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National Weather Service Marine Forecast FZUS63 KMQT

FZUS63 KMQT 040310
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1010 PM EST Sat Dec 3 2022

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
Tonight, Lake Superior is sandwiched between a 29.3
inch low over northern Quebec and a 30.5 inch high building into
Missouri. By midday Sunday, the high will weaken to 30.3 inches
south of Lower Michigan. Meanwhile, a 29.4 inch low will be moving
southeast from Lake Winnipeg, reaching the north shore of Lake
Superior Sunday night at 29.5 inches. This low will weaken
considerably to 29.8 inches by Monday night as it reaches the
Ontario/Quebec line. Early Tuesday morning, a 30.2 inch high will
build over the Upper Midwest, reaching Lake Superior at 30.3
inches by midday Tuesday. Overnight Tuesday into Wednesday, a weak
30.1 inch low over Lake Superior will separate the previous high
(now over Quebec) from a 30.5 inch high over southern Manitoba.
The Manitoba high will move over northern Ontario at 30.5 inches
Wednesday night and remain there Thursday.

LSZ162-041115-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1010 PM EST Sat Dec 3 2022 /910 PM CST Sat Dec 3 2022/

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

REST OF TONIGHT
West winds 20 to 30 knots. Isolated snow
showers late in the evening. Freezing spray. Waves 4 to 8 feet
occasionally to 10 feet.

SUNDAY
West winds 20 to 30 knots becoming southwest gales to
40 knots. Freezing spray. Waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 10 to 14 feet
occasionally to 18 feet.

SUNDAY NIGHT
West gales to 40 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.

MONDAY
Northwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon. Waves building 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 becoming south 10 to
20 knots in the afternoon. A chance of snow showers in the
afternoon. Waves calm to 2 feet.

TUESDAY NIGHT
Southwest winds 10 to 20 knots veering northwest
after midnight. A chance of snow showers. Waves calm to 2 feet.

WEDNESDAY
Northwest winds 10 to 20 knots becoming southwest
5 to 15 knots. Waves calm to 2 feet.

THURSDAY
Southwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.



LSZ263-041115-
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-
1010 PM EST Sat Dec 3 2022

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

REST OF TONIGHT
West winds to 30 knots with a few gale force
gusts to 35 knots. Freezing spray. Scattered snow showers. Waves 6
to 9 feet occasionally to 11 feet building to 8 to 11 feet
occasionally to 14 feet.

SUNDAY
West winds 20 to 30 knots becoming southwest gales to
45 knots. Freezing spray in the morning. Isolated snow showers.
Waves subsiding to 6 to 9 feet occasionally to 11 feet, then
building to 11 to 15 feet occasionally to 19 feet.

SUNDAY NIGHT
West gales to 40 knots diminishing to 15 to
25 knots. A slight chance of snow showers. A slight chance of
rain showers after midnight. Waves building to 12 to 17 feet
occasionally to 21 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.

MONDAY
West winds 10 to 20 knots becoming northwest 15 to
25 knots in the afternoon. A slight chance of snow showers in the
afternoon. Waves subsiding to 2 to 4 feet.

MONDAY NIGHT
Northwest winds 15 to 25 knots. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 1 to
3 feet.

TUESDAY
Northwest winds 10 to 20 knots backing south in the
afternoon. A chance of snow showers in the afternoon. Waves
subsiding to calm to 2 feet.

TUESDAY NIGHT
South winds 10 to 20 knots becoming west 15 to
25 knots after midnight. A chance of snow showers. Waves building
to 1 to 3 feet.

WEDNESDAY
North winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.

THURSDAY
Southwest winds 10 to 20 knots. Waves calm to 2 feet.



LSZ264-041115-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1010 PM EST Sat Dec 3 2022

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

REST OF TONIGHT
West winds to 30 knots with a few gale force
gusts to 35 knots. Freezing spray. Scattered snow showers. Waves
6 to 10 feet occasionally to 13 feet, then building to 8 to 11
feet occasionally to 14 feet.

SUNDAY
West winds 20 to 30 knots increasing to gales to
35 knots by late morning, then becoming southwest gales to
45 knots by mid afternoon. Freezing spray in the morning.
Scattered snow showers. Waves subsiding to 6 to 9 feet
occasionally to 11 feet, then building to 11 to 15 feet
occasionally to 19 feet.

SUNDAY NIGHT
West gales to 45 knots becoming northwest 10 to
20 knots late. A slight chance of rain showers in the evening. A
slight chance of snow showers. Waves building to 12 to 17 feet
occasionally to 21 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

MONDAY
Northwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. A slight chance of snow showers. Waves
subsiding to 2 to 4 feet.

MONDAY NIGHT
Northwest winds 10 to 20 knots. Waves 2 to
4 feet.

TUESDAY
Northwest winds 5 to 15 knots backing south in the
afternoon. Waves subsiding to calm to 2 feet.

TUESDAY NIGHT
South winds 5 to 15 knots becoming west 10 to
20 knots after midnight. Snow showers likely in the evening, then
a chance of snow showers after midnight. Waves building to 1 to
3 feet.

WEDNESDAY
North winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of snow showers. Waves building to 2 to
4 feet, then subsiding to calm to 2 feet.

THURSDAY
Southwest winds 5 to 15 knots veering west. Waves
calm to 2 feet.



LSZ265-041115-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1010 PM EST Sat Dec 3 2022

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

REST OF TONIGHT
West winds to 30 knots with a few gale force
gusts to 35 knots. Freezing spray. Scattered snow showers. Waves 4
to 8 feet occasionally to 10 feet.

