227
FZUS63 KMQT 151501
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EST Thu Jan 15 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...

Weak 30.0 inch ridging is analyzed over he lake this morning,
extending from 30.3 inch high pressure sliding from the Plains
towards the Gulf. This ridging is then followed up by a 29.4 inch
low moving over Lake Superior on Friday, which weakens to 29.7
inches over Georgian Bay Saturday. Meanwhile, high pressure ridging
of at least 30.2 inches settles west of the Great Lakes over the
weekend. A clipper low of at least 29.5 inches is then expected to
move over Lake Superior Sunday and continue into Quebec as it
deepens to 29.4 inches on Monday.


LSZ162-152100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EST Thu Jan 15 2026 /900 AM CST Thu Jan 15 2026/

.REST OF TODAY...Southwest winds 15 to 25 knots increasing to
20 to 30 knots by mid afternoon. A chance of snow showers late in
the morning, then snow showers likely in the afternoon. Waves
1 to 3 feet building to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...Southwest winds 15 to 25 knots becoming west 10 to
20 knots by midnight, then veering northwest late. Snow showers
likely. Waves subsiding to calm to 2 feet.
.FRIDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Snow showers likely. Waves building to
2 to 4 feet.
.FRIDAY NIGHT...North winds 20 to 30 knots. A chance of snow
showers. Waves building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...North winds 20 to 30 knots. A chance of snow showers.
Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...West winds 15 to 25 knots becoming northwest gales to
40 knots. Snow showers likely, then a chance of snow showers.
Waves building to 3 to 6 feet occasionally to 8 feet.
.MONDAY...Northwest gales to 35 knots diminishing to 15 to
25 knots. Waves subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-152100-
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 AM EST Thu Jan 15 2026

.REST OF TODAY...South winds 10 to 20 knots increasing to 15 to
25 knots. A slight chance of snow showers late in the morning,
then snow showers likely in the afternoon. Freezing spray in the
afternoon. Waves calm to 2 feet building to 4 to 7 feet
occasionally to 9 feet.
.TONIGHT...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots by midnight, then becoming west 5 to 15 knots late.
Freezing spray in the evening. Snow showers likely. Waves
subsiding to 2 to 4 feet.
.FRIDAY...North winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A chance of snow showers. Waves subsiding to
calm to 2 feet, then building to 1 to 3 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots increasing to 20 to
30 knots after midnight. A chance of snow showers. Freezing spray
after midnight. Waves building to 3 to 6 feet occasionally to
8 feet.
.SATURDAY...North winds 20 to 30 knots. Freezing spray. A chance
of snow showers. Waves building to 5 to 8 feet occasionally to
10 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.SUNDAY...West winds 15 to 25 knots becoming northwest gales to
40 knots. A chance of snow showers. Heavy freezing spray. Waves
building to 7 to 10 feet occasionally to 13 feet.
.MONDAY...Northwest gales to 40 knots diminishing to 20 to
30 knots. Heavy freezing spray. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-152100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 AM EST Thu Jan 15 2026

.REST OF TODAY...South winds 5 to 15 knots increasing to 15 to
25 knots. A chance of snow showers. Waves calm to 2 feet building
to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...South winds 15 to 25 knots diminishing to 5 to
15 knots. Snow showers likely in the evening, then a chance of
snow showers after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet.
.FRIDAY...South winds 5 to 15 knots backing north. A chance of
snow showers. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots increasing to 20 to
30 knots after midnight. A slight chance of snow showers.
Freezing spray after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...North winds 20 to 30 knots. Freezing spray. A chance
of snow showers. Waves building to 4 to 8 feet occasionally to
10 feet.
.SATURDAY NIGHT...North winds 20 to 30 knots becoming northwest
10 to 20 knots after midnight. Freezing spray in the evening.
Waves subsiding to 2 to 4 feet.
.SUNDAY...West winds 15 to 25 knots becoming north gales to
45 knots. A chance of snow showers. Heavy freezing spray. Waves
building to 9 to 12 feet occasionally to 15 feet.
.MONDAY...Northwest gales to 45 knots. Heavy freezing spray.
Waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-152100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EST Thu Jan 15 2026

