910
FZUS63 KMQT 220909 CCA
GLFLS

Open Lake Forecast for Lake Superior...CORRECTED
National Weather Service Marquette MI
409 AM EST Sat Nov 22 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...

Weak 30.0 inch ridging over the lake early this morning breaks down
today as a 29.8 inch trough moves over Lake Superior in the
afternoon and evening. 30.0 inch ridging follows Sunday into Monday.
Troughing of at least 29.7 inches begins to organize in the Plains
Monday, then moves into the Great Lakes Tuesday through Wednesday,
remaining in the vicinity Thursday.


LSZ162-222100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
409 AM EST Sat Nov 22 2025 /309 AM CST Sat Nov 22 2025/

.EARLY THIS MORNING...South winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...South winds 10 to 20 knots becoming southwest 15 to
25 knots by late morning, then veering west by mid afternoon. A
slight chance of snow showers in the morning. A slight chance of
rain showers. Waves building to 3 to 5 feet occasionally to
7 feet.
.TONIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. Waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing south in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Rain showers. Waves calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots becoming west 20 to
30 knots. Rain showers. A chance of snow showers. Waves building
to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...Northwest gales to 35 knots. A chance of snow
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.

$$

LSZ263-222100-
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-
409 AM EST Sat Nov 22 2025

.EARLY THIS MORNING...South winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...South winds 5 to 15 knots increasing to 10 to 20 knots
by late morning, then becoming west 15 to 25 knots by mid
afternoon. A chance of snow showers in the morning. A chance of
rain showers. Snow showers likely in the afternoon. Waves
building to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...West winds 15 to 25 knots veering northwest by
midnight. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots
by mid afternoon. Waves subsiding to 1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing south in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots. Rain showers
likely. Waves calm to 2 feet.
.TUESDAY...East winds 15 to 25 knots becoming west gales to
35 knots. Rain showers likely. A chance of snow showers. Waves
building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY...Northwest gales to 40 knots. Snow showers likely,
then a chance of snow showers. Waves building to 6 to 10 feet
occasionally to 13 feet.

$$

LSZ264-222100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
409 AM EST Sat Nov 22 2025

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...South winds 5 to 15 knots increasing to 10 to 20 knots
by late morning, then becoming southwest 15 to 25 knots by mid
afternoon. A chance of snow showers in the morning. A chance of
rain showers. Snow showers likely in the afternoon. Waves
building to 2 to 4 feet.
.TONIGHT...West winds 15 to 25 knots becoming northwest 20 to
30 knots by midnight. A chance of rain showers in the evening.
Waves building to 5 to 8 feet occasionally to 10 feet.
.SUNDAY...Northwest winds 20 to 30 knots becoming west 15 to
25 knots by late morning, then diminishing to 10 to 20 knots by
mid afternoon. Waves subsiding to 2 to 4 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing south in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots. A chance of rain
showers in the evening, then rain showers likely after midnight.
Waves building to 1 to 3 feet.
.TUESDAY...East winds 15 to 25 knots becoming northwest gales to
35 knots. Rain showers likely. A chance of snow showers. Waves
building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY...Northwest gales to 40 knots. Snow showers likely. A
chance of snow showers. Waves building to 7 to 10 feet
occasionally to 13 feet.

$$

LSZ265-222100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
409 AM EST Sat Nov 22 2025

.EARLY THIS MORNING...West winds 10 to 20 knots. Waves calm to
2 feet.
.TODAY...South winds 10 to 20 knots increasing to 20 to 30 knots.
A chance of rain showers, possibly mixed with snow. Waves
building to 2 to 4 feet.
.TONIGHT...West winds 20 to 30 knots increasing to 30 knots with
a few gale force gusts to 35 knots possible by midnight, then
veering northwest late. A slight chance of rain showers in the
evening. Waves subsiding to 1 to 3 feet, then building to 5 to
8 feet occasionally to 10 feet.
.SUNDAY...Northwest winds to 30 knots with a few gale force gusts
to 35 knots possible becoming west 20 to 30 knots by late
morning, then diminishing to 15 to 25 knots by mid afternoon.
Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 10 to 20 knots. Waves calm to
2 feet.
.MONDAY...Southwest winds 10 to 20 knots backing south in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots backing southeast
after midnight. Showers. Waves calm to 2 feet.
.TUESDAY...Southeast winds 15 to 25 knots becoming west gales to
40 knots. Rain showers. Snow showers likely. Waves building to
3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...West gales to 40 knots becoming northwest gales to
45 knots. Snow showers likely. Waves building to 6 to 9 feet
occasionally to 11 feet.

