418
FZUS63 KMQT 152115 CCA
GLFLS

Open Lake Forecast for Lake Superior...CORRECTED
National Weather Service Marquette MI
415 PM EST Sat Nov 15 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 29.3 inch trough is placed just north of Lake Huron this
afternoon. The trough exits into eastern Ontario this evening and
develops into a 29.1 inch low over New England by Sunday morning,
further deepening to 28.8 inches over the Canadian Maritimes Sunday
night into Monday. Troughing gradually weakens to 29.9 inches over
Lake Superior through Sunday night as this occurs. Meanwhile, 30.1
inch high pressure extending from Saskatchewan to the Dakotas this
weekend builds to 30.3 inches as it shifts east to the Great Lakes
by Tuesday night. High pressure persists at around 30.2 inches over
the lake through late next week as the high shifts east to New
England by Thursday night.


LSZ162-160900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
415 PM EST Sat Nov 15 2025 /315 PM CST Sat Nov 15 2025/

.LATE THIS AFTERNOON...Northwest winds 20 to 30 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 20 to 30 knots late.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northwest winds 20 to 30 knots. Waves subsiding to 2 to
4 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots late. Waves subsiding to calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.TUESDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots veering southwest. Waves
calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots becoming north 10 to
20 knots. A chance of rain showers. Waves calm to 2 feet.

$$

LSZ263-160900-
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-
415 PM EST Sat Nov 15 2025

.LATE THIS AFTERNOON...Northwest winds 20 to 30 knots. Waves 4 to
8 feet occasionally to 10 feet.
.TONIGHT...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. Waves 5 to 8 feet occasionally to 10 feet.
.SUNDAY...Northwest winds 15 to 25 knots. Waves subsiding to 3 to
6 feet occasionally to 8 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots by midnight. Waves subsiding to 2 to 4 feet.
.MONDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds less than 10 knots veering south
after midnight. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots veering southwest. Waves
calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots veering north. A chance
of rain showers. Waves calm to 2 feet.

$$

LSZ264-160900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
415 PM EST Sat Nov 15 2025

.LATE THIS AFTERNOON...Northwest winds 20 to 30 knots. Waves 5 to
8 feet occasionally to 10 feet.
.TONIGHT...Northwest winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 20 to 30 knots by
midnight. Waves building to 7 to 10 feet occasionally to 13 feet.
.SUNDAY...Northwest winds 20 to 30 knots. Waves subsiding to 5 to
8 feet occasionally to 10 feet.
.SUNDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots by midnight. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...Northwest winds 10 to 20 knots. Waves subsiding to 1 to
3 feet.
.MONDAY NIGHT...North winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...North winds less than 10 knots backing west
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots veering north. A chance
of rain showers. Waves building to 1 to 3 feet.

$$

LSZ265-160900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
415 PM EST Sat Nov 15 2025

...GALE WARNING IN EFFECT THROUGH SUNDAY MORNING...

.LATE THIS AFTERNOON...Northwest gales to 40 knots. Waves 5 to
8 feet occasionally to 10 feet.
.TONIGHT...Northwest gales to 40 knots. A slight chance of snow
showers after midnight. Waves building to 7 to 10 feet
occasionally to 13 feet.
.SUNDAY...Northwest gales to 35 knots becoming northwest winds to 30
knots with a few gale force gusts up to 35 knots possible by the
afternoon. A slight chance of snow showers in the morning. Waves
subsiding to 5 to 8 feet occasionally to 10 feet.
.SUNDAY NIGHT...Northwest wind to 30 knots with a few gale force
gusts up to 35 knots possible diminishing to 20 to 30 knots by
midnight. Waves building to 6 to 9 feet occasionally to 11 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.MONDAY...Northwest winds 15 to 25 knots. Waves subsiding to 1 to
3 feet.
.MONDAY NIGHT...Northwest winds 5 to 15 knots veering north after
midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots backing west after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots becoming north 10 to
20 knots. A chance of rain showers. Waves calm to 2 feet.

$$

LSZ266-160900-
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-
415 PM EST Sat Nov 15 2025

...GALE WARNING IN EFFECT THROUGH SUNDAY EVENING...

.LATE THIS AFTERNOON...Northwest gales to 40 knots. Waves 9 to
12 feet occasionally to 15 feet building to 10 to 14 feet
occasionally to 18 feet.
.TONIGHT...Northwest gales to 40 knots. A slight chance of rain
showers in the evening. A chance of snow showers. Waves 10 to
14 feet occasionally to 18 feet.
.SUNDAY...Northwest gales to 40 knots. A chance of snow showers.
Waves subsiding to 10 to 14 feet occasionally to 18 feet.
.SUNDAY NIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots late. A chance of snow showers. Waves subsiding to 6 to
9 feet occasionally to 11 feet.
.MONDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. A slight chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots backing northwest
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots becoming west 10 to
20 knots. A chance of rain showers. Waves building to 1 to
3 feet.

$$

LSZ267-160900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
415 PM EST Sat Nov 15 2025

...GALE WARNING IN EFFECT THROUGH SUNDAY EVENING...

.LATE THIS AFTERNOON...Northwest gales to 40 knots. Waves 9 to
12 feet occasionally to 15 feet building to 10 to 14 feet
occasionally to 18 feet.
.TONIGHT...Northwest gales to 40 knots. A chance of snow showers
in the evening. A chance of rain showers. Snow showers likely
after midnight. Waves 10 to 14 feet occasionally to 18 feet.
.SUNDAY...Northwest gales to 40 knots. Snow showers likely. Waves
subsiding to 10 to 14 feet occasionally to 18 feet.
.SUNDAY NIGHT...Northwest gales to 40 knots becoming north gales
to 35 knots by midnight, then becoming northwest 20 to 30 knots
late. A chance of snow showers. Waves subsiding to 6 to 9 feet
occasionally to 11 feet.
.MONDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. A slight chance of snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 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...North winds 10 to 20 knots becoming northwest 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots backing south. Waves
calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots veering southwest. A
chance of rain showers, then rain showers likely. Waves building
to 1 to 3 feet.

$$

LSZ261-160300-
MAFOR 1522/
Superior West 15740 12730. Waves 3 to 6 feet building to 4 to 7
feet, then subsiding to 3 to 6 feet tonight. Waves 3 to 6 feet
subsiding to 2 to 4 feet Sunday.

Superior North Central 12740 19750 15740. Waves 5 to 9 feet building
to 6 to 10 feet tonight. Waves 6 to 10 feet subsiding to 5 to 8 feet
Sunday.

Superior South Central...GALE WARNING IN EFFECT...13750 11740
14750. Waves 6 to 9 feet building to 8 to 12 feet tonight. Waves
8 to 12 feet Sunday.

Superior East...GALE WARNING IN EFFECT...13750 14757 11750. A
chance of rain showers this evening. Waves 10 to 13 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