554
FZUS63 KMQT 201501
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 AM EST Tue Jan 20 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...

Troughing of at least 30.0 inches remains over Lake Superior while a
30.5 inch high sits over the Lower Mississippi Valley and a 29.7
inch low sits over Hudson Bay. By tonight, the high will shift over
the Virginias at 30.6 inches while the low remains stationary.
Meanwhile, a 30.0 inch low forms over the OK Panhandle, quickly
moving over Lake Michigan by Wednesday morning while the 29.8 inch
low drops south through Ontario. By midday Wednesday, the first low
will move over the Michigan Lower Peninsula at 29.9 inches as the
second low deepens to 29.7 inches over Lake Superior by evening.
These features consolidate into a 29.7 inch low over northeastern
Ontario Wednesday night before shifting to Quebec Thursday morning.
In the wake of the low, 31.0 inch high pressure will be over
Saskatchewan, shifting over the Dakotas Friday and overspreading the
Upper Midwest at around 30.7 inches Saturday.


LSZ162-202100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 AM EST Tue Jan 20 2026 /901 AM CST Tue Jan 20 2026/

.REST OF TODAY...West winds 15 to 25 knots. Isolated snow
showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots late. Isolated snow showers. Waves subsiding to 1 to
3 feet.
.WEDNESDAY...West winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of snow showers. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots. Waves building
to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A slight chance of snow showers in the
afternoon. Waves 3 to 5 feet occasionally to 7 feet.
.THURSDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Waves subsiding to 2 to 4 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-202100-
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-
1001 AM EST Tue Jan 20 2026

...HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 10 PM EST THIS
EVENING...

.REST OF TODAY...West winds 15 to 25 knots increasing to 20 to
30 knots. Heavy freezing spray. Scattered snow showers. Waves
5 to 9 feet occasionally to 11 feet.
.TONIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots late. Freezing spray in the evening. Scattered snow
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...North winds 5 to 15 knots becoming west 10 to
20 knots. A chance of snow showers. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. Heavy freezing spray. A slight
chance of snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet.
.THURSDAY...Northwest winds 20 to 30 knots. Heavy freezing spray.
A chance of snow showers. Waves subsiding to 4 to 8 feet
occasionally to 10 feet.
.THURSDAY NIGHT...Northwest winds 20 to 30 knots. Heavy freezing
spray. A chance of snow showers. Waves 5 to 8 feet occasionally
to 10 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Heavy freezing spray. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 5 to 15 knots. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-202100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 AM EST Tue Jan 20 2026

...HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 10 PM EST THIS
EVENING...

.REST OF TODAY...West winds 20 to 30 knots. Heavy freezing spray.
Scattered snow showers. Waves 5 to 9 feet occasionally to
11 feet.
.TONIGHT...West winds 15 to 25 knots becoming northwest 10 to
20 knots late. Freezing spray in the evening. Scattered snow
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots. A chance of snow showers. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. Heavy freezing spray. A slight
chance of snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet.
.THURSDAY...Northwest winds 20 to 30 knots. Heavy freezing spray.
A chance of snow showers. Waves subsiding to 4 to 7 feet
occasionally to 9 feet.
.THURSDAY NIGHT...Northwest winds 20 to 30 knots. Heavy freezing
spray. A chance of snow showers. Waves building to 6 to 9 feet
occasionally to 11 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Heavy freezing spray. A chance of snow showers. Waves
subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-202100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 AM EST Tue Jan 20 2026

...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...West winds to 30 knots with a few gale force
gusts to 35 knots possible. Heavy freezing spray. Numerous snow
showers late in the morning. Scattered snow showers in the
afternoon. Waves 4 to 8 feet occasionally to 10 feet.
.TONIGHT...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots late. Heavy freezing spray in the evening. Scattered
snow showers. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots veering west by mid
afternoon. A chance of snow showers. Waves subsiding to calm to
2 feet, then building to 2 to 4 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots increasing to gales
to 35 knots after midnight. Heavy freezing spray. A chance of
snow showers. Waves building to 5 to 8 feet occasionally to
10 feet.
.THURSDAY...West gales to 40 knots. Heavy freezing spray. A
chance of snow showers. Waves 5 to 8 feet occasionally to
10 feet.
.THURSDAY NIGHT...Northwest gales to 40 knots. Heavy freezing
spray. Snow showers likely in the evening. A chance of snow
showers after midnight. Waves building to 6 to 9 feet
occasionally to 11 feet.
.FRIDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. Heavy freezing spray. A chance of snow showers. Waves
subsiding to 2 to 4 feet.
.SATURDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-202100-
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-
1001 AM EST Tue Jan 20 2026

