676
FZUS63 KMQT 040202
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1002 PM EDT Tue Jun 3 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...

A 29.6 inch low will move northeast of the Upper Great Lakes
tonight; with a cold frontal passage associated with that low
pressure. 30.0 inch high pressure ridging builds behind the
departing low pressure by late Wednesday, then lingers overhead
through at least Saturday morning. This ridge diminishes Saturday
night as a 29.4 inch low moves southeast over Northern Ontario
toward Lake Superior through Sunday.


LSZ162-040800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1002 PM EDT Tue Jun 3 2025 /902 PM CDT Tue Jun 3 2025/

.REST OF TONIGHT...Southwest winds 5 to 15 knots veering west
late. Areas of smoke and dense fog. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Areas of smoke through early
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots veering west
after midnight. Waves calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots veering north
after midnight. A slight chance of showers. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots backing north after
midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots. Showers. A chance of
showers. Waves building to 1 to 3 feet, then subsiding to calm to
2 feet.

$$

LSZ263-040800-
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-
1002 PM EDT Tue Jun 3 2025

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT WEDNESDAY...

.REST OF TONIGHT...West winds 5 to 15 knots backing southwest
after midnight, then veering west late. Areas of dense fog and
smoke. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing southwest in the
afternoon, then increasing to 10 to 20 knots late. Areas of smoke
and dense fog through early afternoon. Waves building to 1 to
3 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight, then veering west late. Waves
subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots becoming south
less than 10 knots after midnight. A slight chance of showers
after midnight. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots becoming north less
than 10 knots after midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots backing south. Showers
likely. Waves building to 1 to 3 feet.
.SUNDAY...Southwest winds 10 to 20 knots veering west. Showers
likely. A chance of showers. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.

$$

LSZ264-040800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1002 PM EDT Tue Jun 3 2025

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT WEDNESDAY...

.REST OF TONIGHT...West winds 5 to 15 knots. A slight chance of
rain showers by midnight. Areas of dense fog and smoke. Waves
calm to 2 feet building to 1 to 3 feet.
.WEDNESDAY...West winds 5 to 15 knots backing southwest in the
afternoon. Areas of dense fog through early afternoon. Areas of
smoke. Waves subsiding to calm to 2 feet, then building to 1 to
3 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots veering west
late. Waves subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots diminishing to
less than 10 knots after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...Northwest winds less than 10 knots. Waves calm to
2 feet.
.SATURDAY...South winds 5 to 15 knots. A chance of showers. Waves
building to 1 to 3 feet.
.SUNDAY...Southwest winds 10 to 20 knots. Rain showers likely,
then a chance of rain showers. Waves 1 to 3 feet.

$$

LSZ265-040800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1002 PM EDT Tue Jun 3 2025

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT WEDNESDAY...

.REST OF TONIGHT...Northwest winds 10 to 20 knots backing west
after midnight. Areas of dense fog and smoke. A chance of
showers. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots becoming south 5 to
15 knots late. Patchy dense fog through early afternoon. Areas of
smoke. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight, then diminishing to 5 to 15 knots
late. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots backing northwest
after midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.SUNDAY...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots. Showers, then a chance of showers. Waves calm to
2 feet.

$$

LSZ266-040800-
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-
1002 PM EDT Tue Jun 3 2025

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT WEDNESDAY...

.REST OF TONIGHT...Northwest winds 10 to 20 knots becoming west
5 to 15 knots late. Areas of dense fog and smoke. A chance of
rain showers. Waves calm to 2 feet building to 1 to 3 feet.
.WEDNESDAY...West winds 5 to 15 knots backing south late. Areas
of dense fog through early afternoon. Areas of smoke. Patchy fog
by mid afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots veering southwest
late. Areas of smoke. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots becoming south 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots veering southwest. Rain
showers likely, then a chance of rain showers. Waves building to
1 to 3 feet.

$$

LSZ267-040800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1002 PM EDT Tue Jun 3 2025

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT WEDNESDAY...

.REST OF TONIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight, then diminishing to 10 to 20 knots
late. Areas of dense fog and smoke. Rain showers likely by
midnight. A chance of rain showers after midnight. Waves calm to
2 feet building to 1 to 3 feet.
.WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. A slight chance of rain showers
through early afternoon. Areas of fog and smoke. Waves subsiding
to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots. Areas of smoke and
patchy fog. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots backing southeast
after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots backing north by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots becoming south 10 to
20 knots. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots. Rain showers likely. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ261-040800-
MAFOR 0403/
Superior West 11504 11514 11614 11600 14510. Waves 2 feet or
less.

Superior North Central 11614 12624 11614 12510 12520. Waves 1 to
3 feet.

Superior South Central 11714 13614 12600 12400. A chance of
showers overnight. Waves 2 feet or less.

Superior East 11726 19724 11724 11714 11604 12600 11500 11400.
Waves 1 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