197
FZUS63 KMQT 310907
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
407 AM EST Fri Jan 31 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...As 30.5 inch high pressure over Saskatchewan drops
southeast, reaching southern Manitoba this evening, a 29.7 inch low
pressure over Missouri will track to the Mid-Atlantic States. The
high will then pass just north of Lake Superior during tonight. As
the high shifts to the Lower Great Lakes by Saturday evening, broad
29.7 inch low pressure will emerge over the Northern Plains. This
low will then track east-northeast, passing just north of Lake
Superior during Sunday night at a pressure of 29.6 inches. As the
low tracks to the Canadian Maritimes by Monday evening, 30.8 inch
high pressure over the southern Canadian Rockies will extend 30.2
inch ridging to the Great Lakes. As the high remains nearly
stationary and weakens to 30.7 inches on Tuesday, the ridge will
build to 30.4 inches as it lifts north into the northern portion of
the Great Lakes region.

LSZ162-311715-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
407 AM EST Fri Jan 31 2025 /307 AM CST Fri Jan 31 2025/

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

Note, wave height forecasts are for ice free areas.

$$

LSZ263-311715-
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-
407 AM EST Fri Jan 31 2025

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet building to 1 to 3 feet.
.TODAY...Northeast winds 10 to 20 knots becoming north 15 to
25 knots by late morning, then diminishing to 10 to 20 knots by
mid afternoon. Isolated snow showers. Waves building to 3 to
6 feet occasionally to 8 feet.
.TONIGHT...North winds 10 to 20 knots veering northeast by
midnight, then diminishing to 5 to 15 knots late. Waves subsiding
to 1 to 3 feet.
.SATURDAY...East winds 10 to 20 knots veering southeast by late
morning, then increasing to 20 to 30 knots by mid afternoon. Snow
showers likely in the afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY NIGHT...Southeast winds 20 to 30 knots. Snow showers.
Waves building to 5 to 9 feet occasionally to 11 feet.
.SUNDAY...South winds 15 to 25 knots veering southwest in the
afternoon. A chance of snow showers. Waves subsiding to 2 to
4 feet.
.SUNDAY NIGHT...West gales to 40 knots. Freezing spray after
midnight. Waves building to 7 to 10 feet occasionally to 13 feet.
.MONDAY...West gales to 35 knots becoming northwest 10 to
20 knots. Freezing spray. Waves subsiding to 2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. A chance of snow showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-311715-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
407 AM EST Fri Jan 31 2025

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet building to 1 to 3 feet.
.TODAY...North winds 15 to 25 knots. Isolated snow showers in the
morning. Waves building to 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. Waves subsiding to 1 to
3 feet.
.SATURDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots by late morning, then increasing to 15 to 25 knots by
mid afternoon. A chance of snow showers in the afternoon. Waves
subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY NIGHT...Southeast gales to 35 knots. Freezing spray in
the evening. Snow showers. Waves building to 7 to 11 feet
occasionally to 14 feet.
.SUNDAY...South winds 20 to 30 knots becoming southwest 15 to
25 knots in the afternoon. A chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.SUNDAY NIGHT...West gales to 40 knots. Freezing spray after
midnight. Waves building to 7 to 10 feet occasionally to 13 feet.
.MONDAY...Northwest gales to 35 knots diminishing to 10 to
20 knots. Freezing spray. Waves subsiding to 2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. A chance of snow showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-311715-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
407 AM EST Fri Jan 31 2025

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...North winds 10 to 20 knots increasing to 20 to 30 knots.
Isolated snow showers. Waves building to 3 to 6 feet occasionally
to 8 feet.
.TONIGHT...North winds 20 to 30 knots diminishing to 10 to
20 knots by midnight. Freezing spray in the evening. A slight
chance of snow showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet.
.SATURDAY...East winds 10 to 20 knots becoming southeast 15 to
25 knots by late morning, then increasing to 20 to 30 knots by
mid afternoon. A chance of snow showers in the afternoon. Waves
subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY NIGHT...Southeast winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Freezing spray. Snow showers.
Waves building to 5 to 9 feet occasionally to 11 feet.
.SUNDAY...South winds 15 to 25 knots becoming southwest 10 to
20 knots in the afternoon. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.SUNDAY NIGHT...West gales to 40 knots. A chance of snow showers.
Freezing spray after midnight. Waves building to 5 to 8 feet
occasionally to 10 feet.
.MONDAY...West winds 20 to 30 knots becoming northwest 15 to
25 knots. Heavy freezing spray. Waves subsiding to 2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots backing west. A chance
of snow showers. Waves subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-311715-
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-
407 AM EST Fri Jan 31 2025

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northeast winds 10 to 20 knots becoming north 15 to
25 knots by late morning, then increasing to 20 to 30 knots by
mid afternoon. Isolated snow showers. Waves building to 4 to
7 feet occasionally to 9 feet.
.TONIGHT...North winds 20 to 30 knots diminishing to 10 to
20 knots. Freezing spray in the evening. A slight chance of snow
showers. Waves subsiding to 2 to 4 feet.
.SATURDAY...Northeast winds 10 to 20 knots veering southeast by
late morning, then increasing to 15 to 25 knots by mid afternoon.
A chance of snow showers in the afternoon. Waves subsiding to
calm to 2 feet, then building to 3 to 5 feet occasionally to
7 feet.
.SATURDAY NIGHT...Southeast gales to 35 knots diminishing to
20 to 30 knots after midnight. Freezing spray. Snow showers.
Waves building to 7 to 11 feet occasionally to 14 feet.
.SUNDAY...South winds 20 to 30 knots diminishing to 10 to
20 knots in the afternoon. Snow showers likely in the morning,
then a chance of snow showers in the afternoon. Waves subsiding
to 3 to 5 feet occasionally to 7 feet.
.SUNDAY NIGHT...Southwest gales to 35 knots becoming west gales
to 40 knots after midnight. A chance of snow showers. Freezing
spray after midnight. Waves building to 9 to 12 feet occasionally
to 15 feet.
.MONDAY...Northwest gales to 35 knots diminishing to 15 to
25 knots. Freezing spray. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...Northwest winds 10 to 20 knots backing west. Freezing
spray. A chance of snow showers. Waves subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-311715-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
407 AM EST Fri Jan 31 2025

.EARLY THIS MORNING...Northeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TODAY...Northeast winds 10 to 20 knots backing north by late
morning, then increasing to 15 to 25 knots by mid afternoon.
Isolated snow showers in the afternoon. Waves building to 3 to
5 feet occasionally to 7 feet.
.TONIGHT...North winds 15 to 25 knots becoming northeast 10 to
20 knots late. A slight chance of snow showers. Waves building to
3 to 6 feet occasionally to 8 feet, then subsiding to 2 to
4 feet.
.SATURDAY...East winds 10 to 20 knots veering southeast by late
morning, then increasing to 15 to 25 knots by mid afternoon. A
slight chance of snow showers in the afternoon. Waves subsiding
to calm to 2 feet, then building to 1 to 3 feet.
.SATURDAY NIGHT...Southeast winds 20 to 30 knots increasing to
gales to 35 knots after midnight. Freezing spray. Snow showers.
Waves building to 6 to 9 feet occasionally to 11 feet.
.SUNDAY...Southeast winds 20 to 30 knots becoming south 15 to
25 knots in the afternoon. Freezing spray in the morning. Snow
showers in the morning, then a chance of snow showers in the
afternoon. Waves subsiding to 2 to 4 feet.
.SUNDAY NIGHT...Southwest gales to 35 knots veering west after
midnight. A chance of snow showers. Freezing spray after
midnight. Waves building to 9 to 12 feet occasionally to 15 feet.
.MONDAY...Northwest gales to 35 knots diminishing to 15 to
25 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...Northwest winds 10 to 20 knots backing west. Freezing
spray. A chance of snow showers. Waves subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-311715-
MAFOR 3110/
Superior West 13120 12820 12120 11210. Waves 1 to 5 feet.

Superior North Central 11120 11820 12830 12842 11830 11820. Waves
2 to 3 feet building to 5 to 7 feet today then subsiding to 2 to
4 feet tonight.

Superior South Central 11100 11120 11820 11830 11832 11830 11820
11810. Waves 1 to 3 feet building to 3 to 6 feet today. Waves 3 to
7 feet tonight.

Superior East 12110 11120 13830 11820 11120. Waves 2 to 6 feet.

$$

Rolfson

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

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