SUNDAY
West winds 20 to 30 knots backing southwest by late
morning, then increasing to gales to 40 knots by mid afternoon.
Freezing spray in the morning. Isolated snow showers in the
morning. Waves subsiding to 3 to 6 feet occasionally to 8 feet,
then building to 5 to 8 feet occasionally to 10 feet.

SUNDAY NIGHT
West gales to 40 knots diminishing to 15 to 25
knots. A slight chance of snow showers. Waves building to 7 to 10
feet occasionally to 13 feet, then subsiding to 2 to 4 feet.

MONDAY
West winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A chance of snow showers. Waves subsiding to
1 to 3 feet.

MONDAY NIGHT
Northwest winds 15 to 25 knots. A chance of snow
showers in the evening. Waves building to 2 to 4 feet, then
subsiding to calm to 2 feet.

TUESDAY
West winds 10 to 20 knots backing south in the
afternoon. Waves calm to 2 feet.

TUESDAY NIGHT
South winds 10 to 20 knots veering west after
midnight. A chance of snow showers. Waves calm to 2 feet.

WEDNESDAY
Northwest winds 10 to 20 knots. A chance of snow
showers. Waves building to 1 to 3 feet, then subsiding to calm to
2 feet.

THURSDAY
Southwest winds 10 to 20 knots veering west. Waves
calm to 2 feet.



LSZ266-041115-
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-
1010 PM EST Sat Dec 3 2022

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

REST OF TONIGHT
West winds to 30 knots with a few gale force
gusts to 35 knots. Freezing spray. Scattered snow showers. Waves 7
to 11 feet occasionally to 13 feet.

SUNDAY
West winds 20 to 30 knots becoming southwest gales to
40 knots by late afternoon. Freezing spray in the morning.
Scattered snow showers. Waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet.

SUNDAY NIGHT
Southwest gales to 40 knots becoming west gales
to 35 knots by midnight, then diminishing to 15 to 25 knots late.
A chance of snow showers. A chance of rain showers after
midnight. Waves building to 12 to 17 feet occasionally to
21 feet, then subsiding to 6 to 9 feet occasionally to 11 feet.

MONDAY
West winds 15 to 25 knots. A chance of snow showers.
Waves subsiding to 3 to 5 feet occasionally to 7 feet.

MONDAY NIGHT
Northwest winds 15 to 25 knots. A chance of snow
showers. Waves subsiding to 2 to 4 feet.

TUESDAY
Northwest winds 10 to 20 knots backing south in the
afternoon. Waves subsiding to calm to 2 feet.

TUESDAY NIGHT
South winds 10 to 20 knots veering southwest
after midnight. A chance of snow showers. Waves building to 1 to
3 feet.

WEDNESDAY
Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of snow showers. Waves building to 2 to
4 feet, then subsiding to calm to 2 feet.

THURSDAY
Southwest winds 10 to 20 knots. Waves calm to 2 feet.



LSZ267-041115-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1010 PM EST Sat Dec 3 2022

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

REST OF TONIGHT
West winds to 30 knots with a few gale force
gusts to 35 knots. Numerous snow showers late in the evening,
then scattered snow showers after midnight. Freezing spray after
midnight. Waves 7 to 10 feet occasionally to 13 feet.

SUNDAY
West winds to 30 knots with a few gale force gusts to 35
knots backing to southwest gales to 35 knots in the afternoon.
Freezing spray in the morning. Isolated snow showers. Waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet.

SUNDAY NIGHT
Southwest gales to 40 knots becoming west gales
to 35 knots by midnight, then diminishing to 20 to 30 knots late.
A chance of snow showers, possibly mixed with rain. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 7 to 10 feet occasionally to 13 feet.

MONDAY
West winds 15 to 25 knots. A chance of snow showers. A
chance of rain showers in the afternoon. Waves subsiding to 3 to
5 feet occasionally to 7 feet.

MONDAY NIGHT
Northwest winds 15 to 25 knots. A chance of snow
showers. Waves subsiding to 2 to 4 feet.

TUESDAY
Northwest winds 10 to 20 knots backing south in the
afternoon. Waves subsiding to calm to 2 feet.

TUESDAY NIGHT
South winds 10 to 20 knots. A chance of snow
showers. Waves calm to 2 feet.

WEDNESDAY
Northwest winds 10 to 20 knots veering north. A
chance of snow showers. Waves building to 2 to 4 feet, then
subsiding to calm to 2 feet.

THURSDAY
Southwest winds 10 to 20 knots. Waves calm to 2 feet.


LSZ261-041115-
MAFOR 0404/
Superior West...GALE WARNING IN EFFECT...14640 11540 11550 11560
11650. Waves 5 to 9 feet overnight building to 9 to 12 feet
Sunday. Waves 10 to 14 feet Sunday evening.

Superior North Central...GALE WARNING IN EFFECT...12640 19647
13640 19647 11550 19557 11560 11660. Waves 6 to 9 feet building
to 8 to 11 feet overnight, then to 10 to 13 feet Sunday. Waves 13
to 17 feet Sunday evening.

Superior South Central...GALE WARNING IN EFFECT...14640 12540
11550 11650. Waves 5 to 10 feet.

Superior East...GALE WARNING IN EFFECT...11647 11641 19647 12640
11640 19647 11540 12550. Waves 7 to 11 feet overnight subsiding to
6 to 9 feet Sunday. Waves 9 to 13 feet Sunday 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