108
FZUS63 KMQT 220301
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM EST Sat Feb 21 2026

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 30.0 inch low over Lake Huron tonight remains over the Bruce
Peninsula while a 31.2 inch high pressure builds over northern
Saskatchewan. Through Sunday, the low is gradually absorbed into a
28.9 inch nor`easter off the Delmarva Peninsula as high pressure
slides over Manitoba at 31.0 inches, extending 30.7 inch ridging
over western Lake Superior. The high weakens slightly to 30.7 inches
over northern Ontario by Monday afternoon before sharply weakening
to 30.2 inches over the Ontario/Quebec line Tuesday morning.
Meanwhile, broad 29.8 inch low pressure forms over the Plains,
sending at least one low of around 29.5 inches through the Great
Lakes basin during the midweek period. Weak ridging then builds over
Lake Superior at around 29.9 inches for Thursday before the next
clipper low approaches Lake Superior from the NW for Friday.


LSZ162-220900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EST Sat Feb 21 2026 /900 PM CST Sat Feb 21 2026/

.REST OF TONIGHT...North winds 15 to 25 knots increasing to 20 to
30 knots late. A slight chance of. Waves 2 to 4 feet building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.SUNDAY...North winds 20 to 30 knots. A slight chance of snow
showers. Waves building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY NIGHT...North winds 20 to 30 knots diminishing to 10 to
20 knots. A chance of. Waves subsiding to 2 to 4 feet.
.MONDAY...Northeast winds 10 to 20 knots becoming east 5 to
15 knots in the afternoon. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots becoming south
15 to 25 knots after midnight. A chance of snow showers. Waves
building to 1 to 3 feet.
.TUESDAY...South winds 10 to 20 knots veering southwest in the
afternoon. Snow showers likely in the morning, then a chance of
snow showers in the afternoon. Waves building to 2 to 4 feet,
then subsiding to calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.THURSDAY...Southwest winds 10 to 20 knots. Waves building to
1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-220900-
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 PM EST Sat Feb 21 2026

...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 7 AM EST SUNDAY
THROUGH LATE SUNDAY NIGHT...

.REST OF TONIGHT...North winds 15 to 25 knots. A chance of snow
showers. Waves 2 to 4 feet building to 4 to 7 feet occasionally
to 9 feet.
.SUNDAY...North winds 20 to 30 knots. Heavy freezing spray. A
chance of snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet.
.SUNDAY NIGHT...North winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 20 to 30 knots late.
Heavy freezing spray and a slight chance of. A slight chance of.
Waves building to 7 to 10 feet occasionally to 13 feet, then
subsiding to 5 to 8 feet occasionally to 10 feet.
.MONDAY...North winds 15 to 25 knots becoming northeast 5 to
15 knots in the afternoon. Waves subsiding to 1 to 3 feet.
.MONDAY NIGHT...East winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight. A chance of snow showers after midnight.
Waves subsiding to calm to 2 feet, then building to 2 to 4 feet.
.TUESDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Snow showers likely in the morning,
then a chance of snow showers in the afternoon. Waves 2 to
4 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots. Waves building
to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to
6 feet occasionally to 8 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots veering north. Waves
subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots. Waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-220900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 PM EST Sat Feb 21 2026

...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH MONDAY
AFTERNOON...
...GALE WARNING IN EFFECT FROM SUNDAY AFTERNOON THROUGH LATE
SUNDAY NIGHT...

.REST OF TONIGHT...North winds 15 to 25 knots increasing to 20 to
30 knots late. Freezing spray. A chance of snow showers. Waves
3 to 6 feet occasionally to 8 feet building to 5 to 8 feet
occasionally to 10 feet.
.SUNDAY...North winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. Heavy freezing spray. A chance of snow
showers. Waves building to 7 to 10 feet occasionally to 13 feet.
.SUNDAY NIGHT...North gales to 35 knots diminishing to 20 to
30 knots late. Heavy freezing spray. Waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet.
.MONDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Heavy freezing spray in the morning.
Waves subsiding to 1 to 3 feet.
.MONDAY NIGHT...East winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight. A slight chance of snow showers after
midnight. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.
.TUESDAY...South winds 15 to 25 knots. Snow showers likely in the
morning, then a chance of snow showers in the afternoon. Freezing
spray in the afternoon. Waves building to 5 to 8 feet
occasionally to 10 feet.
.TUESDAY NIGHT...Southeast winds 10 to 20 knots becoming
northwest 15 to 25 knots after midnight. Freezing spray. A chance
of snow showers. Waves building to 5 to 9 feet occasionally to
11 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. Freezing spray. Waves subsiding to 2 to 4 feet, then
building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Northwest winds 10 to 20 knots backing southwest.
Waves subsiding to 1 to 3 feet, then building to 3 to 6 feet
occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-220900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 PM EST Sat Feb 21 2026

...GALE WARNING IN EFFECT FROM SUNDAY AFTERNOON THROUGH LATE
SUNDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM SUNDAY AFTERNOON
THROUGH MONDAY AFTERNOON...

