903
FZUS63 KMQT 092102
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
402 PM EST Sun Nov 9 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...

30.3 inch ridging was over Lake Superior this evening with a 30.7
inch high pressure over the Great Plains. The ridge weakens to 29.9
inches by Monday night ahead of a 29.4 inch trough that`s expected
to move across the lake Tuesday night into Wednesday. By Wednesday
night, the lake will be between 30.1 inch ridging over the Plains
and a deep 28.7 inch low east of Hudson Bay. Ridging builds to 30.1
inches over the lake on Thursday ahead of a 29.2 inch low moving
southeast along the northern Rockies.


LSZ162-100900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
402 PM EST Sun Nov 9 2025 /302 PM CST Sun Nov 9 2025/

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Isolated snow
showers. Waves 2 to 4 feet building to 3 to 5 feet occasionally
to 7 feet.
.TONIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. Isolated snow showers. Waves building to
3 to 6 feet occasionally to 8 feet, then subsiding to 2 to
4 feet.
.MONDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots by late morning, then backing west by mid afternoon.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to calm to 2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots backing southwest by
midnight, then increasing to 20 to 30 knots late. A slight chance
of snow showers after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...Southwest winds 20 to 30 knots becoming west 15 to
25 knots in the afternoon. A slight chance of snow showers in the
morning. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 2 to 4 feet.
.TUESDAY NIGHT...West winds 20 to 30 knots increasing to gales to
35 knots after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...Northwest gales to 35 knots becoming west 20 to
30 knots in the afternoon. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots becoming east 5 to
15 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots increasing to 15 to 25 knots.
Waves building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ263-100900-
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-
402 PM EST Sun Nov 9 2025

.LATE THIS AFTERNOON...North winds 15 to 25 knots. Scattered snow
showers. Waves 2 to 4 feet.
.TONIGHT...North winds 15 to 25 knots. Isolated snow showers.
Waves building to 3 to 6 feet occasionally to 8 feet.
.MONDAY...North winds 15 to 25 knots becoming northwest 5 to
15 knots by mid afternoon. Isolated snow showers in the morning.
Waves subsiding to 1 to 3 feet.
.MONDAY NIGHT...West winds 5 to 15 knots becoming southwest 10 to
20 knots by midnight, then increasing to 15 to 25 knots late.
Waves subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...Southwest winds 20 to 30 knots veering west in the
afternoon. A slight chance of rain and snow showers. Waves
building to 4 to 8 feet occasionally to 10 feet.
.TUESDAY NIGHT...West winds 20 to 30 knots increasing to gales to
35 knots after midnight. Waves building to 6 to 9 feet
occasionally to 11 feet.
.WEDNESDAY...Northwest gales to 35 knots. Waves building to 7 to
11 feet occasionally to 14 feet.
.WEDNESDAY NIGHT...West gales to 35 knots diminishing to 20 to
30 knots after midnight. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.THURSDAY...West winds 20 to 30 knots becoming northwest 10 to
20 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...East winds 15 to 25 knots becoming southeast 20 to
30 knots. Waves building to 5 to 8 feet occasionally to 10 feet.

$$

LSZ264-100900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
402 PM EST Sun Nov 9 2025

.LATE THIS AFTERNOON...North winds 10 to 20 knots. Isolated snow
showers. Waves 1 to 3 feet.
.TONIGHT...North winds 15 to 25 knots. Scattered snow showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.MONDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then becoming northwest 10 to 20 knots
by mid afternoon. Scattered snow showers in the morning. Waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 2 to 4 feet.
.MONDAY NIGHT...Northwest winds 5 to 15 knots backing west by
midnight, then becoming southwest 10 to 20 knots late. Waves
subsiding to calm to 2 feet, then building to 2 to 4 feet.
.TUESDAY...Southwest winds 20 to 30 knots veering west in the
afternoon. A chance of rain and snow showers. Waves building to
4 to 8 feet occasionally to 10 feet.
.TUESDAY NIGHT...West winds 20 to 30 knots becoming northwest
gales to 35 knots after midnight. A chance of rain showers. Waves
building to 7 to 10 feet occasionally to 13 feet.
.WEDNESDAY...Northwest gales to 40 knots. Waves building to 9 to
12 feet occasionally to 15 feet.
.WEDNESDAY NIGHT...Northwest gales to 35 knots becoming west
20 to 30 knots after midnight. Waves subsiding to 6 to 9 feet
occasionally to 11 feet.
.THURSDAY...West winds 20 to 30 knots becoming northwest 10 to
20 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...Southeast winds 15 to 25 knots increasing to gales to
35 knots. Waves building to 7 to 10 feet occasionally to 13 feet.

$$

LSZ265-100900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
402 PM EST Sun Nov 9 2025

