153
FZUS63 KMQT 172101
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EST Sat Jan 17 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 29.9 inch ridge will build over the lake tonight ahead of an
approaching clipper low. The low will move over the lake on Sunday
and deepen to 29.6 inches by Sunday night. The low will then move to
Quebec on Monday while a high pressure of 30.6 inches drops south
over the Plains. This builds ridging of 30.1 inches over much of
Lake Superior on Monday which weakens on Tuesday. A low of at least
29.9 inches then moves over Lake Superior on Wednesday. As the low
moves east a weak trough of 30.0 inches will extend over the lake
while a 30.5 inch high builds into the Canadian Prairies.


LSZ162-180900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EST Sat Jan 17 2026 /300 PM CST Sat Jan 17 2026/

.LATE THIS AFTERNOON...North winds 15 to 25 knots. A slight
chance of snow showers. Waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet.
.TONIGHT...North winds 15 to 25 knots becoming northwest 10 to
20 knots by midnight, then backing west late. A chance of snow
showers. Waves subsiding to calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots veering northwest by mid
afternoon. A chance of snow showers in the morning, then snow
showers in the afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...North winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible by midnight,
then backing northwest late. Heavy freezing spray. A slight
chance of snow showers. Waves building to 4 to 7 feet
occasionally to 9 feet.
.MONDAY...Northwest winds 20 to 30 knots backing west in the
afternoon. Heavy freezing spray in the morning. A slight chance
of snow showers. Waves subsiding to 2 to 4 feet.
.MONDAY NIGHT...West winds 15 to 25 knots. Waves subsiding to
1 to 3 feet.
.TUESDAY...West winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. Waves 1 to 3 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots. Waves building to
2 to 4 feet, then subsiding to 1 to 3 feet.
.THURSDAY...West winds 10 to 20 knots veering northwest. Waves
subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-180900-
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 Jan 17 2026

...GALE WATCH IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY
MORNING...

.LATE THIS AFTERNOON...North winds 15 to 25 knots. Freezing
spray. A chance of snow showers. Waves 3 to 6 feet occasionally
to 8 feet.
.TONIGHT...North winds 15 to 25 knots diminishing to 5 to
15 knots by midnight, then increasing to 10 to 20 knots late. A
chance of snow showers. Waves subsiding to 1 to 3 feet.
.SUNDAY...Southwest winds 10 to 20 knots veering west by mid
afternoon. A chance of snow showers in the morning, then snow
showers in the afternoon. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...North winds 20 to 30 knots increasing to gales to
35 knots by midnight. Heavy freezing spray. A chance of snow
showers. Waves building to 8 to 12 feet occasionally to 15 feet.
.MONDAY...Northwest gales to 35 knots diminishing to 15 to
25 knots in the afternoon. Heavy freezing spray. A chance of snow
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet,
then building to 4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Heavy freezing spray. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...West winds 15 to 25 knots. Heavy freezing spray in the
morning. Waves 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots. Waves building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Northwest winds 15 to 25 knots. Waves subsiding to
2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-180900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EST Sat Jan 17 2026

...HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 1 AM EST SUNDAY...
...GALE WATCH IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY
AFTERNOON...

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Freezing
spray. A chance of snow showers. Waves 4 to 7 feet occasionally
to 9 feet.
.TONIGHT...North winds 15 to 25 knots diminishing to 5 to
15 knots. Freezing spray in the evening. A chance of snow
showers. Waves subsiding to 1 to 3 feet.
.SUNDAY...North winds 10 to 20 knots backing southwest by late
morning, then veering west by mid afternoon. A chance of snow
showers in the morning, then snow showers in the afternoon. Waves
subsiding to calm to 2 feet, then building to 2 to 4 feet.
.SUNDAY NIGHT...North winds 20 to 30 knots increasing to gales to
40 knots by midnight. Heavy freezing spray. A chance of snow
showers. Waves building to 10 to 14 feet occasionally to 18 feet.
.MONDAY...North gales to 35 knots becoming northwest 20 to
30 knots in the afternoon. Heavy freezing spray. A chance of snow
showers. Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...Northwest winds 20 to 30 knots. Heavy freezing
spray. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. Heavy freezing spray. Waves 3 to
6 feet occasionally to 8 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots. Waves building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-180900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EST Sat Jan 17 2026

...GALE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY
AFTERNOON...

