240
FZUS63 KMQT 100833
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
333 AM EST Fri Jan 10 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 29.7 inch low spinning through northwestern Hudson
Bay will pull a trough at 29.9 inches through Lake Superior
today. Lingering troughing tonight will organize and deepen into
a 29.6 inch low that is expected to track east into Quebec by Saturday
afternoon. Another 29.6 inch low exits the Northern Plains
Saturday and then pushes into Upper Michigan Sunday night at 29.7
inches. As this low spins into southern Ontario and Quebec
Monday, a 30.4 inch high is forecast to shift south across the
Plains. An associated high pressure ridge at 30.3 inches then
expands over Lake Superior Tuesday.

LSZ162-101645-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
333 AM EST Fri Jan 10 2025 /233 AM CST Fri Jan 10 2025/

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. A slight
chance of snow. Waves calm to 2 feet.
.TODAY...Northwest winds 10 to 20 knots. Isolated snow showers.
Waves calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots. Scattered snow showers.
Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing south by mid
afternoon. Scattered snow showers. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. A chance of snow in the evening,
then snow likely after midnight. Waves calm to 2 feet.
.SUNDAY...Southeast winds 10 to 20 knots veering northwest in the
afternoon. Snow likely. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...Northwest winds 20 to 30 knots. A chance of snow.
Waves building to 3 to 5 feet occasionally to 7 feet.
.MONDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Scattered snow showers. Waves subsiding to 2 to 4 feet.
.TUESDAY...Northwest 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.

$$

LSZ263-101645-
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-
333 AM EST Fri Jan 10 2025

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. A slight
chance of snow. Waves 1 to 3 feet.
.TODAY...Northwest winds 5 to 15 knots veering north by late
morning, then increasing to 10 to 20 knots by mid afternoon.
Scattered snow showers. Waves subsiding to calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots by midnight. Scattered snow showers. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots backing southwest by late
morning, then backing south by mid afternoon. Isolated snow
showers. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots. A chance of
snow. Waves calm to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots becoming west 10 to
20 knots in the afternoon. Snow likely. Waves building to 1 to
3 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. Snow likely. Waves building to
3 to 6 feet occasionally to 8 feet.
.MONDAY...Northwest winds 20 to 30 knots becoming north 15 to
25 knots. Freezing spray. Numerous snow showers. Scattered snow
showers. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots. Waves subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-101645-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
333 AM EST Fri Jan 10 2025

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. A chance of
snow. Waves 2 to 4 feet.
.TODAY...Northwest winds 5 to 15 knots becoming north 10 to
20 knots. Scattered snow showers. Waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet.
.TONIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots late. Isolated snow showers. Waves 2 to 4 feet.
.SATURDAY...North winds 5 to 15 knots. Isolated snow showers.
Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots. A chance of
snow. Waves calm to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Snow. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...North winds 10 to 20 knots becoming northwest
20 to 30 knots after midnight. Snow. Freezing spray after
midnight. Waves building to 4 to 7 feet occasionally to 9 feet.
.MONDAY...Northwest winds 20 to 30 knots veering north. Freezing
spray. Numerous snow showers. Waves building to 4 to 8 feet
occasionally to 10 feet.
.TUESDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots. Freezing spray. Scattered snow showers. Waves subsiding
to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-101645-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
333 AM EST Fri Jan 10 2025

.EARLY THIS MORNING...Southwest winds 10 to 20 knots. Snow
likely. Waves calm to 2 feet.
.TODAY...West winds 10 to 20 knots veering northwest by late
morning, then increasing to 15 to 25 knots by mid afternoon.
Scattered snow showers. Waves building to 1 to 3 feet.
.TONIGHT...Northwest winds 15 to 25 knots. Scattered snow
showers. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Isolated snow showers in the morning.
Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A chance of snow. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots. Snow. Waves building to
1 to 3 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots increasing to 20 to
30 knots after midnight. Snow likely. Waves building to 3 to
6 feet occasionally to 8 feet.
.MONDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. Freezing spray. Snow showers. Waves building to 5 to
8 feet occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Freezing spray. Scattered snow showers. Waves subsiding
to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-101645-
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-
333 AM EST Fri Jan 10 2025

.EARLY THIS MORNING...Southwest winds 10 to 20 knots. Snow
likely. Waves 2 to 4 feet.
.TODAY...Southwest winds 10 to 20 knots veering northwest by late
morning, then increasing to 15 to 25 knots by mid afternoon.
Scattered snow showers. Waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet.
.TONIGHT...Northwest winds 15 to 25 knots veering north by
midnight. Scattered snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...North winds 10 to 20 knots backing northwest by late
morning, then diminishing to 5 to 15 knots by mid afternoon.
Isolated snow showers. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots becoming south
10 to 20 knots after midnight. A chance of snow. Waves calm to
2 feet.
.SUNDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Snow. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots becoming west 20 to
30 knots after midnight. Snow. Waves subsiding to 2 to 4 feet,
then building to 4 to 7 feet occasionally to 9 feet.
.MONDAY...Northwest gales to 35 knots. Freezing spray. Snow
showers. Waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 5 to 8 feet occasionally to 10 feet.
.TUESDAY...North gales to 35 knots diminishing to 15 to 25 knots.
Freezing spray. Scattered snow showers. Waves building to 6 to
9 feet occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-101645-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
333 AM EST Fri Jan 10 2025

.EARLY THIS MORNING...South winds 15 to 25 knots. A slight chance
of snow. Waves 2 to 4 feet.
.TODAY...South winds 10 to 20 knots veering southwest. Snow
showers likely. Waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.
.TONIGHT...Northwest winds 10 to 20 knots veering north late.
Scattered snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then backing northwest by mid
afternoon. Scattered snow showers. Waves subsiding to calm to
2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots becoming south
10 to 20 knots after midnight. A slight chance of snow. Waves
calm to 2 feet.
.SUNDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. Snow. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY NIGHT...South winds 15 to 25 knots veering southwest
after midnight. Snow. Waves subsiding to 1 to 3 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.MONDAY...West winds 20 to 30 knots veering northwest. Snow
showers. Freezing spray. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots. Freezing spray. Scattered snow showers. Waves subsiding
to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-101645-
MAFOR 1010/
Superior West 14720 11820 13810. Waves 1 to 2 feet.

Superior North Central 12710 19717 11720 11730 12830 12820. A
chance of snow early this morning. Waves 2 to 4 feet.

Superior South Central 11527 11610 19617 11620 19627 12720 19727
11730 19737 12720 19727. Waves 1 to 3 feet today. Waves 2 to 4
feet building to 3 to 5 feet tonight.

Superior East 11520 11527 11517 11617 14720 19727. Waves 2 to 4
feet today. Waves 2 to 4 feet building to 3 to 5 feet tonight.

$$

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