National Weather Service Marine Forecast FZUS63 KMQT
FZUS63 KMQT 210838
GLFLS
Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
338 AM EST Sat Dec 21 2024
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
30.7 inch high pressure near Thunder Bay Ontario this
morning will slowly meander east to New England by Sunday evening
while weakening to 30.6 inches. A 29.8 inch low pressure system
over southeast South Dakota Sunday evening will move to western
Wisconsin Monday morning while weakening to 29.9 inches and move to
lower Michigan while weakening further to 30.0 inches by Monday
evening. This feature slides into the Lower Great Lakes by
Tuesday morning, followed by ridging building to 30.3 inches the
rest of the day through Wednesday.
LSZ162-211645
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM
338 AM EST Sat Dec 21 2024 /238 AM CST Sat Dec 21 2024/
EARLY THIS MORNING
Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
TODAY
Northeast winds 5 to 15 knots veering east by late
morning, then veering south by mid afternoon. Isolated snow
showers in the afternoon. Waves calm to 2 feet.
TONIGHT
South winds 10 to 20 knots increasing to 15 to
25 knots by midnight. Waves building to 1 to 3 feet.
SUNDAY
South winds 15 to 25 knots diminishing to 10 to
20 knots. A slight chance of snow showers in the morning. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.
SUNDAY NIGHT
South winds 5 to 15 knots. A chance of snow
showers after midnight. Waves subsiding to calm to 2 feet.
MONDAY
Northeast winds 5 to 15 knots becoming north 10 to
20 knots in the afternoon. Waves calm to 2 feet.
MONDAY NIGHT
North winds 5 to 15 knots veering northeast after
midnight. Waves calm to 2 feet.
TUESDAY
Southwest winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.
WEDNESDAY
Southwest winds 10 to 20 knots. Waves calm to
2 feet.
Note, wave height forecasts are for ice free areas.
LSZ263-211645
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
338 AM EST Sat Dec 21 2024
EARLY THIS MORNING
North winds 5 to 15 knots. Isolated snow
showers. Waves 1 to 3 feet.
TODAY
Northeast winds 5 to 15 knots backing north by late
morning, then veering south by mid afternoon. Isolated snow
showers. Waves subsiding to calm to 2 feet.
TONIGHT
South winds 5 to 15 knots increasing to 10 to 20 knots
by midnight. Isolated snow showers in the evening. Waves building
to 2 to 4 feet.
SUNDAY
South winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
SUNDAY NIGHT
Southwest winds 10 to 20 knots becoming south
5 to 15 knots after midnight. A slight chance of snow showers
after midnight. Waves subsiding to calm to 2 feet.
MONDAY
Northeast winds 5 to 15 knots backing north in the
afternoon. Waves calm to 2 feet.
MONDAY NIGHT
North winds 5 to 15 knots. Waves calm to 2 feet.
TUESDAY
Southwest winds 5 to 15 knots increasing to 10 to
20 knots. Waves building to 1 to 3 feet.
WEDNESDAY
Southwest winds 10 to 20 knots backing south. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
Note, wave height forecasts are for ice free areas.
LSZ264-211645
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border
338 AM EST Sat Dec 21 2024
EARLY THIS MORNING
North winds 5 to 15 knots. Scattered snow
showers. Waves 2 to 4 feet.
TODAY
North winds 5 to 15 knots diminishing to less than
10 knots by late morning, then becoming northwest 5 to 15 knots
by mid afternoon. Isolated snow showers. Waves subsiding to calm
to 2 feet.
TONIGHT
South winds 5 to 15 knots increasing to 10 to 20 knots
by midnight. Isolated snow showers in the evening. Waves building
to 2 to 4 feet.
SUNDAY
South winds 10 to 20 knots increasing to 15 to
25 knots. Waves building to 3 to 5 feet occasionally to 7 feet.
SUNDAY NIGHT
Southwest winds 10 to 20 knots becoming south
5 to 15 knots after midnight. A slight chance of snow showers
after midnight. Waves subsiding to 1 to 3 feet.
MONDAY
Northeast winds 5 to 15 knots backing north in the
afternoon. Waves subsiding to calm to 2 feet.
MONDAY NIGHT
North winds 5 to 15 knots. Waves calm to 2 feet.
TUESDAY
Southwest winds 5 to 15 knots. Waves building to 1 to
3 feet.
WEDNESDAY
Southwest winds 5 to 15 knots backing south. Waves
1 to 3 feet.
