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National Weather Service Marine Forecast FZUS63 KMQT

FZUS63 KMQT 230904
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
404 AM EST Sat Jan 23 2021

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
Ridging of 30.3 inches is moving over Lake Superior
today as the ridge axis looks to move east across the lake as well.
Weak 30.1 inch troughing should move over Lake Superior on
Sunday, followed by 30.2 inch ridging on Monday that strengthens
to 30.6 inches by late Wednesday of northern Lake Superior.

LSZ162-231715-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
404 AM EST Sat Jan 23 2021 /304 AM CST Sat Jan 23 2021/

EARLY THIS MORNING
West winds 10 to 20 knots. A chance of snow
showers. Waves 1 to 3 feet.

TODAY
West winds 10 to 20 knots backing south by mid
afternoon. A chance of snow showers. Waves subsiding to calm to
2 feet.

TONIGHT
South winds 15 to 25 knots. A chance of snow showers
in the evening, then snow showers after midnight. Waves building
to 2 to 4 feet.

SUNDAY
Southwest winds 15 to 25 knots veering northwest by mid
afternoon. A chance of snow showers in the morning. Waves 2 to
4 feet.

SUNDAY NIGHT
Northwest winds 10 to 20 knots veering north
after midnight. Waves subsiding to calm to 2 feet.

MONDAY
North winds 10 to 20 knots veering northeast in the
afternoon. Waves calm to 2 feet.

MONDAY NIGHT
Northeast winds 10 to 20 knots. Waves building to
1 to 3 feet.

TUESDAY
Northeast winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.

WEDNESDAY
East winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.



LSZ263-231715-
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-
404 AM EST Sat Jan 23 2021

EARLY THIS MORNING
Northwest winds 10 to 20 knots. A chance of
snow showers. Waves 2 to 4 feet.

TODAY
Northwest winds 10 to 20 knots veering north by late
morning, then becoming southwest 5 to 15 knots by mid afternoon.
A chance of snow showers. Waves subsiding to 1 to 3 feet.

TONIGHT
South winds 10 to 20 knots increasing to 15 to
25 knots by midnight. A chance of snow showers in the evening,
then snow showers after midnight. Waves building to 2 to 4 feet.

SUNDAY
Southwest winds 15 to 25 knots veering west. Snow
showers likely in the morning, then a chance of snow showers in
the afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.

SUNDAY NIGHT
Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. A slight chance of snow showers
after midnight. Waves subsiding to 1 to 3 feet.

MONDAY
North winds 10 to 20 knots becoming northeast 15 to
25 knots in the afternoon. Waves 1 to 3 feet.

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

TUESDAY
Northeast winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.

WEDNESDAY
Northeast winds 10 to 20 knots veering east. Waves
calm to 2 feet.



LSZ264-231715-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
404 AM EST Sat Jan 23 2021

EARLY THIS MORNING
Northwest winds 5 to 15 knots. A chance of
snow showers. Waves 1 to 3 feet.

TODAY
Northwest winds 5 to 15 knots veering north by mid
afternoon. A chance of snow showers. Waves subsiding to calm to
2 feet.

TONIGHT
Southeast winds 10 to 20 knots veering south by
midnight. A chance of snow showers in the evening, then snow
showers likely after midnight. Waves building to 2 to 4 feet.

SUNDAY
South winds 10 to 20 knots becoming southwest 15 to
25 knots by late morning, then veering west by mid afternoon.
Snow showers likely in the morning, then a chance of snow showers
in the afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.

SUNDAY NIGHT
Northwest winds 10 to 20 knots. A slight chance
of snow showers. Freezing spray after midnight. Waves subsiding
to 2 to 4 feet.

MONDAY
North winds 10 to 20 knots. Freezing spray in the
morning. Waves subsiding to 1 to 3 feet.

MONDAY NIGHT
North winds 10 to 20 knots. Freezing spray. A
chance of snow showers. Waves building to 2 to 4 feet.

TUESDAY
North winds 10 to 20 knots diminishing to 5 to
15 knots. Freezing spray. Waves subsiding to calm to 2 feet.

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



LSZ265-231715-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
404 AM EST Sat Jan 23 2021

EARLY THIS MORNING
West winds 15 to 25 knots. A chance of snow
showers. Waves 1 to 3 feet.

