711
FZUS63 KMQT 130204 CCA
GLFLS

Open Lake Forecast for Lake Superior...CORRECTED
National Weather Service Marquette MI
1004 PM EDT Sun Oct 12 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...

29.8 inch troughing remains over Lake Superior the rest of this
evening into Monday morning as a 29.1 inch low over southwest
Manitoba continues northeast to Hudson Bay tonight through Monday,
gradually weakening to 29.5 inches as it does so. A 30.5 inch high
builds in over the Canadian Prairies Monday night into Tuesday,
shifting east to the Great Lakes and northern Ontario by Wednesday
at around 30.3 inches. Ridging weakens to 30.0 inches over Lake
Superior through Thursday as troughing develops over the Plains and
the parent high shifts east. Thursday night through Friday, a 29.4
inch low develops over the Northern Plains and lifts near to Lake
Winnipeg. This low is projected to bring 29.6 inch troughing over
Lake Superior Friday and Friday night.


LSZ162-130800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1004 PM EDT Sun Oct 12 2025 /904 PM CDT Sun Oct 12 2025/

.REST OF TONIGHT...Southeast winds 15 to 25 knots veering
southwest late. Showers likely. Waves 2 to 4 feet building to
3 to 5 feet occasionally to 7 feet.
.MONDAY...West winds 20 to 30 knots diminishing to 15 to 25 knots
late. Waves subsiding to 2 to 4 feet.
.MONDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots veering southwest by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots veering southeast
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. Showers likely. Waves building to 2 to 4 feet.
.FRIDAY...Southwest winds 15 to 25 knots. A chance of showers.
Waves subsiding to 1 to 3 feet.

$$

LSZ263-130800-
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-
1004 PM EDT Sun Oct 12 2025

.REST OF TONIGHT...South winds 20 to 30 knots increasing to
30 knots with a few gale force gusts to 35 knots possible late. A
slight chance of showers by midnight, then showers after
midnight. Waves 3 to 6 feet occasionally to 8 feet.
.MONDAY...West winds 20 to 30 knots. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.MONDAY NIGHT...Northwest winds 15 to 25 knots. Waves subsiding
to 2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots backing south
after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. A chance of showers, then showers likely. Waves
building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots. Showers likely, then a chance of showers. Waves
subsiding to 2 to 4 feet.

$$

LSZ264-130800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1004 PM EDT Sun Oct 12 2025

...GALE WARNING IN EFFECT UNTIL 8 AM EDT MONDAY...

.REST OF TONIGHT...Southeast gales to 35 knots veering south
after midnight, then diminishing to 20 to 30 knots late. A slight
chance of showers by midnight. Showers after midnight. Waves 7 to
10 feet occasionally to 13 feet subsiding to 5 to 8 feet
occasionally to 10 feet.
.MONDAY...Southwest winds 20 to 30 knots veering west in the
afternoon. A slight chance of showers through early afternoon.
Waves subsiding to 3 to 6 feet occasionally to 8 feet, then
building to 4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...West winds 15 to 25 knots veering northwest after
midnight. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots increasing to 20 to
30 knots. A chance of showers, then showers likely. Waves
building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...South winds 20 to 30 knots becoming southwest 15 to
25 knots. Showers likely, then a chance of showers. Waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ265-130800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1004 PM EDT Sun Oct 12 2025

...GALE WARNING IN EFFECT UNTIL 8 AM EDT MONDAY...

.REST OF TONIGHT...South winds 20 to 30 knots with a few gale force
gusts to 35 knots. Showers after midnight. Waves 4 to 7 feet
occasionally to 9 feet subsiding to 3 to 5 feet occasionally to 7
feet.
.MONDAY...South winds 15 to 25 knots veering west in the
afternoon. A chance of showers through early afternoon. Waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.MONDAY NIGHT...West winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight. Waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet.
.TUESDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots backing southwest
after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots increasing to 20 to
30 knots. A chance of showers, then showers likely. Waves
building to 1 to 3 feet.
.FRIDAY...South winds 20 to 30 knots diminishing to 15 to
25 knots. Showers likely. Waves subsiding to calm to 2 feet.

$$

LSZ266-130800-
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-
1004 PM EDT Sun Oct 12 2025

...GALE WARNING IN EFFECT UNTIL 8 AM EDT MONDAY...

.REST OF TONIGHT...South gales to 35 knots diminishing to 20 to
30 knots late. A chance of showers after midnight. Waves 5 to
9 feet occasionally to 11 feet.
.MONDAY...South winds 20 to 30 knots becoming southwest 15 to
25 knots in the afternoon, then veering west late. Showers likely
through early afternoon. A chance of showers by mid afternoon.
Waves subsiding to 3 to 6 feet occasionally to 8 feet, then
building to 4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...West winds 15 to 25 knots veering northwest after
midnight. Waves 4 to 7 feet occasionally to 9 feet.
.TUESDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots. Waves subsiding to
1 to 3 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots backing south
after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots increasing to 20 to
30 knots. A chance of showers, then showers likely. Waves
building to 4 to 7 feet occasionally to 9 feet.
.FRIDAY...South winds 20 to 30 knots. Showers likely. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.

$$

LSZ267-130800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1004 PM EDT Sun Oct 12 2025

.REST OF TONIGHT...Southeast winds 20 to 30 knots veering south
after midnight. Waves 3 to 6 feet occasionally to 8 feet.
.MONDAY...South winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon, then becoming west 10 to 20 knots
late. Showers through early afternoon. A chance of showers by mid
afternoon. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots increasing to
20 to 30 knots. A slight chance of showers through midnight.
Waves building to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...Northwest winds 15 to 25 knots. Waves 4 to 7 feet
occasionally to 9 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots becoming south 15 to
25 knots. Showers likely. Waves building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...South winds 20 to 30 knots. Showers likely. Waves
building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ261-130800-
MAFOR 1303/
Superior West 12436 11540 11630 12640 11630 11720. Waves 2 to 4
feet building to 3 to 5 feet overnight. Waves 3 to 5 feet Monday.
Waves 3 to 5 feet subsiding to 2 to 4 feet Monday evening.

Superior North Central...GALE WARNING IN EFFECT...11450 11440
11446 11540 14640. Waves 6 to 10 feet overnight. Waves 5 to 8
feet Monday and Monday evening.

Superior South Central...GALE WARNING IN EFFECT...11450 11440
11446 11436 11520 13630. Waves 4 to 7 feet subsiding to 3 to 6
feet overnight. Waves 3 to 6 feet subsiding to 2 to 4 feet
Monday. Waves 2 to 4 feet Monday evening.

Superior East...GALE WARNING IN EFFECT...11340 19350 13430 11436
11520 11620 11720. Waves 4 to 7 feet overnight. Waves 3 to 6 feet
subsiding to 2 to 4 feet Monday. Waves 3 to 5 feet Monday evening.

$$

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