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National Weather Service Marine Forecast FZUS63 KMQT

FZUS63 KMQT 250233
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
933 PM EST Tue Nov 24 2020

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 29.6 inch low pressure system over eastern Kansas
is lifting towards the Great Lakes region tonight, skirting Lower
Michigan Wednesday night. Behind this low, another trough of 29.8
inches will move through Lake Superior on Thursday. This trough
will be replaced by a weak 30.0 inch ridge Friday. On Saturday, a
29.6 inch low pressure will move east off the Alberta Rockies and
arrive at Lake Superior on Sunday.

LSZ162-251045-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
933 PM EST Tue Nov 24 2020 /833 PM CST Tue Nov 24 2020/

REST OF TONIGHT
Southwest winds 10 to 20 knots veering west by
midnight, then becoming northwest 5 to 15 knots late. A slight
chance of rain showers late in the evening. Waves 2 to 4 feet
subsiding to calm to 2 feet.

WEDNESDAY
North winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.

WEDNESDAY NIGHT
South winds 5 to 15 knots veering southwest by
midnight, then increasing to 10 to 20 knots late. Waves building
to 1 to 3 feet.

THURSDAY
Southwest winds 15 to 25 knots veering west in the
afternoon. Waves building to 2 to 4 feet.

THURSDAY NIGHT
West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to calm to 2 feet.

FRIDAY
West winds 10 to 20 knots. Waves building to 1 to
3 feet.

FRIDAY NIGHT
West winds 15 to 25 knots. Waves building to 2 to
4 feet.

SATURDAY
West winds 15 to 25 knots backing southwest. Waves
subsiding to calm to 2 feet, then building to 2 to 4 feet.

SUNDAY
Northwest winds 15 to 25 knots. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.



LSZ263-251045-
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-
933 PM EST Tue Nov 24 2020

REST OF TONIGHT
South winds 15 to 25 knots becoming west 10 to
20 knots by midnight, then diminishing to 5 to 15 knots late. A
slight chance of rain showers. Waves 3 to 5 feet occasionally to
7 feet 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
South winds 5 to 15 knots veering southwest by
midnight, then increasing to 10 to 20 knots late. Waves calm to
2 feet.

THURSDAY
Southwest winds 15 to 25 knots. Waves building to
3 to 5 feet occasionally to 7 feet.

THURSDAY NIGHT
West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet.

FRIDAY
West winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. Waves 1 to 3 feet.

FRIDAY NIGHT
West winds 15 to 25 knots. Waves building to 3 to
5 feet occasionally to 7 feet.

SATURDAY
West winds 15 to 25 knots backing southwest. Waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet.

SUNDAY
West winds 15 to 25 knots becoming north 20 to
30 knots. Waves building to 3 to 5 feet occasionally to 7 feet.



LSZ264-251045-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
933 PM EST Tue Nov 24 2020

REST OF TONIGHT
South winds 15 to 25 knots becoming southwest
10 to 20 knots by midnight, then becoming west 5 to 15 knots
late. A chance of rain showers. Waves 5 to 8 feet occasionally to
10 feet subsiding to 2 to 4 feet.

WEDNESDAY
Northwest winds 5 to 15 knots diminishing to less
than 10 knots by late morning, then backing west by mid
afternoon. Waves subsiding to calm to 2 feet.

WEDNESDAY NIGHT
South winds 5 to 15 knots veering southwest
late. Waves building to 1 to 3 feet.

THURSDAY
Southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.

THURSDAY NIGHT
West winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.

FRIDAY
Northwest winds 5 to 15 knots becoming west 10 to
20 knots in the afternoon. Waves 1 to 3 feet.

FRIDAY NIGHT
West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.

SATURDAY
West winds 15 to 25 knots becoming southwest 10 to
20 knots. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.

SUNDAY
West winds 15 to 25 knots veering north. Waves building
to 3 to 6 feet occasionally to 8 feet.



LSZ265-251045-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
933 PM EST Tue Nov 24 2020

REST OF TONIGHT
South winds 15 to 25 knots veering southwest
by midnight, then becoming west 10 to 20 knots late. A chance of
rain showers. Waves 3 to 6 feet occasionally to 8 feet subsiding
to calm to 2 feet.

WEDNESDAY
Northwest winds 5 to 15 knots. Waves calm to 2 feet.

