
to 5 feet overnight. Waves 2 to 4 feet subsiding to 1 foot or
less Tuesday. Waves 2 feet or less Tuesday evening.

Superior North Central 11530 11527 11620 12720 11710 11810 11120.
A chance of snow showers Tuesday and Tuesday evening. Waves 3 to
5 feet overnight. Waves 2 to 4 feet Tuesday. Waves 1 to 3 feet
Tuesday evening.

Superior South Central 11440 11537 11627 11620 11720 11620 11710
11100. A chance of snow showers Tuesday and Tuesday evening.
Waves 3 to 6 feet overnight. Waves 2 to 4 feet subsiding to 1 to
3 feet Tuesday. Waves 2 feet or less Tuesday evening.

Superior East 11540 11547 11537 11637 11627 11620 12710. Waves 5
to 9 feet overnight. Waves 5 to 7 feet subsiding to 3 to 5 feet
Tuesday. Waves 2 to 3 feet Tuesday evening.

$$

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