650
FZUS63 KMQT 030900
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM 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 today with ridging of
30.2 inches building in tonight. A 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 29.6 inches
by the time it reaches the Lower Great Lakes Wednesday night,
dissipating thereafter. On Friday low pressure ejects out of the
Plains, reaching Lake Superior Saturday morning at least at 29.8
inches. Behind the low a 29.9 inch ridge builds over the lake on
Saturday night before a stronger, 29.2 inch, low moves through
central Ontario on Sunday.


LSZ162-032100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 AM EST Tue Mar 3 2026 /300 AM CST Tue Mar 3 2026/

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Southwest winds 5 to 15 knots becoming west 10 to
20 knots by mid afternoon. A slight chance of snow showers in the
morning. A slight chance of drizzle and freezing drizzle. Waves
calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots backing southwest by
midnight. A slight chance of snow showers in the evening. Waves
calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots by late morning, then backing south by mid afternoon.
Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots becoming northeast
15 to 25 knots after midnight. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.
.THURSDAY...Northeast winds 15 to 25 knots. Waves building to
2 to 4 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet.
.FRIDAY...East winds 5 to 15 knots becoming north 10 to 20 knots.
Rain showers likely, then a chance of rain showers. Waves
subsiding to calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots becoming southwest gales to
35 knots. Waves building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ263-032100-
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 Tue Mar 3 2026

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

$$

LSZ264-032100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 AM EST Tue Mar 3 2026

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves 1 to
3 feet.
.TODAY...West winds 5 to 15 knots veering north by mid afternoon.
A slight chance of snow showers and freezing drizzle. Waves
subsiding to calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots backing northwest by
midnight, then backing southwest late. A slight chance of
freezing drizzle and snow showers in the evening. Waves calm to
2 feet.
.WEDNESDAY...South winds 5 to 15 knots veering southwest. Waves
calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 15 to 25 knots. Heavy freezing
spray after midnight. Waves building to 3 to 6 feet occasionally
to 8 feet.
.THURSDAY...East winds 15 to 25 knots. Heavy freezing spray in
the morning. 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 20 to
30 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...North winds 20 to 30 knots becoming southwest gales
to 40 knots. Waves subsiding to 2 to 4 feet, then building to
5 to 8 feet occasionally to 10 feet.

$$

LSZ265-032100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 AM EST Tue Mar 3 2026

.EARLY THIS MORNING...Southwest winds 10 to 20 knots. Waves calm
to 2 feet.
.TODAY...Southwest winds 10 to 20 knots veering west by mid
afternoon. A slight chance of freezing drizzle in the morning. A
slight chance of drizzle and snow showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots backing west by
midnight. A slight chance of freezing drizzle and snow showers in
the evening. Waves calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 knots. Waves building
to 2 to 4 feet, then subsiding to 1 to 3 feet.
.THURSDAY...East winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...Southeast winds 15 to 25 knots. Waves building
to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Southeast winds 10 to 20 knots becoming south 20 to
30 knots. Rain showers likely. Waves subsiding to calm to 2 feet,
then building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Northwest winds 20 to 30 knots becoming southwest
gales to 35 knots. Waves subsiding to calm to 2 feet, then
building to 2 to 4 feet.

$$

LSZ266-032100-
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 Tue Mar 3 2026

.EARLY THIS MORNING...Southwest winds 10 to 20 knots. Waves 2 to
4 feet.
.TODAY...Southwest winds 10 to 20 knots. A slight chance of
freezing drizzle in the morning. A slight chance of drizzle and
snow showers. Waves subsiding to calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots veering northwest by
midnight, then backing west late. A slight chance of drizzle,
freezing drizzle and snow showers in the evening. Waves calm to
2 feet.
.WEDNESDAY...South winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 15 to 25 knots. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.THURSDAY...East winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY NIGHT...Southeast winds 15 to 25 knots. Waves 3 to
5 feet occasionally to 7 feet.
.FRIDAY...Southeast winds 15 to 25 knots becoming south 20 to
30 knots. Rain showers likely. Waves subsiding to 1 to 3 feet,
then building to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...Northwest gales to 35 knots becoming southwest gales
to 40 knots. Waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 3 to 5 feet occasionally to 7 feet.

$$

LSZ267-032100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 AM EST Tue Mar 3 2026

.EARLY THIS MORNING...Southwest winds 10 to 20 knots. Waves 2 to
4 feet.
.TODAY...Southwest winds 10 to 20 knots. A slight chance of
freezing drizzle in the morning. A slight chance of drizzle and
snow showers. Waves subsiding to calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots
late. A slight chance of drizzle and snow showers in the evening.
Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots becoming south 10 to
20 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots becoming east
15 to 25 knots after midnight. Waves building to 1 to 3 feet.
.THURSDAY...East winds 15 to 25 knots. Waves 1 to 3 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots veering southeast
after midnight. Waves building to 2 to 4 feet.
.FRIDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots. Rain showers likely. Waves subsiding to calm to 2 feet,
then building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Northwest winds 20 to 30 knots becoming southwest
gales to 35 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.

$$

LSZ261-031500-
MAFOR 0310/
Superior West 11510 12500 11600 12700 12500. Waves 2 feet or
less. Wave heights are for ice free areas.

Superior North Central 12610 11700 11810 12800 11700 11600. Waves
1 to 3 feet. Wave heights are for ice free areas.

Superior South Central 14510 11600 12700 11600. Waves 2 feet or
less. Wave heights are for ice free areas.

Superior East 11520 13510 12610 12710. Waves 2 to 4 feet
subsiding to 1 to 3 feet today. Waves 1 to 2 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