149
FZUS63 KMQT 052002
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EDT Thu Jun 5 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 lingers overhead, then slowly
weakens into the weekend. 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 lifts
north into Ontario Monday morning. 29.9 inch ridging builds back
over the lake by Tuesday afternoon and lingers until at least
Thursday morning.


LSZ162-060800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Thu Jun 5 2025 /301 PM CDT Thu Jun 5 2025/

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

$$

LSZ263-060800-
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 Thu Jun 5 2025

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots diminishing to less than
10 knots after midnight, then veering northwest late. A chance of
showers. Waves calm to 2 feet.
.FRIDAY...West winds less than 10 knots becoming southwest 5 to
15 knots in the afternoon. Areas of smoke. A chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots becoming south less
than 10 knots late. Areas of smoke. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing east by mid
afternoon. A slight chance of showers by mid afternoon. Waves
calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. 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. Waves 1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots veering west after
midnight. A chance of showers. Waves subsiding to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Showers likely. Waves calm to
2 feet.
.TUESDAY...West winds 5 to 15 knots backing southwest. Waves calm
to 2 feet.

$$

LSZ264-060800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Thu Jun 5 2025

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

$$

LSZ265-060800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Thu Jun 5 2025

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering northwest after
midnight. A slight chance of showers after midnight. Waves calm
to 2 feet.
.FRIDAY...West winds 5 to 15 knots veering northwest in the
afternoon, then backing southeast late. A chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots becoming southwest less
than 10 knots after midnight, then increasing to 5 to 15 knots
late. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. A chance of showers after midnight. Waves calm to
2 feet.
.SUNDAY...Southeast winds 10 to 20 knots. Showers. Waves building
to 1 to 3 feet, then subsiding to calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots veering west after
midnight. A chance of showers. Waves calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots backing west. 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.

$$

LSZ266-060800-
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 Thu Jun 5 2025

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots backing southeast after
midnight, then backing north late. A slight chance of rain
showers after midnight. Waves calm to 2 feet.
.FRIDAY...Northwest winds 5 to 15 knots backing west late. A
chance of showers. Waves calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots backing west after
midnight, then veering northwest late. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. A chance of showers after midnight. Waves
building to 2 to 4 feet.
.SUNDAY...South winds 15 to 25 knots becoming southeast 10 to
20 knots by mid afternoon. Showers. Waves subsiding to 1 to
3 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots veering west after
midnight. Showers likely through midnight, then a chance of
showers after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots backing west. 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.

$$

LSZ267-060800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Thu Jun 5 2025

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Areas of
smoke. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots backing north late.
Areas of smoke through midnight. A slight chance of rain showers
after midnight. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then backing northwest late. A slight chance of
showers. Waves calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...Northwest winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots. Waves building
to 1 to 3 feet.
.SUNDAY...Southeast winds 10 to 20 knots. A chance of showers
through early afternoon, then showers 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 backing east after
midnight. Showers likely through midnight, then a chance of
showers after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. Rain showers likely, then a
chance of rain showers. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots backing southwest. A chance
of rain showers. Waves calm to 2 feet.

$$

LSZ261-060200-
MAFOR 0521/
Superior West 11300 11200 11500 11600 11700 11400 12500. A chance
of showers tonight. Waves 1 foot or less.

Superior North Central 12400 11500 12700 13600. Waves 1 foot or
less.

Superior South Central 11310 11300 11400 14700 11800. A chance of
showers Friday morning. Waves 1 foot or less.

Superior East 13300 11100 11800 13700. A chance of showers Friday
morning. 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