160
FZUS63 KMQT 230900
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM EST Sun Nov 23 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 weakening 29.7 inch low continues tracking southeast from Ontario
towards the St. Lawrence Seaway today. As this occurs, 30.0 inch
ridging returns over Lake Superior and remains until early Monday
morning. A 29.7 inch low pressure then emanates out of the Canadian
Prairies today before bringing 29.8 inch troughing back over Lake
Superior Monday morning. Two 29.7 inch shortwave lows, one digging
through the Northern Plains and the other lifting from the Southern
Plains, phase with each other late Monday night into Tuesday over
the western Great Lakes. As the phased low slowly progresses into
the Upper Great Lakes Tuesday night into Wednesday, expect the low
to deepen to 29.4 inches over Lake Superior by Wednesday. This low
then continues to deepen to around 29.3 inches Wednesday night into
Thanksgiving as it lifts towards northern Quebec. Meanwhile, a 30.5
inch high pressure returns to the Plains on Thanksgiving. This
creates a strong pressure gradient over Lake Superior on
Thanksgiving before the pressure gradient slackens by Friday as the
high pressure moves into the Great Lakes region.


LSZ162-232100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 AM EST Sun Nov 23 2025 /300 AM CST Sun Nov 23 2025/

.EARLY THIS MORNING...West winds 15 to 25 knots. Waves 2 to
4 feet.
.TODAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots veering southwest by
midnight. Waves building to 1 to 3 feet.
.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots. A slight chance of
rain. Waves calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. A chance of rain in the morning, then
rain in the afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...Northeast winds 20 to 30 knots becoming north
gales to 35 knots after midnight. Rain in the evening. Snow.
Waves building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. Snow likely, then a chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ263-232100-
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 Sun Nov 23 2025

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. Waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 6 feet
occasionally to 8 feet.
.TODAY...West winds 15 to 25 knots diminishing to 10 to 20 knots
by late morning, then backing southwest by mid afternoon. Waves
subsiding to 1 to 3 feet.
.TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots
by midnight, then veering southwest late. Waves subsiding to calm
to 2 feet, then building to 2 to 4 feet.
.MONDAY...Southwest winds 10 to 20 knots veering west by late
morning, then diminishing to 5 to 15 knots by mid afternoon.
Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots. A slight chance of
rain. Waves calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. A chance of rain in the morning, then
rain likely in the afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...Northeast winds 20 to 30 knots becoming north
gales to 35 knots after midnight. Rain and snow. Waves building
to 8 to 11 feet occasionally to 14 feet.
.WEDNESDAY...North gales to 40 knots becoming northwest gales to
35 knots. Snow showers likely, then a chance of snow showers.
Waves building to 9 to 12 feet occasionally to 15 feet, then
subsiding to 6 to 9 feet occasionally to 11 feet.
.THURSDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. A chance of snow showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet.

$$

LSZ264-232100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 AM EST Sun Nov 23 2025

.EARLY THIS MORNING...Northwest winds to 30 knots with a few gale
force gusts to 35 knots possible. Waves 7 to 10 feet occasionally
to 13 feet.
.TODAY...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 1 to 3 feet.
.TONIGHT...Southwest winds 5 to 15 knots backing south by
midnight, then becoming southwest 10 to 20 knots late. Waves
subsiding to calm to 2 feet, then building to 2 to 4 feet.
.MONDAY...Southwest winds 10 to 20 knots veering west by late
morning, then becoming northwest 5 to 15 knots by mid afternoon.
Waves subsiding to 1 to 3 feet.
.MONDAY NIGHT...North winds 5 to 15 knots veering northeast after
midnight. A slight chance of rain after midnight. Waves subsiding
to calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. A chance of rain. Waves building to
2 to 4 feet.
.TUESDAY NIGHT...Northeast winds 20 to 30 knots increasing to
gales to 40 knots after midnight. Rain and snow. Waves building
to 8 to 11 feet occasionally to 14 feet.
.WEDNESDAY...North gales to 40 knots backing northwest. Snow,
then a chance of snow showers. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 8 to 11 feet
occasionally to 14 feet.
.THURSDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. A chance of snow showers. Waves subsiding to 3 to
6 feet occasionally to 8 feet.

$$

LSZ265-232100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 AM EST Sun Nov 23 2025

