830
FZUS63 KMQT 050846
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
346 AM EST Wed Feb 5 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...30.6 inch ridging over western Lake Superior early
this morning moves into New England by this evening as it
weakens to 30.4 inches. Behind this ridge, a 29.6 inch trough
sweeps across Lake Superior Thursday, before a 30.3 inch high
moving into the central Mississippi Valley Friday brings 30.1
inch ridging back over the Upper Great Lakes. On Saturday, a 29.7
inch low passes toward the southern end of the Great Lakes
region, extending weak troughing over the lake. Ridging
reinvigorates to 30.3 inches by Sunday as a 30.5 inch high digs
into the Upper Midwest.

LSZ162-051700-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
346 AM EST Wed Feb 5 2025 /246 AM CST Wed Feb 5 2025/

...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northwest winds 5 to 15 knots backing south by late
morning, then backing southeast by mid afternoon. Waves calm to
2 feet.
.TONIGHT...Southeast winds 15 to 25 knots veering south by
midnight, then becoming southwest 20 to 30 knots late. Snow.
Waves building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...West gales to 40 knots. Heavy freezing spray. A
slight chance of snow. Waves building to 9 to 12 feet
occasionally to 15 feet.
.THURSDAY NIGHT...West gales to 40 knots diminishing to 20 to
30 knots after midnight. Heavy freezing spray. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.FRIDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots
in the afternoon. Waves subsiding to 1 to 3 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots becoming northwest
10 to 20 knots. A chance of snow. Waves calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-051700-
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-
346 AM EST Wed Feb 5 2025

...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northwest winds 5 to 15 knots backing southwest by late
morning, then backing southeast by mid afternoon. Waves calm to
2 feet.
.TONIGHT...Southeast winds 10 to 20 knots becoming south 15 to
25 knots by midnight, then increasing to 20 to 30 knots late.
Snow. Waves building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Southwest gales to 40 knots becoming west gales to
45 knots. Freezing spray. Scattered snow showers. Waves building
to 12 to 17 feet occasionally to 21 feet.
.THURSDAY NIGHT...West gales to 40 knots becoming northwest gales
to 35 knots after midnight. Heavy freezing spray. Isolated snow
showers. Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.FRIDAY...West winds 15 to 25 knots. Freezing spray. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots increasing to 10 to
20 knots. A chance of snow. Waves building to 1 to 3 feet.
.SUNDAY...West winds 10 to 20 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-051700-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
346 AM EST Wed Feb 5 2025

...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
MORNING...

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Waves 2 to
4 feet.
.TODAY...Northwest winds 5 to 15 knots backing west by late
morning, then backing south by mid afternoon. Waves subsiding to
calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots increasing to 20 to
30 knots by midnight. A chance of snow in the evening, then snow
after midnight. Waves building to 4 to 7 feet occasionally to
9 feet.
.THURSDAY...Southwest gales to 35 knots becoming west gales to
40 knots. Snow likely in the morning, then scattered snow showers
in the afternoon. Freezing spray in the afternoon. Waves
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
12 to 17 feet occasionally to 21 feet.
.THURSDAY NIGHT...Northwest gales to 40 knots. Heavy freezing
spray. Isolated snow showers. Waves subsiding to 6 to 9 feet
occasionally to 11 feet.
.FRIDAY...West winds 15 to 25 knots. Freezing spray. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding
to 1 to 3 feet.
.SATURDAY...North winds 5 to 15 knots increasing to 10 to
20 knots. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west. A chance
of snow showers. Waves subsiding to 1 to 3 feet, then building to
2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-051700-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
346 AM EST Wed Feb 5 2025

...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
MORNING...

.EARLY THIS MORNING...Northwest winds 15 to 25 knots. Waves 2 to
4 feet.
.TODAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots by late morning, then becoming southeast 10 to 20 knots
by mid afternoon. Waves subsiding to calm to 2 feet.
.TONIGHT...South winds 15 to 25 knots. Snow. Waves building to
3 to 6 feet occasionally to 8 feet.
.THURSDAY...Southwest winds 20 to 30 knots becoming west gales to
45 knots by late morning, then increasing to gales to 45 knots
with a few storm force gusts to 50 knots possible by mid
afternoon. Scattered snow showers in the morning, then snow
showers in the afternoon. Heavy freezing spray in the afternoon.
Waves building to 10 to 14 feet occasionally to 18 feet.
.THURSDAY NIGHT...West gales to 45 knots becoming northwest gales
to 35 knots after midnight. Heavy freezing spray. Numerous snow
showers in the evening. Isolated snow showers after midnight.
Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.FRIDAY...West winds 20 to 30 knots diminishing to 15 to 25 knots
in the afternoon. Heavy freezing spray in the morning. Scattered
snow showers. Waves subsiding to 2 to 4 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots becoming northwest 10 to
20 knots. A chance of snow. Waves building to 1 to 3 feet.
.SUNDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of snow showers. Waves subsiding to calm to
2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-051700-
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-
346 AM EST Wed Feb 5 2025

...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
MORNING...