Note, wave height forecasts are for ice free areas.
LSZ265-211645
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore
338 AM EST Sat Dec 21 2024
EARLY THIS MORNING
North winds 10 to 20 knots. Scattered snow
showers. Waves 3 to 6 feet occasionally to 8 feet.
TODAY
North winds 10 to 20 knots diminishing to 5 to 15 knots
by late morning, then backing west by mid afternoon. Scattered
snow showers. Waves subsiding to calm to 2 feet.
TONIGHT
Southwest winds 5 to 15 knots becoming south 10 to
20 knots by midnight, then increasing to 15 to 25 knots late.
Waves building to 1 to 3 feet.
SUNDAY
South winds 15 to 25 knots. Waves building to 2 to
4 feet.
SUNDAY NIGHT
South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A slight chance of snow showers after
midnight. Waves subsiding to calm to 2 feet.
MONDAY
South winds 5 to 15 knots becoming north 10 to 20 knots
in the afternoon. A chance of snow showers. Waves calm to 2 feet.
MONDAY NIGHT
North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
TUESDAY
Southwest winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.
WEDNESDAY
Southwest winds 10 to 20 knots backing south. Waves
calm to 2 feet.
Note, wave height forecasts are for ice free areas.
LSZ266-211645
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
338 AM EST Sat Dec 21 2024
EARLY THIS MORNING
North winds 15 to 25 knots. Scattered snow
showers. Waves 3 to 6 feet occasionally to 8 feet.
TODAY
North winds 10 to 20 knots diminishing to 5 to 15 knots.
Isolated snow showers. Waves subsiding to calm to 2 feet.
TONIGHT
Southeast winds 5 to 15 knots becoming south 10 to
20 knots by midnight, then increasing to 15 to 25 knots late.
Isolated snow showers. Waves building to 2 to 4 feet.
SUNDAY
South winds 15 to 25 knots increasing to 20 to
30 knots. A slight chance of snow showers in the afternoon. Waves
building to 5 to 8 feet occasionally to 10 feet.
SUNDAY NIGHT
South winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. A chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
MONDAY
South winds 5 to 15 knots backing northeast in the
afternoon. A chance of snow showers. Waves subsiding to calm to
2 feet.
MONDAY NIGHT
North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
TUESDAY
South winds 5 to 15 knots becoming southwest 10 to
20 knots. Waves calm to 2 feet.
WEDNESDAY
Southwest winds 10 to 20 knots backing south. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
Note, wave height forecasts are for ice free areas.
LSZ267-211645
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border
338 AM EST Sat Dec 21 2024
EARLY THIS MORNING
North winds 15 to 25 knots. Scattered snow
showers. Waves 3 to 5 feet occasionally to 7 feet.
TODAY
North winds 15 to 25 knots diminishing to 10 to
20 knots. Isolated snow showers. Waves subsiding to calm to
2 feet.
TONIGHT
North winds 5 to 15 knots veering south by midnight,
then increasing to 10 to 20 knots late. Isolated snow showers.
Waves building to 1 to 3 feet.
SUNDAY
South winds 15 to 25 knots increasing to 20 to
30 knots. A chance of snow showers in the afternoon. Waves
building to 3 to 6 feet occasionally to 8 feet.
SUNDAY NIGHT
South winds 20 to 30 knots. A chance of snow
showers. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.
MONDAY
South winds 10 to 20 knots backing southeast in the
afternoon. Snow showers likely in the morning, then a chance of
snow showers in the afternoon. Waves subsiding to calm to 2 feet.
MONDAY NIGHT
Northeast winds 10 to 20 knots. Waves calm to
2 feet.
TUESDAY
South winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.
WEDNESDAY
Southwest winds 10 to 20 knots backing south. Waves
building to 1 to 3 feet.
Note, wave height forecasts are for ice free areas.
LSZ261-211645
MAFOR 2110/
Superior West 11110 11100 11300 11400 12410 12420. Waves 3 feet
or less.
Superior North Central 11810 19817 11810 12800 11400 11410 12420. Waves calm to 4 feet.
Superior South Central 11820 19827 11810 19817 11800 19807 11800 11700 11500 12420. Waves 1 to 6 feet.
Superior East 12820 11810 12800 11100 11400 11420. Waves calm to 4 feet.
07
Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable
Graphical marine forecasts are available online at: weather.gov/greatlakes
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