431
FZUS63 KMQT 022100
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EST Mon Mar 2 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 30.6 high currently centered over Lake Ontario continues to shift
east today as a 29.7 inch low over northern Manitoba moves east over
Hudson Bay, deepening to 29.6 inches. The low drags a weak trough of
30.2 inches over Lake Superior tonight 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.


LSZ162-030900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EST Mon Mar 2 2026 /300 PM CST Mon Mar 2 2026/

.LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TONIGHT...Southwest winds 15 to 25 knots diminishing to 5 to
15 knots by midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing east by late
morning, then veering west by mid afternoon. A slight chance of
snow showers. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots backing southwest late.
Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots becoming south 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots backing northeast
after midnight. Waves calm to 2 feet.
.THURSDAY...Northeast winds 15 to 25 knots. Waves building to
2 to 4 feet.
.THURSDAY NIGHT...Northeast winds 10 to 20 knots becoming east
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.FRIDAY...East winds 5 to 15 knots backing north. A chance of
rain showers. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots becoming southwest 20 to
30 knots. Waves building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ263-030900-
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 Mon Mar 2 2026

...GALE WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING...

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

$$

LSZ264-030900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EST Mon Mar 2 2026

...GALE WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING...

.LATE THIS AFTERNOON...Southwest gales to 35 knots. Waves 5 to
8 feet occasionally to 10 feet.
.TONIGHT...Southwest winds 20 to 30 knots becoming west 10 to
20 knots by midnight, then diminishing to 5 to 15 knots late. A
slight chance of freezing rain after midnight. Waves subsiding to
calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots veering east. A slight
chance of freezing rain and snow showers. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 knots. Waves building
to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Northeast winds 10 to 20 knots veering east in the
afternoon. Waves building to 3 to 6 feet occasionally to 8 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 becoming north 15 to
25 knots. A chance of rain showers. Waves subsiding to 1 to
3 feet, then building to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...Northwest winds 15 to 25 knots becoming southwest
gales to 35 knots. Waves subsiding to 2 to 4 feet, then building
to 5 to 8 feet occasionally to 10 feet.

$$

LSZ265-030900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EST Mon Mar 2 2026

.LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. Waves calm
to 2 feet.
.TONIGHT...Southwest winds 10 to 20 knots. A slight chance of
freezing rain after midnight. Waves calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots backing south by late
morning, then veering southwest by mid afternoon. A slight chance
of freezing rain and snow showers. A slight chance of rain
showers in the afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots becoming southeast
10 to 20 knots in the afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots backing
northeast after midnight. Waves building to 1 to 3 feet.
.THURSDAY...East winds 10 to 20 knots. Waves building to 2 to
4 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots becoming southeast
10 to 20 knots after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...Southeast winds 10 to 20 knots becoming northwest 15 to
25 knots. A chance of rain showers. Waves subsiding to calm to
2 feet, then building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Northwest 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.

$$

LSZ266-030900-
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 Mon Mar 2 2026

...GALE WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING...

.LATE THIS AFTERNOON...Southwest gales to 35 knots. Waves 5 to
8 feet occasionally to 10 feet.
.TONIGHT...Southwest winds 20 to 30 knots diminishing to 10 to
20 knots. A slight chance of freezing rain after midnight. Waves
subsiding to 2 to 4 feet.
.TUESDAY...Southwest winds 10 to 20 knots. A slight chance of
freezing rain in the morning. A slight chance of snow showers. A
slight chance of rain showers in the afternoon. Waves subsiding
to calm to 2 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots. A slight chance of
rain showers in the evening. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots backing south in the
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots backing east after
midnight. Waves building to 2 to 4 feet.
.THURSDAY...East winds 15 to 25 knots. Waves building to 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 becoming south 20 to
30 knots. A chance of rain showers, then rain showers likely.
Waves subsiding to 1 to 3 feet, then building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...Northwest winds 20 to 30 knots becoming southwest
gales to 35 knots. Waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 3 to 5 feet occasionally to 7 feet.

$$

LSZ267-030900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EST Mon Mar 2 2026

...GALE WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING...

.LATE THIS AFTERNOON...Southwest gales to 35 knots. Waves 4 to
8 feet occasionally to 10 feet.
.TONIGHT...Southwest winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to 2 to 4 feet.
.TUESDAY...Southwest winds 10 to 20 knots backing south by late
morning, then veering southwest by mid afternoon. A slight chance
of freezing rain in the morning. A chance of rain and snow
showers. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots veering west by
midnight, then diminishing to 5 to 15 knots late. A slight chance
of rain showers, 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 in the afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots backing east after
midnight. 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. Waves building to
2 to 4 feet.
.FRIDAY...Southeast winds 15 to 25 knots. A chance of rain
showers, then rain showers likely. Waves subsiding to calm to
2 feet, then building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Northwest winds 15 to 25 knots becoming west 20 to
30 knots. A chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ261-030300-
MAFOR 0222/
Superior West...GALE WARNING IN EFFECT...11530 11520 12510 11500
11400 11200 11300. Waves 2 to 4 feet subsiding to 1 foot or less
tonight. Waves 1 foot or less Tuesday. Wave heights are for ice
free areas.

Superior North Central...GALE WARNING IN EFFECT...11550 11640
11620 11610 11710 11100 12210. Waves 5 to 8 feet subsiding to 2
to 4 feet tonight. Waves 1 to 2 feet Tuesday. Wave heights are
for ice free areas.

Superior South Central...GALE WARNING IN EFFECT...11530 12520
12510 12410 11510. Waves 2 to 4 feet subsiding to 1 to 3 feet
tonight. Waves 2 feet or less Tuesday. Wave heights are for ice
free areas.

Superior East...GALE WARNING IN EFFECT...12540 11530 12520 13510.
A chance of rain showers Tuesday morning. Waves 5 to 8 feet
subsiding to 3 to 5 feet tonight. Waves 2 to 4 feet subsiding to
1 to 2 feet Tuesday.

$$

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