252
FZUS63 KMQT 011501
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EST Mon Dec 1 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 30.4 inch high over the Lower Great Lakes this morning moves to
New England by this evening while a weak 30.0 inch trough descends
over Lake Superior from northern Ontario. As the trough deepens to
29.9 inches on Tuesday, a 29.7 inch low dives through southern
Saskatchewan into the Northern Plains. The low weakens slightly to
29.8 inches Tuesday evening as it approaches Lake Superior. By
Wednesday afternoon, the low deepens to 29.6 inches south of James
Bay while a 30.5 inch high builds over the High Plains. The high
shifts over the Central Plains Thursday morning before moving
between the Great Lakes and Ohio River Valley Thursday evening. The
high arrives over the Mid-Atlantic states on Friday as troughing
down to 29.7 inches develops over Lake Superior.


LSZ162-012100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EST Mon Dec 1 2025 /900 AM CST Mon Dec 1 2025/

.REST OF TODAY...West winds 15 to 25 knots backing southwest. A
chance of snow showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots by midnight. A chance of snow showers. Waves subsiding
to 1 to 3 feet.
.TUESDAY...West winds 10 to 20 knots becoming southwest 15 to
25 knots. A slight chance of snow showers. Waves subsiding to
calm to 2 feet, then building to 3 to 5 feet occasionally to
7 feet.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots veering west
after midnight. Snow showers likely. Waves subsiding to 2 to
4 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots. A slight chance of
snow showers in the morning. Waves building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots. Waves
subsiding to 1 to 3 feet.
.THURSDAY...Southwest winds 20 to 30 knots. A chance of snow
showers. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet.
.FRIDAY...West winds 10 to 20 knots veering northwest. A chance
of snow showers. Waves subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-012100-
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-
1000 AM EST Mon Dec 1 2025

.REST OF TODAY...Southwest winds 20 to 30 knots. A chance of snow
showers. Waves 4 to 8 feet occasionally to 10 feet.
.TONIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots by midnight. A chance of snow showers in the evening.
Snow showers likely after midnight. Waves subsiding to 2 to
4 feet.
.TUESDAY...West winds 10 to 20 knots becoming southwest 15 to
25 knots. A chance of snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY NIGHT...Southwest winds 20 to 30 knots becoming west
15 to 25 knots after midnight. Snow showers likely. Waves
building to 4 to 7 feet occasionally to 9 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots increasing to gales
to 35 knots in the afternoon. A chance of snow showers. Freezing
spray in the afternoon. Waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 5 to 8 feet occasionally
to 10 feet.
.WEDNESDAY NIGHT...Northwest gales to 35 knots diminishing to
20 to 30 knots after midnight. Freezing spray. Waves subsiding to
3 to 6 feet occasionally to 8 feet.
.THURSDAY...West winds 20 to 30 knots becoming southwest gales to
35 knots. A chance of snow showers. Freezing spray. Waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
5 to 8 feet occasionally to 10 feet.
.FRIDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. A chance of snow showers. Waves subsiding to 2 to
4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-012100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 AM EST Mon Dec 1 2025

.REST OF TODAY...West winds 20 to 30 knots. Snow showers likely
late in the morning, then a chance of snow showers in the
afternoon. Waves 4 to 8 feet occasionally to 10 feet.
.TONIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots by midnight, then veering northwest late. Snow showers
likely. Waves subsiding to 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots becoming southwest 15 to
25 knots. A chance of snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots becoming west
20 to 30 knots after midnight. Snow showers. Waves building to
5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots increasing to gales
to 35 knots in the afternoon. Freezing spray. A chance of snow
showers. Waves building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY NIGHT...Northwest gales to 35 knots diminishing to
20 to 30 knots after midnight. Freezing spray. A chance of snow
showers. Waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 5 to 8 feet occasionally to 10 feet.
.THURSDAY...West winds 20 to 30 knots backing southwest. Freezing
spray. Snow showers likely. Waves subsiding to 3 to 5 feet
occasionally to 7 feet, then building to 6 to 9 feet occasionally
to 11 feet.
.FRIDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. A chance of snow showers. Waves subsiding to 2 to
4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-012100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EST Mon Dec 1 2025

