723
FZUS63 KMQT 030300
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 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...

Weak 30.1 inch trough over the lake tonight gives way to 30.2 inch
ridging into Tuesday morning as a more compact high of 30.4 inches
moves to James Bay. A weak 30.1 inch trough develops Tuesday
afternoon and evening. Another large area of high pressure will move
into central and eastern Canada Wednesday into 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. Friday, low pressure ejects out of the Plains, reaching
Lake Superior Saturday morning at least at 29.8 inches.


LSZ162-030900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EST Mon Mar 2 2026 /900 PM CST Mon Mar 2 2026/

.REST OF TONIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots by midnight. Waves 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.
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-
1000 PM EST Mon Mar 2 2026

.REST OF TONIGHT...Southwest winds 5 to 15 knots. A slight chance
of snow showers after midnight. Waves 2 to 4 feet 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. 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-
1000 PM EST Mon Mar 2 2026

.REST OF TONIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots late. A slight chance of freezing rain after midnight.
Waves 3 to 6 feet occasionally to 8 feet subsiding to calm to
2 feet.
.TUESDAY...Northeast winds 5 to 15 knots veering east. 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 6 feet occasionally to 8 feet.
.THURSDAY...Northeast winds 10 to 20 knots veering east 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 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-
1000 PM EST Mon Mar 2 2026

.REST OF 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. 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-
1000 PM EST Mon Mar 2 2026

.REST OF TONIGHT...Southwest winds 20 to 30 knots diminishing to
10 to 20 knots. A slight chance of freezing rain after midnight.
Waves 3 to 6 feet occasionally to 8 feet 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.
Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots. 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-
1000 PM EST Mon Mar 2 2026

.REST OF TONIGHT...Southwest winds 20 to 30 knots diminishing to
10 to 20 knots. Waves 3 to 6 feet occasionally to 8 feet
subsiding to 2 to 4 feet.
.TUESDAY...Southwest winds 10 to 20 knots backing south by late
morning, then veering southwest by mid afternoon. 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. 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.

$$

LSZ261-030900-
MAFOR 0304/
Superior West 12510 11500 11400 11200 11300 12600. Waves 2 feet
or less. Wave heights are for ice free areas.

Superior North Central 11620 11610 11710 11100 12210 11710 11600.
Waves 3 to 5 feet subsiding to 2 to 4 feet overnight. Waves 1 to
2 feet Tuesday and Tuesday evening. Wave heights are for ice free
areas.

Superior South Central 11520 12510 12410 11510 11500 11600. Waves
1 to 3 feet overnight. Waves 2 feet or less Tuesday and Tuesday
evening. Wave heights are for ice free areas.

Superior East 11540 12520 14510 11610. Waves 3 to 6 feet
overnight. Waves 2 to 4 feet subsiding to 1 to 2 feet Tuesday.
Waves 1 to 2 feet Tuesday evening.

$$

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