TODAY
West winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. A chance of snow showers. Waves subsiding to
calm to 2 feet.

TONIGHT
South winds 10 to 20 knots increasing to 15 to
25 knots late. A chance of snow showers in the evening, then snow
showers likely after midnight. Waves building to 1 to 3 feet.

SUNDAY
South winds 15 to 25 knots becoming southwest 10 to
20 knots by late morning, then veering west by mid afternoon.
Snow showers likely in the morning, then a chance of snow showers
in the afternoon. Waves building to 2 to 4 feet, then subsiding
to 1 to 3 feet.

SUNDAY NIGHT
West winds 15 to 25 knots veering northwest after
midnight. A slight chance of snow showers. Waves 1 to 3 feet.

MONDAY
North winds 10 to 20 knots. Waves 1 to 3 feet.

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

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

WEDNESDAY
Northeast winds 10 to 20 knots. Waves calm to
2 feet.



LSZ266-231715-
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-
404 AM EST Sat Jan 23 2021

EARLY THIS MORNING
West winds 10 to 20 knots. Snow showers
likely. Waves 2 to 4 feet.

TODAY
West winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. A chance of snow showers. Waves subsiding to
1 to 3 feet.

TONIGHT
Southwest winds 10 to 20 knots backing south by
midnight, then increasing to 15 to 25 knots late. A chance of
snow showers. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.

SUNDAY
South winds 15 to 25 knots veering southwest by late
morning, then becoming west 10 to 20 knots by mid afternoon. Snow
showers in the morning, then a chance of snow showers in the
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.

SUNDAY NIGHT
West winds 15 to 25 knots veering northwest after
midnight. A chance of snow showers. Freezing spray after
midnight. Waves 3 to 5 feet occasionally to 7 feet.

MONDAY
North winds 15 to 25 knots. Freezing spray in the
morning. Waves subsiding to 2 to 4 feet.

MONDAY NIGHT
North winds 15 to 25 knots veering northeast
after midnight. A chance of snow showers. Waves 2 to 4 feet.

TUESDAY
Northeast winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.

WEDNESDAY
Northeast winds 10 to 20 knots. Waves calm to
2 feet.



LSZ267-231715-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
404 AM EST Sat Jan 23 2021

EARLY THIS MORNING
Northeast winds 10 to 20 knots. Snow
showers likely. Waves 2 to 4 feet.

TODAY
East winds 10 to 20 knots becoming southwest 15 to
25 knots by late morning, then becoming west 10 to 20 knots by
mid afternoon. Snow showers in the morning, then a chance of snow
showers in the afternoon. Waves subsiding to 1 to 3 feet.

TONIGHT
West winds 10 to 20 knots backing south by midnight. A
chance of snow showers. Waves subsiding to calm to 2 feet, then
building to 1 to 3 feet.

SUNDAY
South winds 15 to 25 knots veering southwest by mid
afternoon. Snow showers likely. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.

SUNDAY NIGHT
Southwest winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight. A chance of snow showers. Waves
building to 3 to 5 feet occasionally to 7 feet.

MONDAY
Northwest winds 10 to 20 knots veering north in the
afternoon. Waves subsiding to 1 to 3 feet.

MONDAY NIGHT
Northeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves 1 to 3 feet.

TUESDAY
Northeast winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.

WEDNESDAY
Northeast winds 10 to 20 knots. Waves calm to
2 feet.



LSZ261-231715-
MAFOR 2310/
Superior West 12620 12520 13420 11427. Waves 1 to 3 feet.

Superior North Central 13710 11700 11210 11320 12420. A chance of
snow showers this morning and tonight. Waves 1 to 3 feet today.
Waves 1 to 3 feet building to 2 to 4 feet tonight.

Superior South Central 13620 11610 11600 11510 11410 11420. A
chance of snow showers this morning and overnight. Waves 2 to 4
feet subsiding to 1 to 3 feet today. Waves 1 to 3 feet tonight.

Superior East 11217 11327 11527 11727 11710 11610 11510 11420.
Waves 2 to 4 feet today. Waves 1 to 3 feet tonight.



BW

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

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