$$

LSZ266-222100-
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-
409 AM EST Sat Nov 22 2025

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves 1 to
3 feet.
.TODAY...Southwest winds 5 to 15 knots becoming south 15 to
25 knots by late morning, then increasing to 20 to 30 knots by
mid afternoon. A chance of snow and rain showers in the morning,
then rain showers, possibly mixed with snow in the afternoon.
Waves subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...Southwest winds 20 to 30 knots becoming northwest to
30 knots with a few gale force gusts to 35 knots possible by
midnight. A chance of rain showers. Waves building to 8 to
11 feet occasionally to 14 feet.
.SUNDAY...Northwest winds to 30 knots with a few gale force gusts
to 35 knots possible diminishing to 20 to 30 knots by late
morning, then becoming west 15 to 25 knots by mid afternoon. A
slight chance of rain showers in the morning. Waves subsiding to
3 to 6 feet occasionally to 8 feet.
.SUNDAY NIGHT...Southwest winds 10 to 20 knots. Waves subsiding
to 1 to 3 feet.
.MONDAY...South winds 10 to 20 knots. Waves 1 to 3 feet.
.MONDAY NIGHT...South winds 15 to 25 knots. A chance of rain
showers in the evening, then rain showers after midnight. Waves
1 to 3 feet.
.TUESDAY...Southeast winds 15 to 25 knots becoming west gales to
35 knots. Rain showers. Snow showers. Waves building to 6 to
9 feet occasionally to 11 feet.
.WEDNESDAY...West gales to 40 knots veering northwest. Snow
showers. Waves building to 10 to 14 feet occasionally to 18 feet,
then subsiding to 9 to 12 feet occasionally to 15 feet.

$$

LSZ267-222100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
409 AM EST Sat Nov 22 2025

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. A slight
chance of snow showers. Waves 1 to 3 feet.
.TODAY...West winds 10 to 20 knots backing southwest by late
morning, then becoming south 15 to 25 knots by mid afternoon.
Rain showers, possibly mixed with snow in the afternoon. Waves
subsiding to calm to 2 feet, then building to 2 to 4 feet.
.TONIGHT...Southwest winds 20 to 30 knots veering west by
midnight, then becoming northwest to 30 knots with a few gale
force gusts to 35 knots possible late. Rain showers likely in the
evening, then a slight chance of rain showers after midnight.
Waves building to 8 to 11 feet occasionally to 14 feet.
.SUNDAY...Northwest winds to 30 knots with a few gale force gusts
to 35 knots possible diminishing to 20 to 30 knots. A chance of
rain showers in the morning. Waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots backing southwest after
midnight. Waves subsiding to 1 to 3 feet.
.MONDAY...South winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. A chance of rain
showers in the evening, then rain showers after midnight. Waves
building to 1 to 3 feet.
.TUESDAY...Southeast winds 15 to 25 knots becoming south 20 to
30 knots. Rain showers. Snow showers. Waves building to 4 to
7 feet occasionally to 9 feet.
.WEDNESDAY...West gales to 40 knots. Rain showers. Snow showers.
Waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 9 to 12 feet occasionally to 15 feet.

$$

LSZ261-221500-
MAFOR 2210/
Superior West 11410 11420 11520 11530 13630 11730. Waves 1 to 3
feet building to 2 to 4 feet today. Waves 3 to 5 feet tonight.

Superior North Central 11600 11410 11427 11437 11530 11640 12740.
Waves 1 to 3 feet building to 2 to 4 feet today. Waves 2 to 4
feet building to 5 to 8 feet tonight.

Superior South Central 11600 11510 11420 11437 11530 11640 12740
19750. A chance of rain showers this afternoon and evening. Waves 1
to 3 feet building to 3 to 5 feet today. Waves 3 to 5 feet building
to 5 to 9 feet tonight.

Superior East 11710 11610 11520 11437 11436 11536 11640 11740.
Waves 2 to 4 feet today. Waves 3 to 6 feet building to 5 to 9
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