265
FZUS63 KMQT 062001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EDT Fri Jun 6 2025

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...

30.0 inch high pressure ridging slowly weakens into the weekend.
Meanwhile, a 29.4 inch low moves southeast over Northern Ontario
toward Lake Superior, bringing 29.6 inch troughing to Lake Superior
on Sunday. This low weakens through the day, while a secondary 29.6
inch low develops near Lake Huron. This low and associated troughing
lifts north into Ontario Monday morning, then slowly exits through
James Bay on Tuesday. 29.9 inch ridging builds back over the lake by
Tuesday evening, then lingers until at least Thursday morning.


LSZ162-070800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Fri Jun 6 2025 /301 PM CDT Fri Jun 6 2025/

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...West winds 5 to 15 knots backing east after midnight.
Patchy fog. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
late. Patchy fog through early afternoon. A slight chance of rain
showers by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots veering south
after midnight. A slight chance of showers through midnight. A
slight chance of thunderstorms. Showers after midnight. Waves
building to 1 to 3 feet.
.SUNDAY...Southwest winds 10 to 20 knots. Showers and a slight
chance of thunderstorms. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 10 to 20 knots veering west after
midnight. A chance of showers through midnight, then showers
likely after midnight. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots veering north by mid
afternoon. Showers. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.

$$

LSZ263-070800-
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 PM EDT Fri Jun 6 2025

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...West winds 5 to 15 knots becoming southwest less than
10 knots after midnight, then backing southeast late. Patchy fog.
Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots backing east in the
afternoon. Patchy fog through early afternoon. A slight chance of
rain showers by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight, then increasing to 10 to 20 knots late. Showers
likely after midnight. Waves building to 1 to 3 feet.
.SUNDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Showers and a slight chance of
thunderstorms. Waves building to 2 to 4 feet, then subsiding to
calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots. A chance of
showers. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots veering north by mid
afternoon. Showers likely. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.

$$

LSZ264-070800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Fri Jun 6 2025

.LATE THIS AFTERNOON...Southwest winds less than 10 knots. Areas
of smoke. Waves calm to 2 feet.
.TONIGHT...West winds less than 10 knots backing southwest late.
Areas of smoke through midnight, then patchy fog after midnight.
Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast in the
afternoon. Areas of smoke by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. Areas of smoke through midnight. A
chance of showers after midnight. Waves building to 2 to 4 feet.
.SUNDAY...South winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. A slight chance of thunderstorms through early
afternoon. Showers. Waves subsiding to 1 to 3 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots. A chance of rain
showers. Waves subsiding to calm to 2 feet.
.MONDAY...East winds 5 to 15 knots. A chance of rain showers.
Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. A chance of rain
showers. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.

$$

LSZ265-070800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Fri Jun 6 2025

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Areas of
smoke. A slight chance of showers. Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest after
midnight, then backing south late. Areas of smoke. Patchy fog
after midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Areas of smoke by mid afternoon. Waves
calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Areas of smoke through midnight. A slight chance
of showers after midnight. Waves building to 1 to 3 feet.
.SUNDAY...South winds 10 to 20 knots. A slight chance of
thunderstorms through early afternoon. Showers. Waves subsiding
to calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A chance of showers. Waves calm to
2 feet.
.MONDAY...South winds 5 to 15 knots becoming east 10 to 20 knots
by mid afternoon. A chance of showers through early afternoon,
then showers likely by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Northwest winds 5 to 15 knots becoming west 10 to
20 knots after midnight. A chance of showers. Waves calm to
2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.

$$

LSZ266-070800-
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 PM EDT Fri Jun 6 2025

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Areas of smoke.
A slight chance of showers. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering northwest late. Areas
of smoke through midnight. Patchy fog after midnight. Waves calm
to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing east late. Areas of
smoke by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight, then increasing to 15 to 25 knots late. Areas of
smoke through midnight. A slight chance of showers after
midnight. Waves building to 2 to 4 feet.
.SUNDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. A chance of showers and a slight
chance of thunderstorms through early afternoon, then showers by
mid afternoon. Waves subsiding to 1 to 3 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots. Rain showers likely
through midnight, then a chance of rain showers after midnight.
Waves subsiding to calm to 2 feet.
.MONDAY...South winds 5 to 15 knots backing east by mid
afternoon. A chance of rain showers through early afternoon, then
rain showers likely by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...North winds 5 to 15 knots backing northwest after
midnight. A chance of rain showers. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ267-070800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Fri Jun 6 2025

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. A slight
chance of showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots. Patchy fog after
midnight. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots veering northeast late.
Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight, then backing southeast late. Waves building to
1 to 3 feet.
.SUNDAY...Southeast winds 10 to 20 knots. A slight chance of
showers through early afternoon, then showers likely by mid
afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Showers through midnight. A chance of showers
after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...South winds 10 to 20 knots becoming southeast 5 to
15 knots by mid afternoon. A chance of showers through early
afternoon, then showers likely by mid afternoon. Waves calm to
2 feet.
.MONDAY NIGHT...North winds 5 to 15 knots backing west after
midnight. A chance of rain showers. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots. A chance of rain showers. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ261-070200-
MAFOR 0621/
Superior West 11400 11700 11100 11204 11304 11300 11200 11100.
Waves 1 foot or less.

Superior North Central 12500 12600 11500 11400 12310. Waves 2
feet or less.

Superior South Central 11700 12500 11600 12300 11310 11320. Waves
2 feet or less.

Superior East 15700 11500 11800. Waves 1 foot or less.

$$

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