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

.EARLY THIS MORNING...Northwest gales to 40 knots. Waves 6 to
9 feet occasionally to 11 feet.
.TODAY...Northwest gales to 35 knots diminishing to 20 to
30 knots by late morning, then becoming west 10 to 20 knots by
mid afternoon. Waves subsiding to 1 to 3 feet.
.TONIGHT...Southwest winds 10 to 20 knots backing south by
midnight, then becoming southwest 15 to 25 knots late. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.MONDAY...Southwest winds 10 to 20 knots veering west by late
morning, then becoming northwest 5 to 15 knots by mid afternoon.
Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...North winds 5 to 15 knots veering northeast after
midnight. A chance of rain. Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots becoming east 10 to
20 knots in the afternoon. A chance of rain in the morning, then
rain likely in the afternoon. Waves building to 1 to 3 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots becoming northeast
gales to 35 knots after midnight. Rain. Snow after midnight.
Waves building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...Northwest gales to 40 knots. Rain. Snow showers.
Waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 8 to 11 feet occasionally to 14 feet.
.THURSDAY...Northwest gales to 40 knots diminishing to 20 to
30 knots. Snow showers likely, then a chance of snow showers.
Waves subsiding to 3 to 6 feet occasionally to 8 feet.

$$

LSZ266-232100-
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 Sun Nov 23 2025

...GALE WARNING IN EFFECT UNTIL 10 AM EST THIS MORNING...

.EARLY THIS MORNING...Northwest gales to 40 knots. Waves 9 to
12 feet occasionally to 15 feet building to 10 to 14 feet
occasionally to 18 feet.
.TODAY...Northwest gales to 35 knots diminishing to 20 to
30 knots by late morning, then becoming west 10 to 20 knots by
mid afternoon. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.TONIGHT...Southwest winds 10 to 20 knots backing south by
midnight, then increasing to 15 to 25 knots late. Waves subsiding
to 1 to 3 feet, then building to 2 to 4 feet.
.MONDAY...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then becoming west 5 to 15 knots by mid
afternoon. A slight chance of. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.MONDAY NIGHT...North winds 5 to 15 knots veering northeast after
midnight. A chance of rain. Waves subsiding to calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. A chance of rain in the morning, then rain in
the afternoon. Waves building to 1 to 3 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots increasing to gales to
35 knots after midnight. Rain. Snow after midnight. Waves
building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY...Northwest gales to 45 knots. Rain. Snow showers.
Waves building to 12 to 17 feet occasionally to 21 feet, then
subsiding to 10 to 14 feet occasionally to 18 feet.
.THURSDAY...Northwest gales to 35 knots. Snow showers. Waves
subsiding to 5 to 8 feet occasionally to 10 feet.

$$

LSZ267-232100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 AM EST Sun Nov 23 2025

...GALE WARNING IN EFFECT UNTIL 10 AM EST THIS MORNING...

.EARLY THIS MORNING...Northwest gales to 40 knots. A slight
chance of rain showers. Waves 9 to 12 feet occasionally to
15 feet building to 10 to 14 feet occasionally to 18 feet.
.TODAY...Northwest gales to 40 knots diminishing to 15 to
25 knots by mid afternoon. A slight chance of rain showers in the
morning. Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...West winds 10 to 20 knots backing southwest by
midnight, then becoming south 15 to 25 knots late. Waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.MONDAY...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.MONDAY NIGHT...Southwest winds 5 to 15 knots backing southeast
after midnight. A chance of rain in the evening, then rain likely
after midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots. Rain. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots becoming southeast
20 to 30 knots after midnight. Rain. Waves building to 3 to
6 feet occasionally to 8 feet.
.WEDNESDAY...Northwest gales to 35 knots. Rain. Snow showers.
Waves building to 10 to 14 feet occasionally to 18 feet.
.THURSDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. Snow showers. Waves subsiding to 9 to 12 feet
occasionally to 15 feet, then building to 10 to 14 feet
occasionally to 18 feet.

$$

LSZ261-231500-
MAFOR 2310/
Superior West 11630 12620 12510 11420 12520. Waves 3 to 5 feet
subsiding to 1 to 3 feet today. Waves 1 to 3 feet tonight.

Superior North Central 11750 11740 11730 12620 11510 11410 11420.
Waves 6 to 10 feet subsiding to 2 to 4 feet today. Waves 2 to 3
feet tonight.

Superior South Central...GALE WARNING IN EFFECT...11750 12740
11630 11610 11510 12420. Waves 7 to 11 feet subsiding to 3 to 5
feet today. Waves 2 to 4 feet subsiding to 1 to 3 feet tonight.

Superior East...GALE WARNING IN EFFECT...12750 12740 11620 12510
11420. Waves 9 to 13 feet subsiding to 5 to 8 feet today. Waves 3
to 6 feet subsiding to 2 to 3 feet tonight.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes