231
FZUS63 KMQT 030902
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 AM EST Mon Nov 3 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...

29.1 inch low pressure is moving over Hudson Bay early this morning,
pulling a 29.6 inch trough across Lake Superior. A 30.0 inch ridge
then rebuilds over the lake tonight into Tuesday associated with a
30.4 inch high pressure over the Southeastern U.S. A 29.8 inch low
then moves over Lake Michigan Tuesday night, followed by a 30.2 inch
high pressure moving from the Northern Plains towards the Mid-
Atlantic Wednesday night into Thursday. Afterwards, a 29.4 inch low
then moves through the Great Lakes region Thursday night and Friday.


LSZ162-032100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 AM EST Mon Nov 3 2025 /301 AM CST Mon Nov 3 2025/

...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON...

.EARLY THIS MORNING...West gales to 35 knots. Waves 6 to 9 feet
occasionally to 11 feet.
.TODAY...West gales to 40 knots diminishing to 20 to 30 knots by
mid afternoon. Waves building to 7 to 10 feet occasionally to
13 feet, then subsiding to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...West winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots backing southwest by late
morning, then becoming south 5 to 15 knots by mid afternoon.
Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots becoming north
10 to 20 knots after midnight. A chance of rain showers. Waves
calm to 2 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots. Waves building to
1 to 3 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots backing west
after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. A chance of rain showers. Waves building to 1 to
3 feet.
.FRIDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots. A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to calm to 2 feet.

$$

LSZ263-032100-
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-
401 AM EST Mon Nov 3 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.EARLY THIS MORNING...West gales to 40 knots. Waves 9 to 12 feet
occasionally to 15 feet.
.TODAY...West gales to 40 knots. Waves subsiding to 8 to 11 feet
occasionally to 14 feet.
.TONIGHT...West gales to 35 knots diminishing to 15 to 25 knots.
Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...West winds 15 to 25 knots backing southwest by late
morning, then diminishing to 10 to 20 knots by mid afternoon.
Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots backing north after
midnight. A chance of rain showers. Waves subsiding to calm to
2 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...South winds 15 to 25 knots. A chance of rain showers.
Waves building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...North gales to 35 knots diminishing to 20 to 30 knots.
A chance of rain showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to calm to 2 feet.

$$

LSZ264-032100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 AM EST Mon Nov 3 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.EARLY THIS MORNING...West gales to 40 knots. Waves 9 to 12 feet
occasionally to 15 feet.
.TODAY...West gales to 40 knots. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 8 to 11 feet
occasionally to 14 feet.
.TONIGHT...West gales to 35 knots diminishing to 15 to 25 knots.
Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...West winds 15 to 25 knots backing southwest by mid
afternoon. Waves subsiding to 2 to 4 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots veering northwest
after midnight. A slight chance of rain showers. Waves subsiding
to calm to 2 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots. Waves building to
3 to 6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...Southwest winds 15 to 25 knots backing south. Rain
showers likely. Waves subsiding to calm to 2 feet, then building
to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...North gales to 35 knots diminishing to 20 to 30 knots.
A chance of rain showers. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 1 to 3 feet.

$$

LSZ265-032100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 AM EST Mon Nov 3 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.EARLY THIS MORNING...West gales to 40 knots. A slight chance of
showers. Waves 6 to 9 feet occasionally to 11 feet building to
7 to 10 feet occasionally to 13 feet.
.TODAY...West gales to 45 knots. A slight chance of showers in
the morning. Waves building to 8 to 11 feet occasionally to
14 feet, then subsiding to 6 to 9 feet occasionally to 11 feet.
.TONIGHT...West gales to 40 knots diminishing to 20 to 30 knots
late. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots veering northwest
after midnight. A chance of showers. Waves calm to 2 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots increasing to gales
to 35 knots in the afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...South winds 20 to 30 knots. Rain showers. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.FRIDAY...North gales to 35 knots. Rain showers likely. A chance
of snow showers. Waves building to 6 to 9 feet occasionally to
11 feet, then subsiding to 2 to 4 feet.

$$

LSZ266-032100-
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-
401 AM EST Mon Nov 3 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.EARLY THIS MORNING...West gales to 40 knots. A slight chance of
showers. Waves 10 to 14 feet occasionally to 18 feet.
.TODAY...West gales to 40 knots. A slight chance of showers in
the morning. Waves building to 12 to 17 feet occasionally to
21 feet, then subsiding to 10 to 14 feet occasionally to 18 feet.
.TONIGHT...West gales to 40 knots diminishing to 20 to 30 knots
late. Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.TUESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves subsiding to 2 to 4 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots becoming
northwest 5 to 15 knots after midnight. A chance of showers in
the evening, then showers likely after midnight. Waves subsiding
to calm to 2 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots increasing to gales
to 35 knots in the afternoon. A chance of showers. Waves building
to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY NIGHT...Northwest gales to 35 knots diminishing to
10 to 20 knots after midnight. A chance of rain showers in the
evening. Waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Southwest winds 20 to 30 knots becoming south gales
to 35 knots. A chance of rain showers, then rain showers. Waves
subsiding to 1 to 3 feet, then building to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY...North gales to 35 knots. Rain showers likely. A chance
of snow showers. A chance of rain showers. Waves building to 7 to
10 feet occasionally to 13 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ267-032100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 AM EST Mon Nov 3 2025

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.EARLY THIS MORNING...West gales to 40 knots. Showers likely.
Waves 10 to 14 feet occasionally to 18 feet.
.TODAY...West gales to 45 knots. A chance of showers in the
morning. Waves building to 12 to 17 feet occasionally to 21 feet.
.TONIGHT...West gales to 40 knots becoming northwest gales to
35 knots by midnight, then becoming west 20 to 30 knots late. A
slight chance of showers in the evening. Waves subsiding to 7 to
10 feet occasionally to 13 feet.
.TUESDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots backing south
after midnight. A chance of showers in the evening, then showers
likely after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. Showers likely in the morning, then a
chance of showers in the afternoon. Waves building to 6 to 9 feet
occasionally to 11 feet.
.WEDNESDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
10 to 20 knots after midnight. A chance of rain showers in the
evening. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Southwest winds 15 to 25 knots becoming south 20 to
30 knots. A chance of rain showers, then rain showers. Waves
subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots. Rain showers. A chance of snow showers. A chance of
rain showers. Waves building to 5 to 8 feet occasionally to
10 feet, then subsiding to 3 to 5 feet occasionally to 7 feet.

$$

LSZ261-031500-
MAFOR 0310/
Superior West...GALE WARNING IN EFFECT...14650 13640 11630. Waves
omitted due to the lake being mostly ice covered.

Superior North Central...GALE WARNING IN EFFECT...15650 12640.
Waves omitted due to the lake being mostly ice covered.

Superior South Central...GALE WARNING IN EFFECT...13660 14650
11640. Waves omitted due to the lake being mostly ice covered.

Superior East...GALE WARNING IN EFFECT...12650 12660 12650 11750
11740. A chance of showers this morning. Waves omitted due to the
lake being mostly ice covered.

$$

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