WEDNESDAY NIGHT
East winds 5 to 15 knots veering south by
midnight, then becoming southwest 10 to 20 knots late. Waves calm
to 2 feet.

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

THURSDAY NIGHT
West winds 10 to 20 knots. Waves building to
1 to 3 feet.

FRIDAY
West winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. Waves subsiding to calm to 2 feet, then
building to 1 to 3 feet.

FRIDAY NIGHT
West winds 15 to 25 knots. Waves building to 2 to
4 feet.

SATURDAY
West winds 15 to 25 knots becoming southwest 10 to
20 knots. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.

SUNDAY
West winds 15 to 25 knots becoming northwest 20 to
30 knots. Waves building to 3 to 6 feet occasionally to 8 feet.



LSZ266-251045-
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-
933 PM EST Tue Nov 24 2020

REST OF TONIGHT
South winds 20 to 30 knots diminishing to
15 to 25 knots by midnight, then becoming west 10 to 20 knots
late. Patchy fog. Rain showers likely late in the evening. A
chance of rain showers after midnight. Waves 5 to 8 feet
occasionally to 10 feet subsiding to 2 to 4 feet.

WEDNESDAY
Northwest winds 5 to 15 knots veering north by mid
afternoon. Waves subsiding to calm to 2 feet.

WEDNESDAY NIGHT
East winds 5 to 15 knots veering south by
midnight, then veering southwest late. Patchy fog after midnight.
Waves calm to 2 feet.

THURSDAY
Southwest winds 10 to 20 knots. Waves building to
3 to 5 feet occasionally to 7 feet.

THURSDAY NIGHT
West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 2 to 4 feet.

FRIDAY
Northwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon. Waves 2 to 4 feet.

FRIDAY NIGHT
West winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet.

SATURDAY
West winds 15 to 25 knots backing southwest. Waves
subsiding to 1 to 3 feet.

SUNDAY
West winds 15 to 25 knots becoming northwest 20 to
30 knots. Waves building to 4 to 7 feet occasionally to 9 feet.



LSZ267-251045-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
933 PM EST Tue Nov 24 2020

REST OF TONIGHT
South winds 20 to 30 knots diminishing to
10 to 20 knots. Rain showers, possibly mixed with snow late in
the evening, then a chance of rain showers after midnight. Patchy
fog after midnight. Waves 3 to 6 feet occasionally to 8 feet
subsiding to 1 to 3 feet.

WEDNESDAY
West winds 5 to 15 knots veering north by mid
afternoon. A slight chance of rain in the morning. Waves
subsiding to calm to 2 feet.

WEDNESDAY NIGHT
East winds 5 to 15 knots veering south late.
Patchy fog after midnight. Waves calm to 2 feet.

THURSDAY
Southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Patchy fog in the morning. Waves
building to 1 to 3 feet.

THURSDAY NIGHT
Southwest winds 10 to 20 knots veering west
after midnight. Waves building to 2 to 4 feet.

FRIDAY
Northwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon. Waves 2 to 4 feet.

FRIDAY NIGHT
West winds 15 to 25 knots. Waves building to 3 to
5 feet occasionally to 7 feet.

SATURDAY
West winds 15 to 25 knots backing southwest. Waves
subsiding to 1 to 3 feet.

SUNDAY
Southwest winds 15 to 25 knots becoming northwest 20 to
30 knots. A chance of snow showers and drizzle. Waves building to
4 to 7 feet occasionally to 9 feet.


LSZ261-251045-
MAFOR 2504/
Superior West 12610 11700 11800 11100 12500 11400. Waves 2 feet
or less.

Superior North Central 11520 11620 11710 13700 11500 11400. A
chance of rain showers overnight. Waves 3 to 7 feet overnight.
Waves 1 to 4 feet Wednesday. Waves 1 foot or less Wednesday
evening.

Superior South Central 11430 11520 11610 12700 11800 11100 11300.
A chance of rain showers overnight. Waves 1 to 5 feet overnight.
Waves 2 feet or less Wednesday and Wednesday evening.

Superior East 11436 11420 11510 11600 11500 11700 11100 11200.
Waves 3 to 6 feet overnight. Waves 1 to 3 feet Wednesday and
Wednesday evening.



TAP

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes