FZUS63 KMQT 230915
GLFLS

Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
415 AM EST Sun Nov 23 2025

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.

LSZ162-231500-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
415 AM EST Sun Nov 23 2025 /315 AM CST Sun Nov 23 2025/

.Today...
Weather.............Partly sunny.
Sfc winds...........Southwest 15 to 20 knots.
100-ft winds........Southwest 20 to 25 knots.
Sig waves...........3 to 5 feet subsiding to 2 to 4 feet in the
                              afternoon.
Ocnl waves..........Around 6 feet subsiding to around 5 feet in the
                              afternoon.

.TONIGHT...
Weather.............Mostly cloudy.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet after midnight.

.MONDAY...
Weather.............Mostly sunny.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet in the morning.

.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........North 5 to 10 knots.
100-ft winds........North 10 to 15 knots.
Sig waves...........2 to 4 feet.


.FORECAST DAYS 3 THROUGH 5...

.TUESDAY...Chance of rain in the morning. rain likely in the
afternoon, then rain and snow. Northeast winds 10 to 15 knots.
Waves 6 to 9 feet.
.WEDNESDAY...Windy. Rain and snow in the morning. snow showers in
the afternoon, then chance of snow showers. North winds to
30 knots. Waves 14 to 18 feet.
.THURSDAY...Breezy. Chance of snow showers. West winds 20 to
25 knots. Waves 12 to 16 feet.

$$

LSZ263-231500-
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-
415 AM EST Sun Nov 23 2025

.Today...
Weather.............Mostly sunny.
Sfc winds...........West 15 to 20 knots.
100-ft winds........West 20 to 25 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 8 feet.

.TONIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Southwest 15 to 20 knots.
100-ft winds........Southwest 20 to 25 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet.

.MONDAY...
Weather.............Mostly sunny.
Sfc winds...........Southwest 15 to 20 knots becoming west 5 to 10
                              knots in the afternoon.
100-ft winds........Southwest 20 to 25 knots becoming west 10 to 15
                              knots in the afternoon.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.

.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........North 10 to 15 knots.
100-ft winds........North 15 to 20 knots.
Sig waves...........2 to 4 feet.


.FORECAST DAYS 3 THROUGH 5...

.TUESDAY...Chance of rain in the morning. rain likely in the
afternoon, then rain and snow. Northeast winds 10 to 15 knots.
Waves 6 to 9 feet.
.WEDNESDAY...Windy. Rain and snow in the morning. snow showers in
the afternoon, then chance of snow showers. North winds to
30 knots. Waves 14 to 18 feet.
.THURSDAY...Breezy. Chance of snow showers. West winds 20 to
25 knots. Waves 12 to 16 feet.

$$

LSZ264-231500-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
415 AM EST Sun Nov 23 2025

.Today...
Weather.............Mostly sunny.
Sfc winds...........Northwest 20 to 25 knots becoming west 10 to 15
                              knots in the afternoon.
100-ft winds........Northwest to 30 knots becoming west 15 to 20
                              knots in the afternoon.
Sig waves...........8 to 12 feet subsiding to 5 to 7 feet in the
                              afternoon.
Ocnl waves..........Around 15 feet subsiding to around 9 feet in
                              the afternoon.

.TONIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 5 feet.

.MONDAY...
Weather.............Mostly sunny.
Sfc winds...........Southwest 15 to 20 knots becoming west 10 to 15
                              knots in the afternoon.
100-ft winds........Southwest 20 to 25 knots becoming west 15 to 20
                              knots in the afternoon.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.

.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........North 10 to 15 knots.
100-ft winds........North 15 to 20 knots.
Sig waves...........2 to 4 feet.


.FORECAST DAYS 3 THROUGH 5...

.TUESDAY...Chance of rain in the morning. rain likely in the
afternoon, then rain and snow. Northeast winds 10 to 15 knots.
Waves 6 to 9 feet.
.WEDNESDAY...Windy. Rain and snow in the morning. snow showers in
the afternoon, then chance of snow showers. North winds to
30 knots. Waves 14 to 18 feet.
.THURSDAY...Breezy. Chance of snow showers. West winds 20 to
25 knots. Waves 12 to 16 feet.

$$

LSZ265-231500-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
415 AM EST Sun Nov 23 2025

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

.Today...
Weather.............Mostly sunny.
Sfc winds...........Northwest to 30 knots becoming west 15 to 20
                              knots in the afternoon.
100-ft winds........Northwest gales to 35 knots becoming west 20 to
                              25 knots in the afternoon.
Sig waves...........8 to 12 feet subsiding to 5 to 7 feet in the
                              afternoon.
Ocnl waves..........Around 13 feet subsiding to around 9 feet in
                              the afternoon.

.TONIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Southwest 10 to 15 knots becoming south after
                              midnight.
100-ft winds........Southwest 15 to 20 knots becoming south after
                              midnight.
Sig waves...........2 to 4 feet.

