160
FZUS63 KMQT 222101
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EST Sat Nov 22 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 weak 29.0 inch low track SE across Lake Superior tonight through
early Sunday. The weak low presses east and weakens to 29.0 inches
while 30.0 inch ridging returns overhead Lake Superior through
Monday. Broad 29.9 inch low pressure then emanates out of the Plains
and northern Rockies before deepening to near 29.4 inch low pressure
over Lake Superior Wednesday. This low then deepens to near 29.1
inches while ascending north into Quebec Thursday while 30.4 inch
high pressure returns to the Plains. This creates a strong pressure
gradient over Lake Superior Thursday and Friday before the pressure
gradient slackens as the high pressure moves into the Great Lakes.


LSZ162-230900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EST Sat Nov 22 2025 /300 PM CST Sat Nov 22 2025/

.LATE THIS AFTERNOON...West winds 20 to 30 knots. Waves 2 to
4 feet.
.TONIGHT...West winds 20 to 30 knots. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
.SUNDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 10 to 20 knots. Waves calm to
2 feet.
.MONDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. A slight chance of rain showers in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots backing northeast after
midnight. A chance of rain showers in the evening, then rain
showers likely after midnight. Waves calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Rain showers. Waves building to 2 to
4 feet.
.TUESDAY NIGHT...North winds 20 to 30 knots. Rain showers,
possibly mixed with snow. Waves building to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...Northwest gales to 35 knots. Snow showers likely,
then a chance of snow showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Waves subsiding to calm to 2 feet.

$$

LSZ263-230900-
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 22 2025

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

$$

LSZ264-230900-
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 22 2025

.LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. A chance
of rain showers. Waves 2 to 4 feet.
.TONIGHT...West winds 20 to 30 knots veering northwest by
midnight. A slight chance of rain showers in the evening. Waves
building to 6 to 9 feet occasionally to 11 feet.
.SUNDAY...Northwest winds 20 to 30 knots becoming west 15 to
25 knots by late morning, then diminishing to 10 to 20 knots by
mid afternoon. Waves subsiding to 2 to 4 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.MONDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots. A chance of rain
showers in the evening, then rain showers likely after midnight.
Waves building to 1 to 3 feet.
.TUESDAY...East winds 10 to 20 knots becoming northeast 15 to
25 knots in the afternoon. Rain showers likely. Waves building to
3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...Northeast winds 20 to 30 knots becoming north
gales to 35 knots after midnight. Rain showers, possibly mixed
with snow. Waves building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY...Northwest gales to 40 knots. Snow showers likely.
Waves building to 7 to 10 feet occasionally to 13 feet.
.THURSDAY...Northwest gales to 40 knots. A chance of snow
showers. Waves subsiding to 4 to 7 feet occasionally to 9 feet.

$$

LSZ265-230900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EST Sat Nov 22 2025

...GALE WARNING IN EFFECT FROM MIDNIGHT EST TONIGHT THROUGH
SUNDAY MORNING...

.LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. A chance
of rain showers. Waves 2 to 4 feet.
.TONIGHT...West winds 20 to 30 knots becoming northwest gales to
40 knots by midnight. A slight chance of rain showers in the
evening. Waves building to 5 to 8 feet occasionally to 10 feet.
.SUNDAY...Northwest gales to 35 knots becoming west 20 to
30 knots by late morning, then diminishing to 10 to 20 knots by
mid afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 10 to 20 knots. Waves calm to
2 feet.
.MONDAY...Southwest winds 10 to 20 knots backing south in the
afternoon. A slight chance of showers in the afternoon. Waves
calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots backing southeast after
midnight. Rain showers. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots becoming east 15 to
25 knots in the afternoon. Rain showers. Waves building to 1 to
3 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots becoming north gales
to 35 knots after midnight. Rain showers. Snow showers after
midnight. Waves building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...Northwest gales to 45 knots. Snow showers. Waves
building to 6 to 9 feet occasionally to 11 feet.
.THURSDAY...Northwest gales to 40 knots. Snow showers. Waves
subsiding to 5 to 8 feet occasionally to 10 feet, then building
to 6 to 9 feet occasionally to 11 feet.

$$

LSZ266-230900-
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 22 2025

...GALE WARNING IN EFFECT FROM MIDNIGHT EST TONIGHT THROUGH
SUNDAY MORNING...

