990
FZUS63 KMQT 290900
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM EST Sat Nov 29 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 29.8 inch low near the Oklahoma Panhandle early this morning will
maintain its intensity as it tracks to Lower Michigan by Sunday
morning and then into southern Quebec by Sunday evening, sending a
30.0 inch trough over the eastern half of Lake Superior on Sunday.
In its wake, 30.6 inch high pressure moves over the Upper Midwest,
sliding south of the Great Lakes at 30.5 inches on Monday. The high
will weaken Tuesday into Wednesday as 29.7 inch low pressure moves
across Ontario and a 29.5 inch Nor`Easter develops over the Mid
Atlantic. A 30.4 inch high will build into the central Plains on
Wednesday night into Thursday, extending a 30.2 inch ridge over Lake
Superior.


LSZ162-292100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 AM EST Sat Nov 29 2025 /300 AM CST Sat Nov 29 2025/

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

$$

LSZ263-292100-
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 Sat Nov 29 2025

.EARLY THIS MORNING...North winds 5 to 15 knots. A chance of snow
showers. Waves calm to 2 feet.
.TODAY...North winds 5 to 15 knots veering northeast by late
morning, then increasing to 10 to 20 knots by mid afternoon. A
chance of snow showers. Waves building to 1 to 3 feet.
.TONIGHT...Northeast winds 15 to 25 knots increasing to 20 to
30 knots by midnight, then backing north late. Snow showers in
the evening, then a chance of snow showers after midnight. Waves
building to 6 to 9 feet occasionally to 11 feet.
.SUNDAY...North winds to 30 knots with a few gale force gusts to
35 knots possible becoming northwest 20 to 30 knots. A chance of
snow showers. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots backing west after
midnight. Waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet.
.MONDAY...West gales to 35 knots backing southwest in the
afternoon. Waves building to 6 to 10 feet occasionally to
13 feet.
.MONDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots. A chance of snow showers. Waves subsiding to 2 to
4 feet, then building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...Northwest gales to 35 knots. A chance of snow
showers. Freezing spray. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ264-292100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 AM EST Sat Nov 29 2025

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. A slight
chance of snow showers. Waves calm to 2 feet.
.TODAY...North winds 5 to 15 knots veering northeast by mid
afternoon. A slight chance of snow showers. Waves calm to 2 feet.
.TONIGHT...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by midnight, then becoming north 20 to 30 knots late.
Snow showers likely in the evening, then a chance of snow showers
after midnight. Waves building to 5 to 8 feet occasionally to
10 feet.
.SUNDAY...North winds to 30 knots with a few gale force gusts to
35 knots possible backing northwest by late morning, then
diminishing to 20 to 30 knots by mid afternoon. A chance of snow
showers. Waves building to 6 to 10 feet occasionally to 13 feet.
.SUNDAY NIGHT...Northwest winds 20 to 30 knots becoming west
15 to 25 knots after midnight. A slight chance of snow showers in
the evening. Waves subsiding to 2 to 4 feet, then building to
3 to 5 feet occasionally to 7 feet.
.MONDAY...West gales to 35 knots. A chance of snow showers. Waves
building to 7 to 10 feet occasionally to 13 feet.
.MONDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. A chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...West winds 10 to 20 knots increasing to 15 to
25 knots. A chance of snow showers. Waves subsiding to 2 to
4 feet, then building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...Northwest gales to 35 knots. Freezing spray. A
chance of snow showers. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.

$$

LSZ265-292100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 AM EST Sat Nov 29 2025

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. A slight
chance of snow showers. Waves 1 to 3 feet subsiding to calm to
2 feet.
.TODAY...Northwest winds 5 to 15 knots veering north by late
morning, then becoming east 10 to 20 knots by mid afternoon. A
chance of snow showers. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots increasing to 15 to 25 knots
by midnight, then becoming northeast 20 to 30 knots late. Snow
showers. Waves building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...North winds to 30 knots with a few gale force gusts to
35 knots possible becoming northwest to 30 knots with a few gale
force gusts to 40 knots possible. Snow showers. Waves building to
7 to 11 feet occasionally to 14 feet.
.SUNDAY NIGHT...Northwest gales to 35 knots becoming west 15 to
25 knots after midnight. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.MONDAY...Southwest winds 20 to 30 knots. A chance of snow
showers. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.MONDAY NIGHT...West winds 20 to 30 knots. A chance of snow
showers. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.TUESDAY...West winds 15 to 25 knots. Snow showers likely. Waves
subsiding to calm to 2 feet, then building to 2 to 4 feet.
.WEDNESDAY...Northwest gales to 40 knots. Snow showers likely,
then a chance of snow showers. Freezing spray. Waves building to
7 to 10 feet occasionally to 13 feet, then subsiding to 3 to
6 feet occasionally to 8 feet.

