794
FZUS63 KMQT 292101
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM 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 29.9 inch low over Missouri this evening will deepen slightly to
29.8 inches over southern Michigan overnight tonight into Sunday
morning. The low will reach Georgian Bay at 29.7 inches Sunday
afternoon while 30.6 inch high pressure expands over the Northern
Plains. As the low quickly moves to the mouth of the St Lawrence
River Monday morning, the high will weaken slightly to 30.5 inches
just southwest of the Great Lakes. This high weakens to 30.3 inches
over the Lower Great Lakes Monday evening while a weak 30.0 inch
trough descends over the lake from northern Ontario. After the
trough briefly deepens to 29.9 inches, a weak 30.0 inch ridge moves
over the lake Tuesday morning as a 29.7 inch Clipper Low forms over
Saskatchewan. The low weakens slightly to 29.8 inches Tuesday
evening as it approaches Lake Superior. By Wednesday afternoon, the
low will deepen to 29.6 inches south of James Bay while a 30.5 inch
high builds over the High Plains. As the low departs to the east,
the high shifts over the Central Plains Thursday morning, moving
south of the Great Lakes Thursday evening.


LSZ162-300900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EST Sat Nov 29 2025 /300 PM CST Sat Nov 29 2025/

.LATE THIS AFTERNOON...Northeast winds 15 to 25 knots. A chance
of snow showers. Waves 1 to 3 feet building to 2 to 4 feet.
.TONIGHT...Northeast winds 15 to 25 knots increasing to 20 to
30 knots by midnight, then backing north late. A chance of snow
showers. Waves building to 6 to 9 feet occasionally to 11 feet.
.SUNDAY...North winds 15 to 25 knots backing northwest. Waves
subsiding to 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots backing west by
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. A slight chance of snow showers in the afternoon.
Waves building 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...West winds 10 to 20 knots backing southwest in the
afternoon. Waves building to 1 to 3 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots veering northwest
after midnight. A chance of snow showers. Waves 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.
.THURSDAY...Southwest winds 20 to 30 knots becoming west 15 to
25 knots. A chance of snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ263-300900-
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 PM EST Sat Nov 29 2025

.LATE THIS AFTERNOON...East winds 10 to 20 knots. A chance of
snow showers. Waves calm to 2 feet 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. A chance of snow
showers. Waves building to 6 to 9 feet occasionally to 11 feet.
.SUNDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots by mid afternoon. A slight chance of snow showers in the
morning. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots backing west by
midnight, then increasing to 15 to 25 knots late. Waves subsiding
to 1 to 3 feet, then building to 3 to 5 feet occasionally to
7 feet.
.MONDAY...West winds 20 to 30 knots becoming southwest gales to
35 knots in the afternoon. A slight chance of snow showers. Waves
building to 6 to 9 feet occasionally to 11 feet.
.MONDAY NIGHT...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 10 to 20 knots backing southwest in the
afternoon. Waves subsiding to 2 to 4 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots increasing to 20 to
30 knots after midnight. A chance of snow showers in the evening,
then snow showers likely after midnight. Waves building to 3 to
6 feet occasionally to 8 feet.
.WEDNESDAY...Northwest winds 20 to 30 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.
.THURSDAY...West winds 20 to 30 knots. Freezing spray. A chance
of snow showers. Waves building to 5 to 8 feet occasionally to
10 feet.

$$

LSZ264-300900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EST Sat Nov 29 2025

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. A slight
chance of snow showers. Waves calm to 2 feet.
.TONIGHT...Northeast winds 10 to 20 knots increasing to 20 to
30 knots. A chance of snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet.
.SUNDAY...North winds 20 to 30 knots backing northwest by mid
afternoon. A chance of snow showers in the morning. Waves
subsiding to 4 to 8 feet occasionally to 10 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots becoming west
10 to 20 knots by midnight, then increasing to 15 to 25 knots
late. Waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet.
.MONDAY...West winds 20 to 30 knots. A chance of snow showers.
Waves building to 7 to 10 feet occasionally to 13 feet.
.MONDAY NIGHT...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 10 to 20 knots. Waves subsiding to 2 to
4 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots increasing to 20 to
30 knots after midnight. A chance of snow showers in the evening,
then snow showers likely after midnight. Waves 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.
.THURSDAY...West winds 20 to 30 knots. Freezing spray. A chance
of snow showers. Waves building to 6 to 9 feet occasionally to
11 feet.

$$

LSZ265-300900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EST Sat Nov 29 2025

...GALE WARNING IN EFFECT FROM 4 AM EST SUNDAY THROUGH SUNDAY
EVENING...

