773
FZUS63 KMQT 140202
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 PM EDT Fri Jun 13 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 30.2 inch high over northern Ontario shifts southeast to Quebec
for Saturday. This is reinvigorated by another 30.2 inch high
pressure descending southeast from northern Manitoba on Saturday to
Quebec by Sunday night, maintaining a 30.2 to 30.1 inch ridge over
Lake Superior the remainder of the weekend. Meanwhile, a 29.9 inch
low over Missouri tracks east to the Ohio Valley. A weak 29.8 inch
trough approaches from the west on Monday. This trough deepens to
29.7 inches Monday night, moving east over Lake Superior on Tuesday.
This trough looks to be followed by a 29.6 inch low pressure
tracking northeast over the Great Lakes Wednesday/Thursday.


LSZ162-140800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 PM EDT Fri Jun 13 2025 /901 PM CDT Fri Jun 13 2025/

.REST OF TONIGHT...Northeast winds 10 to 20 knots. A slight
chance of showers. Waves 2 to 4 feet.
.SATURDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. A slight chance of showers. Waves
subsiding to 1 to 3 feet.
.SATURDAY NIGHT...Northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. A chance of showers. Waves
subsiding to calm to 2 feet.
.SUNDAY...Northeast winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.
.SUNDAY NIGHT...Northeast winds 5 to 15 knots backing north after
midnight. A slight chance of thunderstorms through midnight. A
chance of showers. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots. Showers likely.
Waves calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of showers. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots backing north. A
chance of showers and thunderstorms. Waves calm to 2 feet.

$$

LSZ263-140800-
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 PM EDT Fri Jun 13 2025

.REST OF TONIGHT...East winds 5 to 15 knots. A slight chance of
rain showers. Waves 1 to 3 feet subsiding to calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots backing northeast late. A
slight chance of showers. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.SUNDAY NIGHT...Northeast winds 5 to 15 knots becoming west less
than 10 knots after midnight. A slight chance of thunderstorms
through midnight. A chance of showers. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots backing northeast after
midnight. Showers likely. Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots backing north. A
chance of showers and thunderstorms. Waves calm to 2 feet.

$$

LSZ264-140800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 PM EDT Fri Jun 13 2025

.REST OF TONIGHT...East winds less than 10 knots increasing to
5 to 15 knots after midnight. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots. A slight chance of
rain showers. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots. A slight chance of showers.
Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots becoming west less
than 10 knots after midnight. A chance of showers. Waves calm to
2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots. A chance of
showers. Waves calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots backing northeast. A chance
of showers. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots backing north. A
chance of showers and thunderstorms. Waves calm to 2 feet.

$$

LSZ265-140800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 PM EDT Fri Jun 13 2025

.REST OF TONIGHT...East winds 5 to 15 knots. A slight chance of
showers. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. A slight chance of showers. Waves calm to
2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots. A slight chance of
showers. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A chance of showers. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots veering southwest
after midnight. A chance of showers and a slight chance of
thunderstorms. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A chance of showers through midnight.
Showers likely after midnight. Waves calm to 2 feet.
.TUESDAY...North winds 10 to 20 knots becoming southeast 5 to
15 knots. A chance of showers. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots backing north. A
chance of showers and thunderstorms. Waves calm to 2 feet.

$$

LSZ266-140800-
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 PM EDT Fri Jun 13 2025

.REST OF TONIGHT...East winds 5 to 15 knots. A slight chance of
rain showers. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. A slight chance of showers. Waves calm to
2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots. A slight chance of
showers. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A chance of showers. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots veering south after
midnight. A chance of showers and a slight chance of
thunderstorms. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots. A chance of
showers. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots becoming east 5 to
15 knots. A chance of showers. Waves calm to 2 feet.
.WEDNESDAY...East winds 10 to 20 knots backing north. A chance of
showers and thunderstorms. Waves calm to 2 feet.

$$

LSZ267-140800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 PM EDT Fri Jun 13 2025

.REST OF TONIGHT...Northeast winds 5 to 15 knots veering east
after midnight, then increasing to 10 to 20 knots late. Waves
calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A slight chance of showers after
midnight. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A slight chance of showers. Waves calm to
2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. A chance of showers. A slight chance of
thunderstorms after midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots veering northwest by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A chance of showers. Waves calm to
2 feet.
.TUESDAY...Southeast winds 10 to 20 knots veering south. A chance
of showers. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots backing north. A
chance of showers. A chance of thunderstorms. Waves calm to
2 feet.

$$

LSZ261-140800-
MAFOR 1403/
Superior West 11210 13220 13120 11110. Waves 2 to 3 feet.

Superior North Central 13200 14210 11210. Waves 1 foot or less.

Superior South Central 13200 12210 11220 12210. Waves 1 foot or
less.

Superior East 11100 11200 14210 12110. Waves 2 feet 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