.LATE THIS AFTERNOON...South winds 20 to 30 knots. A chance of
rain showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Southwest winds 20 to 30 knots becoming northwest
gales to 40 knots by midnight. A chance of rain showers. Waves
building to 9 to 12 feet occasionally to 15 feet.
.SUNDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots by late morning, then becoming west 15 to 25 knots by
mid afternoon. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.SUNDAY NIGHT...Southwest winds 10 to 20 knots backing south by
midnight, then veering southwest late. Waves subsiding to calm to
2 feet.
.MONDAY...Southwest winds 15 to 25 knots becoming south 10 to
20 knots in the afternoon. A slight chance of rain showers in the
afternoon. Waves building to 1 to 3 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. Rain showers. Waves
1 to 3 feet.
.TUESDAY...Southeast winds 10 to 20 knots. Rain showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...Southeast winds 15 to 25 knots becoming south
20 to 30 knots after midnight. Rain showers. Snow showers after
midnight. Waves building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY...Northwest gales to 40 knots. Snow showers. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 9 to 12 feet occasionally to 15 feet.
.THURSDAY...Northwest gales to 40 knots. Snow showers. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet.

$$

LSZ267-230900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EST Sat Nov 22 2025

...GALE WARNING IN EFFECT FROM MIDNIGHT EST TONIGHT THROUGH
SUNDAY MORNING...

.LATE THIS AFTERNOON...South winds 20 to 30 knots. Rain showers
likely. Waves 3 to 5 feet occasionally to 7 feet.
.TONIGHT...Southwest winds 20 to 30 knots veering west by
midnight, then becoming northwest gales to 35 knots late. A
chance of rain showers. Waves building to 9 to 12 feet
occasionally to 15 feet.
.SUNDAY...Northwest gales to 40 knots diminishing to 20 to
30 knots by mid afternoon. A slight chance of rain showers in the
morning. Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots backing south by
midnight. Waves subsiding to 1 to 3 feet.
.MONDAY...Southwest winds 15 to 25 knots backing south in the
afternoon. A slight chance of rain showers in the afternoon.
Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. Rain showers. Waves
building to 1 to 3 feet.
.TUESDAY...Southeast winds 10 to 20 knots. Rain showers. Waves
building to 2 to 4 feet.
.TUESDAY NIGHT...Southeast winds 15 to 25 knots becoming south
20 to 30 knots after midnight. Rain showers. Waves building to
4 to 7 feet occasionally to 9 feet.
.WEDNESDAY...West gales to 35 knots becoming northwest gales to
40 knots. Rain showers. Snow showers. Waves building to 10 to
14 feet occasionally to 18 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet.
.THURSDAY...Northwest gales to 35 knots. Snow showers. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet.

$$

LSZ261-230300-
MAFOR 2222/
Superior West 11630 11640 12740 11630 12620 11510. Waves 3 to 6
feet tonight. Waves 3 to 5 feet subsiding to 1 to 3 feet Sunday.

Superior North Central 11530 11640 14740 12630. A chance of rain
showers this evening. Waves 2 to 4 feet building to 6 to 9 feet
tonight. Waves 5 to 9 feet subsiding to 2 to 4 feet Sunday.

Superior South Central...GALE WARNING IN EFFECT...11530 11640
13750 12740 11630. A chance of showers this evening. Waves 3 to 6
feet building to 7 to 10 feet tonight. Waves 6 to 10 feet
subsiding to 3 to 6 feet Sunday.

Superior East...GALE WARNING IN EFFECT...11436 11530 11640 13750
12740. Waves 3 to 6 feet building to 8 to 11 feet tonight. Waves
8 to 12 feet subsiding to 6 to 9 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