107
FZUS63 KMQT 242101
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EST Mon Nov 24 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 29.8 inch trough was over Lake Superior late this afternoon.
Tonight into Tuesday, a 29.8 inch low will organize just west of the
Great Lakes, deepening to 29.6 inches Tuesday night over the Upper
Peninsula and passing over eastern Lake Superior at 29.3 inches
Wednesday. This low deepens further to 29.2 inches over Quebec
Thursday while 30.5 inch high pressure builds over the Northern
Great Plains. This high moves over Lake Superior Friday into the
weekend.


LSZ162-250900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EST Mon Nov 24 2025 /300 PM CST Mon Nov 24 2025/

...GALE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH THURSDAY
MORNING...

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...North winds 5 to 15 knots becoming northeast 10 to
20 knots by midnight, then increasing to 15 to 25 knots late. A
slight chance of rain showers after midnight. Waves building to
2 to 4 feet.
.TUESDAY...Northeast winds 15 to 25 knots increasing to 20 to
30 knots. A chance of rain showers in the morning, then rain
showers likely with pockets of snow showers in the afternoon.
Waves building to 5 to 8 feet occasionally to 10 feet.
.TUESDAY NIGHT...Northeast gales to 35 knots becoming north gales
to 40 knots by midnight. A slight chance of rain showers in the
evening. Snow showers. Waves building to 9 to 12 feet
occasionally to 15 feet.
.WEDNESDAY...North gales to 40 knots backing northwest in the
afternoon. Snow showers. Waves subsiding to 7 to 10 feet
occasionally to 13 feet.
.WEDNESDAY NIGHT...Northwest gales to 35 knots diminishing to
20 to 30 knots after midnight. A chance of snow showers. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...Northwest winds 20 to 30 knots. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots. Waves subsiding
to 1 to 3 feet.
.FRIDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots veering northwest. Waves
calm to 2 feet.

$$

LSZ263-250900-
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 PM EST Mon Nov 24 2025

...GALE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH THURSDAY
MORNING...

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Waves 1 to
3 feet.
.TONIGHT...North winds 5 to 15 knots veering northeast by
midnight, then increasing to 10 to 20 knots late. A slight chance
of rain showers after midnight. Waves subsiding to calm to
2 feet, then building to 2 to 4 feet.
.TUESDAY...Northeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. A chance of rain showers in the
morning, then rain showers likely with pockets of snow showers in
the afternoon. Waves building to 5 to 8 feet occasionally to
10 feet.
.TUESDAY NIGHT...Northeast gales to 40 knots backing north late.
Rain showers in the evening. Snow showers. A slight chance of
rain showers after midnight. Waves building to 11 to 15 feet
occasionally to 19 feet.
.WEDNESDAY...North gales to 45 knots. Snow showers. Waves
building to 12 to 17 feet occasionally to 21 feet, then subsiding
to 11 to 15 feet occasionally to 19 feet.
.WEDNESDAY NIGHT...Northwest gales to 40 knots. Snow showers
likely in the evening, then a chance of snow showers after
midnight. Waves subsiding to 8 to 11 feet occasionally to
14 feet.
.THURSDAY...Northwest gales to 40 knots. A chance of snow
showers. Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.THURSDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. A chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots veering northwest. Waves
calm to 2 feet.

$$

LSZ264-250900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EST Mon Nov 24 2025

...GALE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH THURSDAY
EVENING...

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TONIGHT...North winds 5 to 15 knots veering northeast by
midnight. Waves 1 to 3 feet.
.TUESDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of rain showers. A chance of
snow showers in the afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY NIGHT...Northeast winds 20 to 30 knots increasing to
gales to 45 knots by midnight. Rain showers in the evening. Snow
showers. A slight chance of rain showers after midnight. Waves
building to 12 to 17 feet occasionally to 21 feet.
.WEDNESDAY...North gales to 45 knots. Snow showers. Waves
building to 15 to 20 feet occasionally to 25 feet, then subsiding
to 12 to 17 feet occasionally to 21 feet.
.WEDNESDAY NIGHT...North gales to 45 knots backing northwest
after midnight. Snow showers in the evening, then a chance of
snow showers after midnight. Waves subsiding to 12 to 17 feet
occasionally to 21 feet.
.THURSDAY...Northwest gales to 40 knots. A chance of snow
showers. Waves subsiding to 9 to 12 feet occasionally to 15 feet.
.THURSDAY NIGHT...Northwest gales to 35 knots diminishing to
20 to 30 knots after midnight. A chance of snow showers. Waves
subsiding to 5 to 8 feet occasionally to 10 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots backing west. Waves
calm to 2 feet.

$$

LSZ265-250900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EST Mon Nov 24 2025

...GALE WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH THURSDAY
EVENING...

