761
FZUS63 KMQT 261402
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1002 AM EDT Thu Jun 26 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...

30.1 inch ridging remains over much of Lake Superior today as a 30.2
inch is over Quebec. Meanwhile, a 29.8 inch low lifts into the Upper
Mississippi Valley, passing near the Straits of Mackinaw on Friday.
Weak 30.0 inch ridging then resides over the lake until Saturday
afternoon when a 29.6 inch low passing through northern Ontario
brings a 29.8 inch trough over the lake on Sunday. Monday into
Tuesday, Lake Superior will be between a 30.0 inch high over the
Plains and a low over Quebec deepening from 29.6 to 29.3 inches.


LSZ162-262000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1002 AM EDT Thu Jun 26 2025 /902 AM CDT Thu Jun 26 2025/

.REST OF TODAY...Northeast winds 15 to 25 knots. Isolated showers
by mid afternoon. Waves 2 to 4 feet.
.TONIGHT...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers. Waves 2 to 4 feet.
.FRIDAY...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots becoming east less
than 10 knots after midnight. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots. A chance of showers. A
slight chance of thunderstorms by mid afternoon. Waves calm to
2 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots backing west
after midnight. A chance of showers through midnight. A chance of
thunderstorms. Showers likely after midnight. Waves calm to
2 feet.
.SUNDAY...Southwest winds 5 to 15 knots becoming west 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.

$$

LSZ263-262000-
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 AM EDT Thu Jun 26 2025

.REST OF TODAY...Northeast winds 10 to 20 knots. Isolated showers
by mid afternoon. Waves 1 to 3 feet building to 2 to 4 feet.
.TONIGHT...East winds 10 to 20 knots backing northeast after
midnight. A chance of showers. Waves 2 to 4 feet.
.FRIDAY...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing north late. A slight
chance of showers through early afternoon. Waves subsiding to
calm to 2 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots becoming southwest less
than 10 knots after midnight. Waves calm to 2 feet.
.SATURDAY...South winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. A slight chance of showers and
thunderstorms by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering southwest
after midnight. A chance of showers through midnight. Showers
likely after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering west. A chance of
showers. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
A chance of showers. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.

$$

LSZ264-262000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1002 AM EDT Thu Jun 26 2025

.REST OF TODAY...East winds 10 to 20 knots. Isolated showers by
mid afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots backing northeast late. A
chance of showers. Waves building to 1 to 3 feet.
.FRIDAY...Northeast winds 5 to 15 knots backing north late. A
chance of showers through early afternoon. Waves subsiding to
calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots becoming west less
than 10 knots after midnight. Waves calm to 2 feet.
.SATURDAY...South winds less than 10 knots becoming southeast
5 to 15 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. A chance of showers. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering west. A chance of
showers. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves calm to 2 feet.

$$

LSZ265-262000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1002 AM EDT Thu Jun 26 2025

.REST OF TODAY...East winds 10 to 20 knots. Isolated showers by
mid afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots. Showers. Waves building to
2 to 4 feet.
.FRIDAY...Northeast winds 10 to 20 knots backing north in the
afternoon. A chance of showers through early afternoon. Waves
subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.SATURDAY...East 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. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots veering west. A chance of
showers. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ266-262000-
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 AM EDT Thu Jun 26 2025

.REST OF TODAY...Northeast winds 10 to 20 knots veering east
late. Isolated showers by mid afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots. A chance of showers through
midnight, then showers after midnight. Waves building to 2 to
4 feet.
.FRIDAY...Northeast winds 10 to 20 knots backing north late. A
chance of showers. Waves subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.SATURDAY...Northwest 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. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots veering southwest. A chance
of showers. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ267-262000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1002 AM EDT Thu Jun 26 2025

.REST OF TODAY...East winds 10 to 20 knots. Isolated showers by
mid afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots increasing to 15 to 25 knots
late. A chance of showers through midnight, then showers and a
slight chance of thunderstorms after midnight. Waves building to
1 to 3 feet.
.FRIDAY...East winds 10 to 20 knots backing north late. Showers
through early afternoon, then a chance of showers by mid
afternoon. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. A chance of showers. Waves calm to
2 feet.
.SUNDAY...South winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.

$$

LSZ261-262000-
MAFOR 2615/
Superior West 12130 11130 19136 14120 11120. Waves 2 to 4 feet.

Superior North Central 14210 11210 11220 11116 11110. Waves 1 to
3 feet.

Superior South Central 11210 11220 11220 19226 11210 13226 11120.
Waves 1 to 2 feet this afternoon. Waves 2 to 4 feet tonight and
Friday morning.

Superior East 11110 12210 12220 11226 12126. 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