243
FZUS63 KMQT 252101
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EST Tue Nov 25 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 29.7 inch low currently over Minneapolis will deepen to 29.4
inches over eastern Upper Michigan by Wednesday afternoon. By
Thursday, the low will shift into Quebec, maintining 29.4 inches.
Meanwhile, a 30.6 inch high will develop over the Canadian Prairie.
With the low lifting further northeast for Friday, the high will
weaken slightly to 30.5 inches as it moves into the Mississippi
River Valley. The high then shifts over the Lower Great Lakes
Saturday morning while 29.7 inch low pressure develops over the OK
Panhandle. This low ejects northeast, reaching the Upper Great Lakes
at 29.7 inches Sunday afternoon. Monday, the low will lift into
Quebec at 29.5 inches while 30.5 inch high pressure builds over the
Central Plains.


LSZ162-260900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EST Tue Nov 25 2025 /300 PM CST Tue Nov 25 2025/

...GALE WARNING IN EFFECT THROUGH THURSDAY MORNING...

.LATE THIS AFTERNOON...Northeast gales to 35 knots. A chance of
rain and snow showers. Waves 5 to 9 feet occasionally to 11 feet.
.TONIGHT...Northeast gales to 35 knots becoming north gales to
45 knots by midnight. Rain showers in the evening. Snow showers.
Waves building to 12 to 17 feet occasionally to 21 feet.
.WEDNESDAY...North gales to 40 knots backing northwest by mid
afternoon. Snow showers likely in the morning, then a chance of
snow showers in the afternoon. Waves subsiding to 9 to 12 feet
occasionally to 15 feet.
.WEDNESDAY NIGHT...Northwest gales to 40 knots. A chance of snow
showers. Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.THURSDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots in the afternoon. A slight chance of snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.FRIDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...North winds 5 to 15 knots increasing to 10 to
20 knots. A chance of snow showers. Waves building to 1 to
3 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.

$$

LSZ263-260900-
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 Tue Nov 25 2025

...GALE WARNING IN EFFECT THROUGH THURSDAY AFTERNOON...

.LATE THIS AFTERNOON...Northeast winds 20 to 30 knots. A chance
of rain showers, possibly mixed with snow. Waves 5 to 9 feet
occasionally to 11 feet.
.TONIGHT...Northeast gales to 40 knots becoming north gales to
45 knots late. Rain showers in the evening. Snow showers. A
slight chance of rain showers after midnight. Waves building to
15 to 20 feet occasionally to 25 feet.
.WEDNESDAY...North gales to 45 knots with a few storm force gusts
to 50 knots possible diminishing to gales to 45 knots. Snow
showers. Waves subsiding to 12 to 17 feet occasionally to
21 feet.
.WEDNESDAY NIGHT...North gales to 45 knots becoming northwest
gales to 40 knots by midnight. A chance of snow showers. Waves
subsiding to 9 to 12 feet occasionally to 15 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. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...North winds 5 to 15 knots increasing to 15 to
25 knots. A chance of snow showers. Waves building to 2 to
4 feet.
.SUNDAY...Northwest winds 15 to 25 knots. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.

$$

LSZ264-260900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EST Tue Nov 25 2025

...GALE WARNING IN EFFECT FROM 10 PM EST THIS EVENING THROUGH
THURSDAY EVENING...

.LATE THIS AFTERNOON...Northeast winds 20 to 30 knots. A chance
of rain showers, possibly mixed with snow. Waves 4 to 7 feet
occasionally to 9 feet.
.TONIGHT...Northeast gales to 45 knots. Rain showers likely 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 with a few storm force gusts
to 50 knots possible diminishing to gales to 45 knots. Snow
showers. Waves building to 15 to 20 feet occasionally to 25 feet.
.WEDNESDAY NIGHT...North gales to 45 knots. 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. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots becoming north 15 to
25 knots. A chance of snow showers. Waves building to 2 to
4 feet.
.SUNDAY...Northwest winds 15 to 25 knots. A chance of snow
showers. Waves building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ265-260900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EST Tue Nov 25 2025

...GALE WARNING IN EFFECT FROM 10 PM EST THIS EVENING THROUGH
THURSDAY EVENING...