.EARLY THIS MORNING...Northwest winds 15 to 25 knots. Freezing
spray. Waves 3 to 6 feet occasionally to 8 feet.
.TODAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots by late morning, then becoming south 10 to 20 knots by
mid afternoon. Waves subsiding to 1 to 3 feet.
.TONIGHT...South winds 10 to 20 knots increasing to 20 to
30 knots by midnight. A slight chance of snow in the evening,
then snow after midnight. Waves subsiding to calm to 2 feet, then
building to 5 to 8 feet occasionally to 10 feet.
.THURSDAY...South winds 20 to 30 knots becoming west gales to
45 knots by late morning, then increasing to gales to 45 knots
with a few storm force gusts to 50 knots possible by mid
afternoon. Snow. Freezing spray in the afternoon. Waves building
to 15 to 20 feet occasionally to 25 feet.
.THURSDAY NIGHT...Northwest gales to 45 knots. Heavy freezing
spray. Snow showers in the evening. Scattered snow showers after
midnight. Waves building to 17 to 22 feet occasionally to
28 feet, then subsiding to 11 to 15 feet occasionally to 19 feet.
.FRIDAY...West winds 20 to 30 knots diminishing to 15 to 25 knots
in the afternoon. Freezing spray. Scattered snow showers. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Freezing spray in the evening.
Waves subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 5 to 15 knots becoming north 10 to
20 knots. A chance of snow. Waves subsiding to calm to 2 feet,
then building to 2 to 4 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west. A chance
of snow showers. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-051700-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
346 AM EST Wed Feb 5 2025

...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
MORNING...

.EARLY THIS MORNING...Northwest winds 15 to 25 knots. Freezing
spray. Isolated snow showers. Waves 3 to 6 feet occasionally to
8 feet.
.TODAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots by late morning, then backing southwest by mid
afternoon. Isolated snow showers in the morning. Waves subsiding
to 1 to 3 feet.
.TONIGHT...South winds 10 to 20 knots increasing to 20 to
30 knots. Snow likely after midnight. Waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...South winds 20 to 30 knots becoming southwest gales
to 35 knots by late morning, then becoming west gales to 45 knots
by mid afternoon. Snow showers. Freezing spray in the afternoon.
Waves building to 15 to 20 feet occasionally to 25 feet.
.THURSDAY NIGHT...West gales to 45 knots with a few storm force
gusts up to 50 knots possible becoming northwest gales to 40
knots after midnight. Freezing spray. Snow showers. Waves building
to 17 to 22 feet occasionally to 28 feet, then subsiding to 11 to
15 feet occasionally to 19 feet.
.FRIDAY...Northwest gales to 35 knots becoming west 20 to
30 knots in the afternoon. Freezing spray. Numerous snow showers
in the morning. Scattered snow showers in the afternoon. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.FRIDAY NIGHT...West winds 20 to 30 knots becoming northwest
10 to 20 knots after midnight. Freezing spray in the evening.
Scattered snow showers. Waves subsiding to 2 to 4 feet.
.SATURDAY...South winds 10 to 20 knots backing north. A chance of
snow. Waves subsiding to calm to 2 feet, then building to 2 to
4 feet.
.SUNDAY...Northwest winds 15 to 25 knots backing west. A chance
of snow showers. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-051700-
MAFOR 0510/
Superior West 11710 11600 11500 11310 11320 11330 12437. Waves 2
feet or less today. Waves 1 to 2 feet building to 3 to 5 feet
tonight.

Superior North Central 12720 11610 11510 11410 11430 12447. Waves
2 to 4 feet subsiding to 1 to 2 feet today. Waves 1 to 2 feet
building to 4 to 7 feet tonight.

Superior South Central 12720 11610 11410 11320 11430 12437. Waves
3 to 5 feet subsiding to 1 to 3 feet today. Waves 1 to 3 feet
building to 3 to 5 feet tonight.

Superior East 11730 11720 12610 11510 11420 11430 11437. Waves 3
to 6 feet subsiding to 2 to 3 feet today. Waves 2 to 4 feet
building to 3 to 6 feet tonight.

$$

TAP

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

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