154
FZUS63 KMQT 090801
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 AM EDT Sat May 9 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 29.5 inch low over Lake Superior this morning pushes east into
Ontario before arriving over western Quebec this evening. Behind the
low, ridging progressively builds over the lake as a 30.2 inch high
pressure over the Canadian Prairies builds towards the Great Lakes
this weekend. The high shifts southeast into the western Great Lakes
at 30.3 inches Sunday night into Monday. Ridging from the high
persists at around 30.2 inches over Lake Superior through Monday
evening. The ridging is eventually replaced by a 29.7 inch Clipper
descending over western Lake Superior on Tuesday as the previous
high pressure weakens and shifts to the East Coast. As the Clipper
continues towards the eastern Great Lakes Tuesday night into
Wednesday, 30.1 inch high pressure ridging moves over Lake Superior
on Wednesday.


LSZ162-092000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 AM EDT Sat May 9 2026 /301 AM CDT Sat May 9 2026/

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Waves calm
to 2 feet.
.TODAY...Northwest winds 10 to 20 knots backing west in the
afternoon. Waves calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots. Waves calm to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots veering north after
midnight. Waves calm to 2 feet.
.MONDAY...North winds less than 10 knots becoming south 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots. A chance of rain
showers after midnight. Waves calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots backing north. Rain showers.
Waves building to 2 to 4 feet, then subsiding to calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots veering north. Waves calm
to 2 feet.

$$

LSZ263-092000-
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-
401 AM EDT Sat May 9 2026

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northwest winds 5 to 15 knots backing west late. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots veering north after
midnight. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots. Waves building to
1 to 3 feet.
.TUESDAY...Southeast winds 10 to 20 knots backing north. Rain
showers likely. Waves building to 2 to 4 feet, then subsiding to
1 to 3 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing west. Waves
subsiding to calm to 2 feet.

$$

LSZ264-092000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 AM EDT Sat May 9 2026

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...North winds 5 to 15 knots becoming northwest 10 to
20 knots in the afternoon, then becoming west 5 to 15 knots late.
Sprinkles by mid afternoon. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing west late. Waves
calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves calm to 2 feet.
.MONDAY...Northwest winds less than 10 knots becoming southwest
5 to 15 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots becoming southeast
10 to 20 knots after midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 15 to 25 knots becoming north 10 to
20 knots. A chance of rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 1 to 3 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing west. Waves
subsiding to calm to 2 feet.

$$

LSZ265-092000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 AM EDT Sat May 9 2026

.EARLY THIS MORNING...West winds 10 to 20 knots. Sprinkles and
flurries. Waves calm to 2 feet.
.TODAY...Northwest winds 15 to 25 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.TONIGHT...West winds 10 to 20 knots increasing to 15 to 25 knots
after midnight, then veering northwest late. Waves subsiding to
calm to 2 feet.
.SUNDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots late. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots. Waves calm to
2 feet.
.MONDAY...Northwest winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 1 to 3 feet.
.TUESDAY...Southeast winds 20 to 30 knots becoming northwest
10 to 20 knots. Rain showers likely, then a chance of rain
showers. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 1 to 3 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves building to 2 to 4 feet, then subsiding to calm
to 2 feet.

$$

LSZ266-092000-
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-
401 AM EDT Sat May 9 2026

.EARLY THIS MORNING...West winds 5 to 15 knots. A chance of rain
showers and flurries. Waves calm to 2 feet.
.TODAY...Northwest 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.
.TONIGHT...Northwest winds 15 to 25 knots. Waves subsiding to
2 to 4 feet.
.SUNDAY...Northwest winds 15 to 25 knots. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.MONDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 1 to 3 feet.
.TUESDAY...Southeast winds 20 to 30 knots becoming north 15 to
25 knots. A chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 1 to 3 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots diminishing to 5 to
15 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet.

$$

LSZ267-092000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 AM EDT Sat May 9 2026

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. A chance of
rain showers. Waves calm to 2 feet.
.TODAY...Northwest winds 5 to 15 knots increasing to 20 to
30 knots. Waves building to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet.
.SUNDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.MONDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...West winds less than 10 knots becoming south 5 to
15 knots after midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots. A chance of rain
showers. Waves building to 2 to 4 feet, then subsiding to calm to
2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ261-091400-
MAFOR 0909/
Superior West 11710 11720 11710 12610 13710. Waves 2 feet or
less.

Superior North Central 11700 11810 12720 12610 12710. Waves 1 to
3 feet.

Superior South Central 11610 11720 12730 11720 13620. Waves 1 to
3 feet building to 2 to 4 feet today. Waves 2 to 3 feet tonight.

Superior East 11600 11700 11720 11730 12740 11730 11720. A chance
of rain showers early this morning. Waves 1 to 3 feet building to
2 to 4 feet today. Waves 3 to 6 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