.LATE THIS AFTERNOON...Northeast winds 20 to 30 knots. Rain
showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northeast gales to 45 knots. Rain showers. Snow
showers after midnight. Waves building to 10 to 14 feet
occasionally to 18 feet.
.WEDNESDAY...Northeast gales to 45 knots backing north by late
morning, then increasing to gales to 45 knots with a few storm
force gusts to 50 knots possible by mid afternoon. A slight
chance of rain showers in the morning. Snow showers. Waves
building to 15 to 20 feet occasionally to 25 feet.
.WEDNESDAY NIGHT...North gales to 45 knots with a few storm force
gusts to 55 knots possible becoming northwest gales to 45 knots
with a few storm force gusts to 50 knots possible late. 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 40 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 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. A chance of snow showers. Waves
subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots backing west after
midnight. A chance of snow showers. Waves subsiding to calm to
2 feet.
.SATURDAY...West winds 10 to 20 knots becoming north 15 to
25 knots. Snow showers likely. Waves building to 1 to 3 feet.
.SUNDAY...Northwest winds 20 to 30 knots becoming west 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.

$$

LSZ266-260900-
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 Tue Nov 25 2025

...GALE WARNING IN EFFECT FROM 1 AM EST WEDNESDAY THROUGH LATE
THURSDAY NIGHT...

.LATE THIS AFTERNOON...Northeast winds 20 to 30 knots. Rain
showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...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...Northeast gales to 45 knots backing north. 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 gales to 45 knots with a few storm force
gusts to 55 knots possible. 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...North gales to 45 knots backing northwest in the
afternoon. 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 9 to 12 feet occasionally to 15 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. Snow showers. Waves subsiding to 4 to
7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots backing west after
midnight. Snow showers likely in the evening. A chance of snow
showers after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots veering north. Snow
showers. Waves subsiding to calm to 2 feet, then building to 2 to
4 feet.
.SUNDAY...Northwest winds 20 to 30 knots. A chance of snow
showers, then snow showers likely. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ267-260900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EST Tue Nov 25 2025

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

.LATE THIS AFTERNOON...East winds 15 to 25 knots. Rain showers.
Waves 3 to 5 feet occasionally to 7 feet.
.TONIGHT...East winds 20 to 30 knots. Rain showers. Waves
building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY...East gales to 35 knots backing north by mid
afternoon. Rain showers in the morning. Snow showers. A slight
chance of rain showers in the afternoon. Waves building to 9 to
12 feet occasionally to 15 feet.
.WEDNESDAY NIGHT...North gales to 45 knots. Snow showers. Waves
building to 15 to 20 feet occasionally to 25 feet.
.THURSDAY...North gales to 45 knots backing northwest in the
afternoon. 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 gales to 35 knots diminishing to 20 to
30 knots in the afternoon. Snow showers. Waves subsiding to 4 to
7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots. Snow showers
likely in the evening, then a chance of snow showers after
midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...Southwest winds 10 to 20 knots backing south. Snow
showers. Waves subsiding to calm to 2 feet, then building to 1 to
3 feet.
.SUNDAY...Northwest winds 15 to 25 knots. Snow showers. Waves
building to 4 to 7 feet occasionally to 9 feet.

$$

LSZ261-260300-
MAFOR 2522/
Superior West...GALE WARNING IN EFFECT...11150 12157 14867 11857.
A chance of rain showers early this evening. Waves 6 to 10 feet
building to 12 to 16 feet tonight. Waves 12 to 17 feet subsiding
to 10 to 14 feet Wednesday.

Superior North Central...GALE WARNING IN EFFECT...11140 12157
12167 11177 11877 11867. Waves 5 to 8 feet building to 10 to 15
feet tonight. Waves 14 to 19 feet Wednesday.

Superior South Central...GALE WARNING IN EFFECT...12146 12156
11167 11177 11877 11867. Waves 3 to 5 feet building to 10 to 13
feet tonight. Waves 11 to 15 feet building to 13 to 18 feet
Wednesday.

Superior East...GALE WARNING IN EFFECT...12146 12256 11257 13157.
Waves 3 to 6 feet building to 8 to 11 feet tonight. Waves 9 to 12
feet Wednesday.

$$

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