.REST OF TODAY...Southwest winds 20 to 30 knots veering west by
mid afternoon. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. A slight chance of snow showers after
midnight. Waves subsiding to 2 to 4 feet.
.TUESDAY...West winds 15 to 25 knots backing southwest. A slight
chance of snow showers in the morning. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...Southwest winds 20 to 30 knots veering west
after midnight. A chance of snow showers in the evening, then
snow showers after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots increasing to gales
to 35 knots in the afternoon. Snow showers. Freezing spray in the
afternoon. Waves building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY NIGHT...Northwest gales to 40 knots. Freezing spray.
Snow showers likely in the evening. A chance of snow showers
after midnight. Waves subsiding to 5 to 8 feet occasionally to
10 feet.
.THURSDAY...West winds 20 to 30 knots backing southwest. Freezing
spray. A chance of snow showers, then snow showers likely. Waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...Southwest winds 15 to 25 knots veering west. A chance
of snow showers. Waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-012100-
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-
1000 AM EST Mon Dec 1 2025

.REST OF TODAY...Southwest winds 20 to 30 knots diminishing to
15 to 25 knots by mid afternoon. A slight chance of snow showers.
Waves 3 to 6 feet occasionally to 8 feet building to 5 to 8 feet
occasionally to 10 feet.
.TONIGHT...West winds 15 to 25 knots. A chance of snow showers.
Waves subsiding to 3 to 5 feet occasionally to 7 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 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. A chance of snow showers in the
evening, then snow showers after midnight. Waves building to 5 to
8 feet occasionally to 10 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots increasing to gales
to 35 knots in the afternoon. Snow showers. Freezing spray in the
afternoon. Waves building to 9 to 12 feet occasionally to
15 feet.
.WEDNESDAY NIGHT...Northwest gales to 35 knots. Freezing spray.
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 winds 20 to 30 knots backing southwest.
Freezing spray. A chance of snow showers. Snow showers likely.
Waves subsiding to 4 to 7 feet occasionally to 9 feet, then
building to 6 to 9 feet occasionally to 11 feet.
.FRIDAY...Southwest winds 15 to 25 knots veering west. A chance
of snow showers, then snow showers likely. Waves subsiding to
3 to 5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-012100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EST Mon Dec 1 2025

.REST OF TODAY...Southwest winds 20 to 30 knots. A slight chance
of snow showers. Waves 3 to 6 feet occasionally to 8 feet
building to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...Southwest winds 20 to 30 knots becoming west 15 to
25 knots by midnight. A chance of snow showers. Waves subsiding
to 2 to 4 feet.
.TUESDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of snow showers. Waves 2 to
4 feet.
.TUESDAY NIGHT...Southwest winds 20 to 30 knots. A chance of snow
showers in the evening, then snow showers after midnight. Waves
building to 4 to 7 feet occasionally to 9 feet.
.WEDNESDAY...West winds 20 to 30 knots becoming northwest gales
to 35 knots in the afternoon. Snow showers. Waves building to
8 to 11 feet occasionally to 14 feet.
.WEDNESDAY NIGHT...Northwest gales to 35 knots diminishing to
20 to 30 knots after midnight. Freezing spray. Snow showers.
Waves building to 8 to 12 feet occasionally to 15 feet.
.THURSDAY...Northwest winds 15 to 25 knots becoming southwest
20 to 30 knots. Freezing spray. Snow showers. Waves subsiding to
4 to 8 feet occasionally to 10 feet.
.FRIDAY...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots. Snow showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-012100-
MAFOR 0116/
Superior West 13540 11530 12620 11610 11520. A chance of snow
showers. Waves 4 to 7 feet this afternoon. Waves 3 to 6 feet
subsiding to 2 to 4 feet tonight. Waves 1 to 3 feet Tuesday
morning.

Superior North Central 12647 11640 12637 11727 12620. Waves 5 to
8 feet this afternoon. Waves 5 to 8 feet subsiding to 3 to 6 feet
tonight. Waves 2 to 4 feet Tuesday morning.

Superior South Central 11540 14630 11630 11620 11520. Waves 3 to
6 feet this afternoon. Waves 3 to 5 feet subsiding to 2 to 4 feet
tonight. Waves 2 to 4 feet subsiding to 1 to 3 feet Tuesday
morning.

Superior East 11540 11530 14630 12620. A chance of snow showers
Tuesday morning. Waves 4 to 7 feet this afternoon. Waves 4 to 7
feet subsiding to 3 to 5 feet tonight. Waves 3 to 5 feet Tuesday
morning.

$$

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