$$

LSZ266-292100-
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 Sat Nov 29 2025

.EARLY THIS MORNING...North winds 10 to 20 knots. A chance of
snow showers. Waves 2 to 4 feet.
.TODAY...North winds 5 to 15 knots veering east by mid afternoon.
A chance of snow showers. Waves subsiding to calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots increasing to 15 to 25 knots
by midnight, then backing northeast late. Snow showers. Waves
building to 4 to 7 feet occasionally to 9 feet.
.SUNDAY...North winds to 30 knots with a few gale force gusts to
35 knots possible becoming northwest to 30 knots with a few gale
force gusts to 40 knots possible by mid afternoon. Snow showers.
Waves building to 10 to 14 feet occasionally to 18 feet.
.SUNDAY NIGHT...Northwest gales to 35 knots becoming west 15 to
25 knots after midnight. Snow showers in the evening, then a
chance of snow showers after midnight. Waves subsiding to 3 to
6 feet occasionally to 8 feet.
.MONDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A chance of snow showers. Waves
building to 7 to 10 feet occasionally to 13 feet.
.MONDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. A chance of snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...West winds 15 to 25 knots backing southwest. A chance
of snow showers. Waves subsiding to 2 to 4 feet, then building to
3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...Northwest gales to 40 knots. Freezing spray. Snow
showers. Waves building to 10 to 14 feet occasionally to 18 feet,
then subsiding to 7 to 10 feet occasionally to 13 feet.

$$

LSZ267-292100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 AM EST Sat Nov 29 2025

.EARLY THIS MORNING...North winds 10 to 20 knots. A slight chance
of snow showers. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.TODAY...East winds 10 to 20 knots veering southeast. A chance of
snow showers. Waves subsiding to calm to 2 feet.
.TONIGHT...Southeast winds 15 to 25 knots backing east by
midnight, then increasing to 20 to 30 knots late. Snow showers.
Waves building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northeast winds 20 to 30 knots becoming north to
30 knots with a few gale force gusts to 35 knots possible by late
morning, then backing northwest by mid afternoon. Snow showers.
Waves building to 9 to 12 feet occasionally to 15 feet.
.SUNDAY NIGHT...Northwest gales to 35 knots becoming west 15 to
25 knots after midnight. Snow showers. Waves subsiding to 3 to
6 feet occasionally to 8 feet.
.MONDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. Snow showers likely in the morning,
then a chance of snow showers in the afternoon. Waves building to
4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots veering west after
midnight. A chance of snow showers in the evening, then snow
showers likely after midnight. Waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 4 to 7 feet occasionally
to 9 feet.
.TUESDAY...West winds 15 to 25 knots backing southwest. Snow
showers likely. Waves subsiding to 2 to 4 feet, then building to
3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...Northwest gales to 35 knots. Snow showers. Freezing
spray. Waves building to 10 to 14 feet occasionally to 18 feet,
then subsiding to 7 to 10 feet occasionally to 13 feet.

$$

LSZ261-291500-
MAFOR 2910/
Superior West 11100 12110 11120 12137 11147 11840. Waves 2 feet
or less building to 2 to 3 feet today. Waves 2 to 4 feet building
to 4 to 7 feet tonight.

Superior North Central 11700 12800 12110 11120 11137 11140. Waves
1 to 2 feet today. Waves 1 to 3 feet building to 3 to 6 feet
tonight.

Superior South Central 11710 11700 11800 11117 11210 12227 11127.
Waves 1 to 3 feet subsiding to 1 foot or less today. Waves 1 to 3
feet building to 2 to 4 feet tonight.

Superior East 11800 11110 12310 11320 11327 11337 11237. Waves 1
to 3 feet today. Waves 1 to 3 feet building to 3 to 5 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