.REST OF TONIGHT...Northwest winds 20 to 30 knots veering north
by midnight, then increasing to gales to 35 knots late. Snow
showers likely late in the evening, then a chance of snow showers
after midnight. Freezing spray after midnight. Waves 3 to 5 feet
occasionally to 7 feet building to 5 to 8 feet occasionally to
10 feet.
.SUNDAY...North gales to 35 knots. Heavy freezing spray. A chance
of snow showers. Waves building to 8 to 11 feet occasionally to
14 feet.
.SUNDAY NIGHT...North gales to 40 knots. Heavy freezing spray. A
chance of snow showers. Waves building to 8 to 12 feet
occasionally to 15 feet.
.MONDAY...North winds 20 to 30 knots diminishing to 10 to
20 knots in the afternoon. Heavy freezing spray. A chance of snow
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...North winds 10 to 20 knots veering south after
midnight. A slight chance of snow showers after midnight. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.TUESDAY...South winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. A chance of snow showers in the
morning, then snow showers likely in the afternoon. Waves
building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots becoming west 20 to
30 knots after midnight. A chance of snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Freezing spray. Waves subsiding to 3 to 5 feet
occasionally to 7 feet, then building to 4 to 7 feet occasionally
to 9 feet.
.THURSDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots. Freezing spray. Waves subsiding to calm to 2 feet, then
building to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-220900-
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 PM EST Sat Feb 21 2026

...GALE WARNING IN EFFECT FROM SUNDAY AFTERNOON THROUGH LATE
SUNDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM SUNDAY AFTERNOON
THROUGH MONDAY AFTERNOON...

.REST OF TONIGHT...North winds 15 to 25 knots. A chance of snow
showers. Freezing spray after midnight. Waves 3 to 6 feet
occasionally to 8 feet building to 5 to 8 feet occasionally to
10 feet.
.SUNDAY...North winds 20 to 30 knots increasing to gales to
35 knots. Freezing spray. A chance of snow showers. Waves
building to 8 to 11 feet occasionally to 14 feet.
.SUNDAY NIGHT...North gales to 40 knots. Heavy freezing spray. A
chance of snow showers. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 8 to 11 feet
occasionally to 14 feet.
.MONDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. A chance of snow showers in the
morning. Heavy freezing spray. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...North winds 5 to 15 knots becoming southeast
15 to 25 knots after midnight. A slight chance of snow showers
after midnight. Waves subsiding to 1 to 3 feet, then building to
2 to 4 feet.
.TUESDAY...South winds 20 to 30 knots backing southeast in the
afternoon. A chance of snow showers in the morning, then snow
showers likely in the afternoon. Freezing spray in the afternoon.
Waves building to 5 to 8 feet occasionally to 10 feet.
.TUESDAY NIGHT...Southeast winds 20 to 30 knots veering west
after midnight. Freezing spray. A chance of snow showers. Waves
building to 6 to 10 feet occasionally to 13 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 5 to 8 feet occasionally to 10 feet, then building
to 6 to 9 feet occasionally to 11 feet.
.THURSDAY...West winds 15 to 25 knots backing southwest. Freezing
spray. Waves subsiding to 2 to 4 feet, then building to 4 to
7 feet occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-220900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 PM EST Sat Feb 21 2026

...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM SUNDAY AFTERNOON
THROUGH LATE SUNDAY NIGHT...

.REST OF TONIGHT...North winds 10 to 20 knots. A slight chance
of. Waves 1 to 3 feet building to 2 to 4 feet.
.SUNDAY...North winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. Freezing spray in the afternoon. Waves building
to 5 to 8 feet occasionally to 10 feet.
.SUNDAY NIGHT...North winds to 30 knots with a few gale force
gusts to 35 knots possible. Heavy freezing spray. Waves building
to 5 to 9 feet occasionally to 11 feet.
.MONDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. Heavy freezing spray in the morning.
Waves subsiding to 2 to 4 feet.
.MONDAY NIGHT...Northeast winds 10 to 20 knots veering east after
midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A chance of snow showers. Waves
building to 4 to 7 feet occasionally to 9 feet.
.TUESDAY NIGHT...Southeast gales to 35 knots diminishing to 20 to
30 knots after midnight. Freezing spray. Snow showers likely in
the evening. A chance of snow showers after midnight. Waves
building to 4 to 8 feet occasionally to 10 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots veering north.
Freezing spray. A chance of snow showers. Waves building to 5 to
8 feet occasionally to 10 feet.
.THURSDAY...West winds 15 to 25 knots backing southwest. Freezing
spray. Waves subsiding to 2 to 4 feet, then building to 3 to
6 feet occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-220900-
MAFOR 2204/
Superior West...HEAVY FREEZING SPRAY WARNING IN EFFECT...13830
12840 11830 12842. Waves 3 to 6 feet overnight and Sunday. Waves
4 to 7 feet Sunday evening.

Superior North Central...GALE WARNING IN EFFECT...HEAVY FREEZING
SPRAY WARNING IN EFFECT...11847 11840 13842 13852. Waves 5 to 8
feet overnight. Waves 6 to 10 feet Sunday. Waves 8 to 11 feet
Sunday evening.

Superior South Central...GALE WARNING IN EFFECT...HEAVY FREEZING
SPRAY WARNING IN EFFECT...11737 11841 13840 11850 12852. Waves 5
to 8 feet overnight. Waves 6 to 10 feet building to 8 to 11 feet
Sunday. Waves 9 to 13 feet Sunday evening.

Superior East...GALE WARNING IN EFFECT...HEAVY FREEZING SPRAY
WARNING IN EFFECT...12820 12830 13840 11842. Waves 1 to 3 feet
building to 2 to 4 feet overnight. Waves 3 to 6 feet building to
5 to 8 feet Sunday. Waves 6 to 9 feet Sunday evening.

$$

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