.LATE THIS AFTERNOON...Northeast winds 15 to 25 knots. Numerous
snow showers. Waves 3 to 5 feet occasionally to 7 feet.
.TONIGHT...North winds 15 to 25 knots becoming northwest 20 to
30 knots late. Scattered snow showers in the evening, then snow
showers after midnight. Waves subsiding to 2 to 4 feet, then
building to 3 to 6 feet occasionally to 8 feet.
.MONDAY...North winds to 30 knots with a few gale force gusts to
35 knots possible diminishing to 20 to 30 knots by late morning,
then backing northwest by mid afternoon. Snow showers in the
morning, then scattered snow showers in the afternoon. Waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...Northwest winds 15 to 25 knots becoming west
10 to 20 knots by midnight, then backing southwest late. Waves
subsiding to calm to 2 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon. A chance of rain and snow showers.
Waves building to 2 to 4 feet.
.TUESDAY NIGHT...West winds 20 to 30 knots increasing to gales to
35 knots after midnight. Rain showers likely. Waves building to
5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...Northwest gales to 40 knots. A chance of rain
showers. Waves building to 7 to 10 feet occasionally to 13 feet.
.WEDNESDAY NIGHT...Northwest gales to 40 knots becoming west
gales to 35 knots after midnight. A chance of rain showers. Waves
subsiding to 5 to 8 feet occasionally to 10 feet.
.THURSDAY...West gales to 35 knots becoming northwest 10 to
20 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots. Waves building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ266-100900-
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-
402 PM EST Sun Nov 9 2025

.LATE THIS AFTERNOON...Northeast winds 15 to 25 knots. Isolated
snow showers. Waves 3 to 5 feet occasionally to 7 feet.
.TONIGHT...North winds 15 to 25 knots increasing to 20 to
30 knots late. Scattered snow showers. Waves subsiding to 2 to
4 feet, then building to 3 to 6 feet occasionally to 8 feet.
.MONDAY...North winds 20 to 30 knots. Numerous snow showers in
the morning, then scattered snow showers in the afternoon. Waves
building to 4 to 8 feet occasionally to 10 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots backing southwest
late. A slight chance of snow showers in the evening. Waves
subsiding to 1 to 3 feet.
.TUESDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A chance of snow showers in the
morning. A chance of rain showers. Snow showers likely in the
afternoon. Waves building to 4 to 7 feet occasionally to 9 feet.
.TUESDAY NIGHT...West winds 20 to 30 knots becoming northwest
gales to 35 knots after midnight. Rain showers. Waves building to
8 to 11 feet occasionally to 14 feet.
.WEDNESDAY...Northwest gales to 40 knots. Rain showers. Waves
building to 11 to 15 feet occasionally to 19 feet.
.WEDNESDAY NIGHT...Northwest gales to 40 knots. Rain showers
likely. Waves subsiding to 9 to 12 feet occasionally to 15 feet.
.THURSDAY...West winds 20 to 30 knots becoming northwest 15 to
25 knots. A chance of rain showers, possibly mixed with snow.
Waves subsiding to 2 to 4 feet.
.FRIDAY...East winds 15 to 25 knots becoming southeast gales to
35 knots. Waves subsiding to calm to 2 feet, then building to
7 to 10 feet occasionally to 13 feet.

$$

LSZ267-100900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
402 PM EST Sun Nov 9 2025

.LATE THIS AFTERNOON...Northeast winds 15 to 25 knots. Waves 2 to
4 feet.
.TONIGHT...Northeast winds 20 to 30 knots becoming north 15 to
25 knots by midnight. Scattered snow showers. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 1 to
3 feet.
.MONDAY...North winds 15 to 25 knots increasing to 20 to
30 knots. Scattered snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.MONDAY NIGHT...North winds 15 to 25 knots becoming northwest
10 to 20 knots by midnight, then backing west late. A slight
chance of snow showers. Waves subsiding to 1 to 3 feet.
.TUESDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A chance of snow showers, possibly
mixed with rain in the morning, then rain showers in the
afternoon. Waves building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...West winds 20 to 30 knots veering northwest
after midnight. Rain showers. Waves building to 8 to 11 feet
occasionally to 14 feet.
.WEDNESDAY...Northwest gales to 40 knots. Rain showers. Waves
building to 11 to 15 feet occasionally to 19 feet.
.WEDNESDAY NIGHT...Northwest gales to 40 knots. Rain showers.
Waves subsiding to 9 to 12 feet occasionally to 15 feet.
.THURSDAY...West gales to 35 knots becoming northwest 15 to
25 knots. Rain showers, possibly mixed with snow, then a chance
of rain showers, possibly mixed with snow. Waves subsiding to
2 to 4 feet.
.FRIDAY...East winds 10 to 20 knots becoming southeast 15 to
25 knots. A chance of rain showers. Waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ261-100300-
MAFOR 0922/
Superior West 15830 11720 11710. Waves 3 to 5 feet tonight. Waves
3 to 5 feet subsiding to 1 to 2 feet Monday.

Superior North Central 11820 11830 19837 11830 11737 12840 19847
11840 11830. Waves 2 to 3 feet building to 3 to 5 feet tonight.
Waves 5 to 8 feet subsiding to 3 to 6 feet Monday.

Superior South Central 11130 19137 11820 19827 12837 12847 11840
19847 11830 19837. Waves 2 to 4 feet building to 4 to 6 feet
tonight. Waves 5 to 8 feet Monday.

Superior East 11130 11830 11820 11820 19827 11837 13830 19837.
Waves 2 to 4 feet tonight. Waves 3 to 6 feet Monday.

$$

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