704
FZUS63 KMQT 061402
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 AM EDT Wed May 6 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...

30.2 inch ridging over the Canadian Prairies splits today and moves
to the Canadian Four Corners and the Southern Plains at 30.0 inches
and 30.2 inches, respectively. As this happens, expect weak high
pressure ridging of 29.9 inches to settle over Lake Superior. By
Thursday afternoon, Lake Superior is projected to be between a 29.4
inch low over Hudson Bay, a 29.4 inch low over the mouth of the St.
Lawrence River, a low of 29.7 inches over the Black Hills, a high of
30.1 inches over Oklahoma, and a weak 29.9 inch high over the
Saskatchewan/Manitoba line. The Hudson Bay and Black Hills lows work
to pass a 29.7 inch trough over Lake Superior Friday, strengthening
to 29.6 inches by Friday night into Saturday before the lows
consolidate over western Quebec by late Saturday. High pressure
ridging builds back up to 30.1 inches over Lake Superior by Sunday
as the parent high strengthens over the Canadian Prairies and
Northern Plains.


LSZ162-062000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 AM EDT Wed May 6 2026 /901 AM CDT Wed May 6 2026/

.REST OF TODAY...West winds 10 to 20 knots backing southwest
late. A chance of rain and snow showers. Waves calm to 2 feet
building to 1 to 3 feet.
.TONIGHT...West winds 5 to 15 knots. Sprinkles through midnight.
Waves subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southwest in the
afternoon. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots veering northwest. Waves
calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots veering northwest. Waves calm
to 2 feet.

$$

LSZ263-062000-
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-
1001 AM EDT Wed May 6 2026

.REST OF TODAY...West winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. A chance of rain and snow showers.
Waves 1 to 3 feet building to 2 to 4 feet.
.TONIGHT...West winds 5 to 15 knots. A chance of rain showers
through midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots veering west
after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots veering west after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots veering northwest. Waves
building to 1 to 3 feet.
.SUNDAY...West winds 5 to 15 knots veering northwest. Waves
subsiding to calm to 2 feet.

$$

LSZ264-062000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 AM EDT Wed May 6 2026

.REST OF TODAY...West winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Sprinkles and flurries by mid
afternoon. Waves 1 to 3 feet building to 2 to 4 feet.
.TONIGHT...West winds 5 to 15 knots diminishing to less than
10 knots late. Sprinkles and flurries through midnight. Waves
subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southwest in the
afternoon. A slight chance of snow showers by mid afternoon.
Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots veering northwest. Waves
building to 1 to 3 feet.
.SUNDAY...West winds 5 to 15 knots veering northwest. Waves
subsiding to calm to 2 feet.

$$

LSZ265-062000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 AM EDT Wed May 6 2026

.REST OF TODAY...West winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots backing south by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet.
.SATURDAY...West winds 15 to 25 knots veering northwest. A chance
of rain showers. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.SUNDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots. Waves building to 2 to 4 feet, then subsiding to calm
to 2 feet.

$$

LSZ266-062000-
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-
1001 AM EDT Wed May 6 2026

.REST OF TODAY...West winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. Waves 1 to 3 feet.
.TONIGHT...West winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then diminishing to 5 to 15 knots late. Waves
subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves building to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots becoming northwest 15 to
25 knots. A chance of rain showers. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.SUNDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ267-062000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 AM EDT Wed May 6 2026

.REST OF TODAY...West winds 10 to 20 knots. Waves 1 to 3 feet.
.TONIGHT...West winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.THURSDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots backing south
after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots veering west by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots veering northwest. A chance
of rain showers. Waves building to 2 to 4 feet.
.SUNDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 1 to 3 feet.

$$

LSZ261-062000-
MAFOR 0615/
Superior West 11620 12520 12610 13600. Waves 1 to 3 feet
subsiding to 1 foot or less this afternoon and tonight. Waves 1
foot or less Thursday morning.

Superior North Central 14620 11610 13600. Waves 2 to 3 feet this
afternoon. Waves 2 to 4 feet subsiding to 1 to 2 feet tonight.
Waves 1 to 2 feet Thursday morning.

Superior South Central 11610 12620 14610 11610. Waves 1 to 2
feet.

Superior East 14620 13610 11600. Waves 2 to 3 feet.

$$

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