.LATE THIS AFTERNOON...East winds 10 to 20 knots. 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 likely. Waves building to 4 to 7 feet occasionally to
9 feet.
.SUNDAY...North gales to 35 knots backing northwest by mid
afternoon. 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.
.SUNDAY NIGHT...Northwest winds 20 to 30 knots becoming west
15 to 25 knots by midnight. A chance of snow showers. Waves
subsiding to 1 to 3 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 2 to 4 feet.
.MONDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. 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 backing southwest in the
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots veering west
after midnight. A chance of snow showers in the evening, then
snow showers likely after midnight. Waves building to 2 to
4 feet.
.WEDNESDAY...Northwest gales to 35 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.
.THURSDAY...West winds 20 to 30 knots. A chance of snow showers,
then snow showers likely. Waves subsiding to 2 to 4 feet.

$$

LSZ266-300900-
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 PM EST Sat Nov 29 2025

...GALE WARNING IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
EVENING...

.LATE THIS AFTERNOON...East winds 10 to 20 knots. A chance of
snow showers. Waves calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots becoming east 15 to
25 knots by midnight, then becoming northeast 20 to 30 knots
late. Snow showers likely. Waves building to 4 to 7 feet
occasionally to 9 feet.
.SUNDAY...North gales to 35 knots becoming northwest gales to
40 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 diminishing to
15 to 25 knots by midnight, then backing west late. Snow showers
in the evening. A chance of snow showers after midnight. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY...Southwest winds 20 to 30 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 6 feet occasionally to 8 feet.
.TUESDAY...West winds 15 to 25 knots. A chance of snow showers.
Waves subsiding to 2 to 4 feet.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots becoming west
20 to 30 knots after midnight. A chance of snow showers in the
evening, then snow showers likely after midnight. Waves 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.
.THURSDAY...West winds 20 to 30 knots backing southwest. Freezing
spray. Snow showers likely. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.

$$

LSZ267-300900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EST Sat Nov 29 2025

...GALE WARNING IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY
EVENING...

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. A slight
chance of snow showers. Waves 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 6 feet occasionally to 8 feet.
.SUNDAY...Northeast winds 20 to 30 knots becoming north gales to
35 knots. A chance of snow showers. Waves building to 6 to 9 feet
occasionally to 11 feet.
.SUNDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots by midnight, then backing west late. Snow showers
in the evening, then a chance of snow showers after midnight.
Waves subsiding to 3 to 5 feet occasionally to 7 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. Snow showers likely. 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. Snow showers likely in the
morning, then a chance of snow showers in the afternoon. Waves
subsiding to 2 to 4 feet.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots becoming west
20 to 30 knots after midnight. A chance of snow showers in the
evening, then snow showers after midnight. Waves 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.
.THURSDAY...West winds 20 to 30 knots backing southwest. Freezing
spray. Snow showers. Waves subsiding to 6 to 9 feet occasionally
to 11 feet, then building to 7 to 10 feet occasionally to
13 feet.

$$

LSZ261-300300-
MAFOR 2922/
Superior West 11130 11137 11140 13840 12730. Waves 2 to 4 feet
building to 5 to 8 feet tonight. Waves 5 to 8 feet subsiding to 3
to 6 feet Sunday.

Superior North Central 11110 11120 11137 12140 12840 11740. Waves
1 to 3 feet building to 4 to 7 feet tonight. Waves 5 to 8 feet
Sunday.

Superior South Central...GALE WARNING IN EFFECT...11210 12227
11137 11157 12850 11750. Waves 1 to 3 feet building to 3 to 6
feet tonight. Waves 6 to 10 feet Sunday.

Superior East...GALE WARNING IN EFFECT...12320 11327 11237 11137
11140 12840. Waves 1 to 3 feet building to 3 to 5 feet tonight.
Waves 4 to 7 feet Sunday.

$$

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