671
FZUS63 KMQT 010900
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM EST Sun Mar 1 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...

This morning an extensive area of high pressure was centered at 30.7
inches over northern MN and far southwest Ontario. This high will
shift east today, encompassing all of the Great Lakes at 30.5
inches. The high will shift east on Monday as a 29.9 inch low moves
from the Canadian Prairies to James Bay, deepening to 29.7 inches.
The low will drag a weak trough of 30.2 inches across Lake Superior
Monday night before weak ridging builds over the lake on Tuesday as
another, more compact high of 30.4 inches moves to James Bay.
Another large area of high pressure will move into central and
eastern Canada by Thursday morning. The strong high will help keep a
29.7 inch low moving up from the Southern Plains to our south as it
weakens to 29.9 inches by the time it reaches the Lower Great Lakes
Wednesday night, dissipating thereafter.


LSZ162-012100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 AM EST Sun Mar 1 2026 /300 AM CST Sun Mar 1 2026/

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...Northwest winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south by
midnight. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet.
.MONDAY NIGHT...Southwest gales to 35 knots. Waves subsiding to
calm to 2 feet.
.TUESDAY...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots becoming east 15 to
25 knots. Waves building to 1 to 3 feet.
.THURSDAY...East winds 15 to 25 knots backing northeast. A chance
of rain showers, possibly mixed with freezing rain. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.

$$

LSZ263-012100-
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 AM EST Sun Mar 1 2026

...GALE WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY
EVENING...

.EARLY THIS MORNING...North winds 5 to 15 knots. A slight chance
of snow showers. Waves calm to 2 feet.
.TODAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. A slight chance of snow showers in the morning. Waves
calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots backing south by
midnight. Waves building to 1 to 3 feet.
.MONDAY...South winds 5 to 15 knots becoming southwest 10 to
20 knots. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...Southwest gales to 35 knots. Waves subsiding to
calm to 2 feet.
.TUESDAY...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 20 to 30 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 20 to 30 knots backing east. Waves
building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...East winds 20 to 30 knots becoming northeast 15 to
25 knots. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.

$$

LSZ264-012100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 AM EST Sun Mar 1 2026

...GALE WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY
EVENING...

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. A slight
chance of snow showers. Waves 1 to 3 feet.
.TODAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves subsiding to calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots backing southwest late. Waves
building to 1 to 3 feet.
.MONDAY...Southwest winds 10 to 20 knots. Freezing spray in the
morning. Waves building to 5 to 9 feet occasionally to 11 feet.
.MONDAY NIGHT...Southwest gales to 35 knots. Waves subsiding to
1 to 3 feet.
.TUESDAY...Southwest gales to 35 knots becoming west 15 to
25 knots in the afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...West gales to 35 knots. Waves calm to 2 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots veering east. Waves
building to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...East winds 20 to 30 knots diminishing to 15 to
25 knots. Waves subsiding to 3 to 6 feet occasionally to 8 feet,
then building to 5 to 8 feet occasionally to 10 feet.

$$

LSZ265-012100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 AM EST Sun Mar 1 2026

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. A slight
chance of snow showers. Waves 1 to 3 feet.
.TODAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. Waves subsiding to calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots backing southwest by
midnight. Waves calm to 2 feet.
.MONDAY...Southwest winds 15 to 25 knots backing south by late
morning, then diminishing to 10 to 20 knots by mid afternoon.
Waves building to 2 to 4 feet, then subsiding to calm to 2 feet.
.MONDAY NIGHT...South winds 20 to 30 knots becoming southwest
gales to 35 knots after midnight. Waves calm to 2 feet.
.TUESDAY...Southwest gales to 35 knots diminishing to 20 to
30 knots in the afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...West gales to 35 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 20 to 30 knots backing south. Waves
building to 2 to 4 feet.
.THURSDAY...East winds 20 to 30 knots diminishing to 15 to
25 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.

$$

LSZ266-012100-
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 AM EST Sun Mar 1 2026

...GALE WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY
EVENING...

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. A chance of
snow showers. Waves 2 to 4 feet.
.TODAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. A chance of snow showers. Waves subsiding to 1 to
3 feet.
.TONIGHT...West winds 10 to 20 knots becoming southwest 15 to
25 knots late. Waves building to 2 to 4 feet.
.MONDAY...Southwest winds 15 to 25 knots backing south. Freezing
spray in the morning. Waves building to 6 to 10 feet occasionally
to 13 feet.
.MONDAY NIGHT...South gales to 35 knots veering southwest after
midnight. Waves subsiding to 2 to 4 feet.
.TUESDAY...Southwest gales to 35 knots diminishing to 20 to
30 knots in the afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...West gales to 35 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 20 to 30 knots backing south. Waves
building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...East winds 20 to 30 knots. Waves subsiding to 2 to
4 feet, then building to 5 to 8 feet occasionally to 10 feet.

$$

LSZ267-012100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 AM EST Sun Mar 1 2026

...GALE WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY
EVENING...

.EARLY THIS MORNING...Northeast winds 10 to 20 knots. A chance of
snow showers. Waves 2 to 4 feet.
.TODAY...North winds 5 to 15 knots veering southeast by late
morning, then veering west by mid afternoon. A chance of snow
showers. Waves subsiding to calm to 2 feet, then building to 1 to
3 feet.
.TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots
by midnight. A slight chance of snow showers in the evening.
Waves building to 2 to 4 feet.
.MONDAY...South winds 10 to 20 knots. Waves building to 5 to
9 feet occasionally to 11 feet.
.MONDAY NIGHT...South winds 20 to 30 knots. Waves subsiding to
2 to 4 feet.
.TUESDAY...South winds 20 to 30 knots becoming southwest 15 to
25 knots in the afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 20 to 30 knots becoming west
gales to 35 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...West winds 20 to 30 knots backing south. Waves
building to 2 to 4 feet.
.THURSDAY...East winds 20 to 30 knots diminishing to 15 to
25 knots. Waves subsiding to 1 to 3 feet, then building to 3 to
6 feet occasionally to 8 feet.

$$

LSZ261-011500-
MAFOR 0110/
Superior West 11810 12700 11600 11500 11300 12400. Waves 2 feet
or less.

Superior North Central 13710 14610 11510. Waves 1 to 3 feet. Wave
heights are for ice free areas.

Superior South Central 11720 11710 11720 11620 12610 12520. A
chance of snow showers early this morning. Waves 2 to 4 feet
subsiding to 1 to 3 feet today. Waves 2 feet or less tonight.
Wave heights are for ice free areas.

Superior East 12110 11100 11710 12610 11520 11420. A chance of
snow showers today and this evening. Waves 2 to 4 feet subsiding
to 1 to 3 feet today. Waves 2 to 3 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