.REST OF TODAY...West winds 5 to 15 knots becoming southwest
10 to 20 knots by late morning, then becoming south 15 to
25 knots by mid afternoon. A slight chance of snow showers in the
afternoon. Waves 2 to 4 feet subsiding to calm to 2 feet, then
building to 1 to 3 feet.
.TONIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots late. A chance of snow showers. Waves building to 2 to
4 feet, then subsiding to calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots veering northwest by mid
afternoon. A chance of snow showers. Waves calm to 2 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of snow showers. Waves building
to 2 to 4 feet.
.SATURDAY...North winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. A chance of snow showers. Freezing
spray in the afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet.
.SATURDAY NIGHT...North winds 20 to 30 knots becoming northwest
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.
.SUNDAY...West winds 20 to 30 knots becoming northwest gales to
45 knots. A chance of snow showers, then snow showers likely.
Heavy freezing spray. Waves subsiding to 2 to 4 feet, then
building to 9 to 12 feet occasionally to 15 feet.
.MONDAY...Northwest gales to 45 knots. Heavy freezing spray. A
chance of snow showers. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-152100-
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 AM EST Thu Jan 15 2026

.REST OF TODAY...North winds 5 to 15 knots veering south by late
morning, then increasing to 15 to 25 knots by mid afternoon. A
slight chance of snow showers late in the morning. Waves 2 to
4 feet subsiding to calm to 2 feet, then building to 2 to 4 feet.
.TONIGHT...South winds 15 to 25 knots increasing to 20 to
30 knots by midnight, then diminishing to 15 to 25 knots late.
Freezing spray in the evening. Snow showers likely in the
evening, then a chance of snow showers after midnight. Waves
building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...South winds 10 to 20 knots backing southeast. A chance
of snow showers. Waves subsiding to 1 to 3 feet.
.FRIDAY NIGHT...Northeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. A chance of snow showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...North winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A chance of snow showers. Freezing
spray in the afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet.
.SATURDAY NIGHT...North winds 20 to 30 knots becoming northwest
15 to 25 knots after midnight. Freezing spray. A chance of snow
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...West winds 15 to 25 knots becoming northwest gales to
45 knots. Heavy freezing spray. A chance of snow showers. Snow
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet,
then building to 10 to 14 feet occasionally to 18 feet.
.MONDAY...Northwest gales to 45 knots. Heavy freezing spray. A
chance of snow showers. Waves building to 12 to 17 feet
occasionally to 21 feet, then subsiding to 7 to 10 feet
occasionally to 13 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-152100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EST Thu Jan 15 2026

.REST OF TODAY...Northeast winds 10 to 20 knots diminishing to
5 to 15 knots by late morning, then veering south by mid
afternoon. Waves 1 to 3 feet subsiding to calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots increasing to 20 to
30 knots. A chance of snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...Southeast winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Snow showers likely. Waves subsiding
to 1 to 3 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots backing northeast
after midnight. A chance of snow showers. Waves subsiding to calm
to 2 feet.
.SATURDAY...Northeast winds 10 to 20 knots backing north in the
afternoon. A chance of snow showers. Waves building to 2 to
4 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 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.
.SUNDAY...Southwest winds 15 to 25 knots becoming northwest gales
to 35 knots. Freezing spray. A chance of snow showers. Snow
showers. Waves building to 8 to 11 feet occasionally to 14 feet.
.MONDAY...North gales to 35 knots. Heavy freezing spray. Snow
showers likely. A chance of snow showers. Waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-152100-
MAFOR 1516/
Superior West 11537 12547 11537 11527 11617 11717 11710. Waves 2
to 3 feet building to 3 to 6 feet this afternoon. Waves 3 to 6
feet subsiding to 1 to 3 feet tonight. Waves 1 to 2 feet Friday
morning.

Superior North Central 11420 12430 11437 11430 11420 11410 11400.
Waves 1 to 3 feet building to 3 to 5 feet this afternoon. Waves 3
to 6 feet tonight. Waves 2 to 4 feet subsiding to 1 to 3 feet
Friday morning.

Superior South Central 11510 11420 13430 12420 11510. A chance of
snow showers tonight and Friday morning. Waves 2 to 3 feet this
afternoon. Waves 2 to 4 feet tonight. Waves 1 to 3 feet Friday
morning.

Superior East 11200 11410 11420 12430 11437 11447 11337. Waves 1
to 2 feet this afternoon. Waves 1 to 3 feet building to 3 to 6
feet tonight. Waves 3 to 6 feet Friday morning.

$$

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