.MONDAY...
Weather.............Partly sunny.
Sfc winds...........Southwest 15 to 20 knots becoming west 10 to 15
                              knots in the afternoon.
100-ft winds........Southwest 20 to 25 knots becoming west 15 to 20
                              knots in the afternoon.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet.

.MONDAY NIGHT...
Weather.............Cloudy, then chance of rain after midnight.
Sfc winds...........Light and variable winds.
100-ft winds........Light and variable winds.
Sig waves...........1 to 3 feet.


.FORECAST DAYS 3 THROUGH 5...

.TUESDAY...Chance of rain in the morning. rain likely in the
afternoon, then rain and snow. Northeast winds 10 to 15 knots.
Waves 6 to 9 feet.
.WEDNESDAY...Windy. Rain and snow in the morning. snow showers in
the afternoon, then chance of snow showers. North winds to
30 knots. Waves 14 to 18 feet.
.THURSDAY...Breezy. Chance of snow showers. West winds 20 to
25 knots. Waves 12 to 16 feet.

$$

LSZ266-231500-
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-
415 AM EST Sun Nov 23 2025

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

.Today...
Weather.............Partly sunny.
Sfc winds...........Northwest to 30 knots decreasing to 15 to 20
                              knots in the afternoon.
100-ft winds........Northwest gales to 35 knots decreasing to 20 to
                              25 knots in the afternoon.
Sig waves...........10 to 14 feet.
Ocnl waves..........Around 18 feet.

.TONIGHT...
Weather.............Mostly cloudy.
Sfc winds...........West 10 to 15 knots becoming southwest 15 to 20
                              knots after midnight.
100-ft winds........West 15 to 20 knots becoming southwest 20 to 25
                              knots after midnight.
Sig waves...........5 to 7 feet subsiding to 3 to 5 feet after
                              midnight.
Ocnl waves..........Around 9 feet subsiding to around 6 feet after
                              midnight.

.MONDAY...
Weather.............Partly sunny.
Sfc winds...........Southwest 15 to 20 knots.
100-ft winds........Southwest 20 to 25 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 8 feet.

.MONDAY NIGHT...
Weather.............Mostly cloudy with chance of rain.
Sfc winds...........North 5 to 10 knots.
100-ft winds........North 10 to 15 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet in the evening.


.FORECAST DAYS 3 THROUGH 5...

.TUESDAY...Chance of rain in the morning. rain likely in the
afternoon, then rain and snow. Northeast winds 10 to 15 knots.
Waves 6 to 9 feet.
.WEDNESDAY...Windy. Rain and snow in the morning. snow showers in
the afternoon, then chance of snow showers. North winds to
30 knots. Waves 14 to 18 feet.
.THURSDAY...Breezy. Chance of snow showers. West winds 20 to
25 knots. Waves 12 to 16 feet.

$$

LSZ267-231500-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
415 AM EST Sun Nov 23 2025

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

.Today...
Weather.............Cloudy with a slight chance of showers, then
                              partly sunny in the afternoon.
Sfc winds...........Northwest gales to 35 knots decreasing to 20 to
                              25 knots in the afternoon.
100-ft winds........Northwest gales to 45 knots decreasing to 30
                              knots in the afternoon.
Sig waves...........12 to 16 feet.
Ocnl waves..........Around 19 feet.

.TONIGHT...
Weather.............Mostly cloudy.
Sfc winds...........West 10 to 15 knots becoming southwest after
                              midnight.
100-ft winds........West 15 to 20 knots becoming southwest after
                              midnight.
Sig waves...........6 to 9 feet subsiding to 3 to 5 feet after
                              midnight.
Ocnl waves..........Around 10 feet subsiding to around 6 feet after
                              midnight.

.MONDAY...
Weather.............Partly sunny.
Sfc winds...........South 20 to 25 knots becoming southwest 10 to
                              15 knots in the afternoon.
100-ft winds........South to 30 knots becoming southwest 15 to 20
                              knots in the afternoon.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 8 feet.

.MONDAY NIGHT...
Weather.............Mostly cloudy with chance of rain, then cloudy
                              with rain likely after midnight.
Sfc winds...........Southwest 5 to 10 knots becoming south after
                              midnight.
100-ft winds........Southwest 10 to 15 knots becoming south after
                              midnight.
Sig waves...........2 to 4 feet.


.FORECAST DAYS 3 THROUGH 5...

.TUESDAY...Chance of rain in the morning. rain likely in the
afternoon, then rain and snow. Northeast winds 10 to 15 knots.
Waves 6 to 9 feet.
.WEDNESDAY...Windy. Rain and snow in the morning. snow showers in
the afternoon, then chance of snow showers. North winds to
30 knots. Waves 14 to 18 feet.
.THURSDAY...Breezy. Chance of snow showers. West winds 20 to
25 knots. Waves 12 to 16 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.

$$

Occasional waves will only be displayed when values meet or exceed 5 feet.

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