...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...West winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 20 to 30 knots by mid
afternoon. Heavy freezing spray. Snow showers. Waves 8 to 11 feet
occasionally to 14 feet building to 9 to 12 feet occasionally to
15 feet.
.TONIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots late. Heavy freezing spray. Scattered snow showers.
Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots by mid afternoon. A chance of snow showers. Waves
subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots becoming northwest
gales to 35 knots after midnight. Heavy freezing spray. A chance
of snow showers. Waves building to 7 to 10 feet occasionally to
13 feet.
.THURSDAY...West gales to 35 knots. Heavy freezing spray. Snow
showers likely. Waves building to 9 to 12 feet occasionally to
15 feet.
.THURSDAY NIGHT...Northwest gales to 40 knots. Heavy freezing
spray. Snow showers likely. Waves subsiding to 8 to 11 feet
occasionally to 14 feet, then building to 9 to 12 feet
occasionally to 15 feet.
.FRIDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. Heavy freezing spray. A chance of snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...Northwest winds 15 to 25 knots backing west. A chance
of snow showers. Waves subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-202100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 AM EST Tue Jan 20 2026

...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH WEDNESDAY
MORNING...

.REST OF TODAY...West winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible. Heavy freezing
spray. Snow showers. Waves 8 to 11 feet occasionally to 14 feet
building to 9 to 12 feet occasionally to 15 feet.
.TONIGHT...Southwest winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 15 to 25 knots late.
Heavy freezing spray. Scattered snow showers. Waves subsiding to
4 to 7 feet occasionally to 9 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then increasing to 15 to 25 knots by
mid afternoon. Freezing spray in the morning. A chance of snow
showers. Waves subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots becoming northwest
gales to 35 knots after midnight. Freezing spray. Snow showers
likely. Waves building to 7 to 10 feet occasionally to 13 feet.
.THURSDAY...West gales to 35 knots. Heavy freezing spray. Snow
showers likely. Waves building to 9 to 12 feet occasionally to
15 feet.
.THURSDAY NIGHT...Northwest gales to 35 knots. Heavy freezing
spray. Snow showers. Waves subsiding to 8 to 11 feet occasionally
to 14 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Heavy freezing spray. Snow showers likely. A chance of
snow showers. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.SATURDAY...Northwest winds 10 to 20 knots backing west. A chance
of snow showers. Waves subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-202100-
MAFOR 2016/
Superior West...HEAVY FREEZING SPRAY WARNING IN EFFECT...12642
19647 11642 11640 11630 12620 19627 11610. Waves 4 to 7 feet this
afternoon. Waves 4 to 7 feet subsiding to 3 to 6 feet tonight.
Waves 2 to 4 feet subsiding to 1 to 3 feet Wednesday morning.

Superior North Central...HEAVY FREEZING SPRAY WARNING IN EFFECT...
13642 19647 12630 19637 11720 19727 11710 19717 11710. Waves 5 to
9 feet this afternoon. Waves 5 to 9 feet subsiding to 3 to 6 feet
tonight. Waves 3 to 5 feet subsiding to 2 to 3 feet Wednesday
morning.

Superior South Central...HEAVY FREEZING SPRAY WARNING IN EFFECT...
11647 12642 19647 11542 19547 11542 12530 11520. Waves 6 to 9
feet this afternoon. Waves 5 to 9 feet subsiding to 3 to 6 feet
tonight. Waves 2 to 4 feet subsiding to 1 to 3 feet Wednesday
morning.

Superior East...HEAVY FREEZING SPRAY WARNING IN EFFECT...11647
12657 11650 19657 12540 19547 11530 19537 11520. Waves 7 to 10
feet building to 9 to 12 feet this afternoon. Waves 8 to 12 feet
subsiding to 6 to 9 feet tonight. Waves 4 to 7 feet Wednesday
morning.

$$

WFO MQT

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