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...North winds 5 to 15 knots becoming northeast 10 to
20 knots by midnight. A slight chance of rain showers after
midnight. Waves building to 1 to 3 feet.
.TUESDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of rain showers in the
morning, then rain showers in the afternoon. Waves building to
3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...Northeast winds 20 to 30 knots increasing to
gales to 40 knots by midnight. Rain showers. Snow showers after
midnight. Waves building to 10 to 14 feet occasionally to
18 feet.
.WEDNESDAY...North gales to 45 knots increasing to storm force
winds to 50 knots in the afternoon. Snow showers, possibly mixed
with rain. Waves building to 15 to 20 feet occasionally to
25 feet.
.WEDNESDAY NIGHT...Northwest storm force winds to 50 knots. Snow
showers. Waves subsiding to 12 to 17 feet occasionally to
21 feet.
.THURSDAY...Northwest gales to 45 knots. Snow showers. Waves
subsiding to 9 to 12 feet occasionally to 15 feet.
.THURSDAY NIGHT...Northwest gales to 35 knots. Snow showers
likely in the evening, then a chance of snow showers after
midnight. Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of snow showers. Waves subsiding to calm to
2 feet.
.SATURDAY...West winds 10 to 20 knots. A chance of snow showers.
Waves calm to 2 feet.

$$

LSZ266-250900-
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 PM EST Mon Nov 24 2025

...GALE WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH LATE
THURSDAY NIGHT...

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves 2 to
4 feet.
.TONIGHT...North winds 5 to 15 knots veering northeast by
midnight. A slight chance of rain showers after midnight. Waves
subsiding to 1 to 3 feet.
.TUESDAY...Northeast winds 5 to 15 knots increasing to 15 to
25 knots. A chance of rain showers in the morning, then rain
showers in the afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY NIGHT...Northeast winds 20 to 30 knots increasing to
gales to 40 knots by midnight. Rain showers, possibly mixed with
snow. Waves building to 10 to 14 feet occasionally to 18 feet.
.WEDNESDAY...North gales to 45 knots. Rain showers in the
morning. Snow showers. A slight chance of rain showers in the
afternoon. Waves building to 15 to 20 feet occasionally to
25 feet.
.WEDNESDAY NIGHT...North storm force winds to 50 knots. Snow
showers. Waves building to 17 to 22 feet occasionally to 28 feet,
then subsiding to 15 to 20 feet occasionally to 25 feet.
.THURSDAY...Northwest gales to 45 knots. Snow showers. Waves
subsiding to 15 to 20 feet occasionally to 25 feet.
.THURSDAY NIGHT...Northwest gales to 40 knots. Snow showers.
Waves subsiding to 8 to 11 feet occasionally to 14 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Snow showers likely. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots. Snow showers likely. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.

$$

LSZ267-250900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EST Mon Nov 24 2025

...GALE WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH LATE
THURSDAY NIGHT...

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. Waves 2 to
4 feet.
.TONIGHT...Southwest winds 5 to 15 knots backing east late. A
slight chance of rain showers. Waves subsiding to calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots increasing to 10 to 20 knots.
Rain showers. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots increasing to 20 to
30 knots late. Rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet.
.WEDNESDAY...East winds 20 to 30 knots becoming north gales to
40 knots in the afternoon. Rain showers. Snow showers in the
afternoon. Waves building to 9 to 12 feet occasionally to
15 feet.
.WEDNESDAY NIGHT...North gales to 40 knots becoming northwest
gales to 45 knots after midnight. Snow showers. Waves building to
15 to 20 feet occasionally to 25 feet.
.THURSDAY...Northwest gales to 45 knots. Snow showers. Waves
subsiding to 12 to 17 feet occasionally to 21 feet.
.THURSDAY NIGHT...Northwest gales to 40 knots. Snow showers.
Waves subsiding to 8 to 11 feet occasionally to 14 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots. Snow showers likely. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots backing southwest. Snow
showers likely. Waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.

$$

LSZ261-250300-
MAFOR 2422/
Superior West 11700 11110 13120 12130 11146. Waves 1 to 3 feet
building to 2 to 4 feet tonight. Waves 3 to 6 feet building to 5
to 8 feet Tuesday.

Superior North Central 11710 11820 12110 12120 12130. A chance of
rain showers Tuesday afternoon. Waves 2 to 4 feet tonight. Waves
2 to 4 feet building to 3 to 5 feet Tuesday.

Superior South Central 11700 11810 14110 12126. Waves 1 to 3 feet
tonight. Waves 2 to 4 feet Tuesday.

Superior East 11510 11600 11800 11100 11110 11220 11126 11136.
Waves 2 to 4 feet subsiding to 1 to 2 feet tonight. Waves 1 to 3
feet building to 3 to 5 feet Tuesday.

$$

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