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Freezing
spray. Snow showers likely. Waves 4 to 7 feet occasionally to
9 feet.
.TONIGHT...North winds 15 to 25 knots becoming northwest 10 to
20 knots by midnight, then backing west late. Freezing spray in
the evening. A chance of snow showers. Waves subsiding to 2 to
4 feet.
.SUNDAY...West winds 10 to 20 knots. A chance of snow showers.
Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...West winds 15 to 25 knots becoming north gales to
45 knots by midnight. Heavy freezing spray. Snow showers. Waves
building to 11 to 15 feet occasionally to 19 feet.
.MONDAY...Northwest gales to 40 knots. Heavy freezing spray. Snow
showers likely. Waves building to 12 to 17 feet occasionally to
21 feet, then subsiding to 5 to 8 feet occasionally to 10 feet.
.MONDAY NIGHT...Northwest gales to 35 knots backing west after
midnight. Heavy freezing spray. A chance of snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...West gales to 35 knots diminishing to 20 to 30 knots
in the afternoon. Heavy freezing spray. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.TUESDAY NIGHT...Southwest winds 20 to 30 knots becoming west
15 to 25 knots after midnight. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.WEDNESDAY...West winds 20 to 30 knots becoming northwest gales
to 35 knots. A chance of snow showers. Waves building to 3 to
6 feet occasionally to 8 feet.
.THURSDAY...West gales to 35 knots diminishing to 20 to 30 knots.
A chance of snow showers. Waves subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-180900-
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 Jan 17 2026

...GALE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY
EVENING...

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Freezing
spray. Snow showers likely. Waves 4 to 7 feet occasionally to
9 feet.
.TONIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots late. Freezing spray in the evening. Snow showers likely
in the evening, then a chance of snow showers after midnight.
Waves subsiding to 2 to 4 feet.
.SUNDAY...West winds 10 to 20 knots backing southwest. A chance
of snow showers in the morning, then snow showers in the
afternoon. Waves subsiding to 1 to 3 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots becoming north
gales to 40 knots by midnight. Heavy freezing spray. Snow
showers. Waves building to 12 to 17 feet occasionally to 21 feet.
.MONDAY...North gales to 40 knots becoming northwest gales to
35 knots in the afternoon. Heavy freezing spray. Snow showers.
Waves subsiding to 9 to 12 feet occasionally to 15 feet.
.MONDAY NIGHT...Northwest gales to 35 knots. Heavy freezing
spray. Snow showers likely in the evening. A chance of snow
showers after midnight. Waves subsiding to 6 to 9 feet
occasionally to 11 feet.
.TUESDAY...West winds 20 to 30 knots. Heavy freezing spray. A
chance of snow showers. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.TUESDAY NIGHT...West winds 20 to 30 knots becoming southwest
15 to 25 knots after midnight. Freezing spray in the evening. A
chance of snow showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY...West winds 20 to 30 knots becoming northwest gales
to 35 knots. A chance of snow showers. Heavy freezing spray.
Waves building to 6 to 9 feet occasionally to 11 feet.
.THURSDAY...Northwest winds 20 to 30 knots backing west. Heavy
freezing spray. A chance of snow showers. Waves subsiding to 4 to
7 feet occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-180900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EST Sat Jan 17 2026

...GALE WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY
AFTERNOON...

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

Note, wave height forecasts are for ice free areas.

$$

LSZ261-180300-
MAFOR 1722/
Superior West 11830 11820 12710 11620 11520 11527 11627. Waves 3
to 5 feet subsiding to 1 to 3 feet tonight. Waves 1 to 3 feet
Sunday.

Superior North Central...HEAVY FREEZING SPRAY WARNING IN EFFECT...
11840 11830 11820 11710 11700 11710 11420 11527. Waves 5 to 7
feet subsiding to 2 to 4 feet tonight. Waves 1 to 3 feet Sunday.

Superior South Central 12837 12720 13610 11617. Waves 4 to 7 feet
subsiding to 3 to 6 feet tonight. Waves 2 to 4 feet subsiding to
1 to 2 feet Sunday.

Superior East 12830 12810 11100 11210 11337 11437. Waves 3 to 6
feet subsiding to 2 to 4 feet tonight. Waves 1 to 3 feet Sunday.

$$

WFO MQT

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weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes