062
FZUS63 KMQT 032100
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EST Tue Mar 3 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...

A 30.1 inch trough will remain over the lake this afternoon with
ridging of 30.2 inches building in tonight. A 30.6 inch high will
move from northern Manitoba Wednesday to Quebec Thursday morning,
building to 30.7 inches late. The strong high will help keep a 29.9
inch low moving up from the Southern Plains to the south of the
Lower Great Lakes Wednesday night, wewakening to 30.1 inches by
Thursday night. Friday, a low pressure ejects out of the Plains,
reaching Lake Superior Saturday morning at least at 29.7 inches.
Behind the low, a 29.9 inch ridge builds over the lake on Saturday
night before a 29.1 inch low moves through northern Ontario on
Sunday.


LSZ162-040900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EST Tue Mar 3 2026 /300 PM CST Tue Mar 3 2026/

.LATE THIS AFTERNOON...West winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...West winds 5 to 15 knots backing southwest by
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots backing northeast
by midnight, then increasing to 15 to 25 knots late. Waves calm
to 2 feet.
.THURSDAY...Northeast winds 15 to 25 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. A chance of rain showers in the morning, then
rain showers likely in the afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 10 to 20 knots backing north
after midnight. A chance of rain showers. A chance of snow
showers after midnight. Waves calm to 2 feet.
.SATURDAY...West winds 15 to 25 knots becoming southwest 20 to
30 knots. Waves calm to 2 feet.
.SUNDAY...Southwest winds 15 to 25 knots veering west. Waves calm
to 2 feet.

$$

LSZ263-040900-
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-
400 PM EST Tue Mar 3 2026

.LATE THIS AFTERNOON...West winds 5 to 15 knots. A slight chance
of rain showers, freezing rain and snow showers. Waves calm to
2 feet.
.TONIGHT...West winds 15 to 25 knots backing southwest by
midnight. Waves calm to 2 feet.
.WEDNESDAY...South winds 15 to 25 knots becoming southwest 10 to
20 knots by late morning, then diminishing to 5 to 15 knots by
mid afternoon. Patchy fog in the morning. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 15 to 25 knots. Waves building
to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Northeast winds 15 to 25 knots. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots becoming southeast
5 to 15 knots after midnight. Waves subsiding to 2 to 4 feet.
.FRIDAY...Southeast winds 5 to 15 knots backing east in the
afternoon. Rain showers likely in the afternoon. Waves subsiding
to 1 to 3 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots becoming north 10 to
20 knots after midnight. A chance of rain showers. A chance of
snow showers after midnight. Waves building to 2 to 4 feet.
.SATURDAY...West winds 15 to 25 knots becoming southwest 20 to
30 knots. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.
.SUNDAY...Southwest winds 20 to 30 knots becoming west 15 to
25 knots. Waves subsiding to calm to 2 feet.

$$

LSZ264-040900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EST Tue Mar 3 2026

.LATE THIS AFTERNOON...North winds 5 to 15 knots. A slight chance
of rain showers, freezing rain and snow showers. Waves calm to
2 feet.
.TONIGHT...North winds 5 to 15 knots diminishing to less than
10 knots by midnight, then backing west late. Waves calm to
2 feet.
.WEDNESDAY...South winds 5 to 15 knots veering southwest by mid
afternoon. Patchy fog in the morning. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 knots increasing to
15 to 25 knots by midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.THURSDAY...East winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots veering southeast
after midnight. Waves 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Southeast winds 10 to 20 knots. A chance of rain
showers in the afternoon. Waves subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight. A chance of rain showers. A chance
of snow showers after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...Northwest winds 15 to 25 knots becoming southwest
20 to 30 knots. Waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Southwest winds 20 to 30 knots becoming west 15 to
25 knots. Waves subsiding to 4 to 8 feet occasionally to 10 feet.

$$

LSZ265-040900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EST Tue Mar 3 2026

.LATE THIS AFTERNOON...West winds 10 to 20 knots. A slight chance
of rain and snow showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots becoming west 5 to
15 knots late. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots increasing to 10 to
20 knots. Patchy fog in the morning. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots backing
northeast by midnight. Waves building to 1 to 3 feet.
.THURSDAY...East winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots veering southeast
after midnight. Waves subsiding to 2 to 4 feet.
.FRIDAY...Southeast winds 15 to 25 knots. A chance of rain
showers in the afternoon. Waves subsiding to 1 to 3 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots veering west after
midnight. Rain showers likely in the evening, then a chance of
rain showers after midnight. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 20 to 30 knots backing southwest.
Waves building to 2 to 4 feet, then subsiding to calm to 2 feet.
.SUNDAY...Southwest winds 20 to 30 knots veering west. Waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet.

$$

LSZ266-040900-
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-
400 PM EST Tue Mar 3 2026

.LATE THIS AFTERNOON...West winds 10 to 20 knots. A slight chance
of rain and snow showers. Waves calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots veering northwest by
midnight, then backing west late. A slight chance of rain showers
in the evening. Waves calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots. Patchy fog in the
morning. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots by midnight, then backing east late. Waves building to
3 to 5 feet occasionally to 7 feet.
.THURSDAY...East winds 15 to 25 knots. Waves 3 to 5 feet
occasionally to 7 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots veering southeast
after midnight. Waves 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Southeast winds 15 to 25 knots. A chance of rain
showers in the afternoon. Waves subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots becoming west
20 to 30 knots after midnight. Rain showers likely. Waves
building to 4 to 7 feet occasionally to 9 feet.
.SATURDAY...Northwest winds 20 to 30 knots backing southwest.
Waves building to 5 to 8 feet occasionally to 10 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Southwest winds 20 to 30 knots veering west. Waves
subsiding to 5 to 8 feet occasionally to 10 feet, then building
to 8 to 11 feet occasionally to 14 feet.

$$

LSZ267-040900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EST Tue Mar 3 2026

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. A slight
chance of rain and snow showers. Waves calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots
late. A slight chance of rain showers, possibly mixed with
freezing rain and snow showers in the evening. Waves calm to
2 feet.
.WEDNESDAY...South winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots backing southeast
late. Waves building to 1 to 3 feet.
.THURSDAY...East winds 10 to 20 knots. Waves 1 to 3 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots veering southeast
after midnight. Waves 1 to 3 feet.
.FRIDAY...Southeast winds 15 to 25 knots. A chance of rain
showers in the afternoon. Waves 1 to 3 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots veering south
after midnight. Rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...West winds 15 to 25 knots becoming southwest 20 to
30 knots. A chance of rain showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY...Southwest winds 20 to 30 knots veering west. A chance
of rain showers, possibly mixed with snow. Waves subsiding to
5 to 8 feet occasionally to 10 feet, then building to 8 to
11 feet occasionally to 14 feet.

$$

LSZ261-040300-
MAFOR 0322/
Superior West 11610 12600 14500 11510. Waves omitted due to the
lake being mostly ice covered.

Superior North Central 11810 11800 12700 11500 11400 11410 11510.
Waves 2 feet or less. Wave heights are for ice free areas.

Superior South Central 11610 12700 11600 11500 11400 12410. Waves
1 foot or less. Wave heights are for ice free areas.

Superior East 12610 11710 11700 11600 11500 12410. Waves 1 to 2
feet.

$$

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