National Weather Service Marine Forecast FZUS63 KMQT
FZUS63 KMQT 210230
GLFLS
Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
930 PM EST Wed Nov 20 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
A 29.4 inch low is over the St Marys River tonight.
As this low spins over the Great Lakes region, it briefly deepens
to 29.3 inches Thursday before phasing with a deepening low of
near 29.2 inches over New England on Friday. Meanwhile, broad high
pressure over the western CONUS will extend 30.1 inch ridging
over western Lake Superior Friday into Saturday before high
pressure weakens as it shifts to the Southeast U.S. on Saturday.
Sunday, Lake Superior will be between high pressures of 30.1
inches over the Southeast and Canadian Prairie respectively, a low
pressure of 29.1 inches over the Canadian Maritimes, and a
developing 29.6 inch low over the Southern Plains. Monday, the
Southern Plains low will arrive in the Great Lakes at around 29.7
inches.
LSZ162-211030
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM
930 PM EST Wed Nov 20 2024 /830 PM CST Wed Nov 20 2024/
GALE WARNING IN EFFECT FROM 5 AM EST /4 AM CST/ THURSDAY THROUGH THURSDAY AFTERNOON
REST OF TONIGHT
Northwest winds 10 to 20 knots becoming north
15 to 25 knots by midnight, then increasing to gales to 35 knots
late. A slight chance of snow showers late in the evening. A
slight chance of rain showers. Waves calm to 2 feet building to
5 to 8 feet occasionally to 10 feet.
THURSDAY
North gales to 40 knots. A slight chance of rain
showers in the morning. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
THURSDAY NIGHT
North winds 20 to 30 knots diminishing to 15 to
25 knots late. A slight chance of rain showers. Waves subsiding
to 1 to 3 feet.
FRIDAY
Northwest winds 15 to 25 knots. A slight chance of rain
showers. Waves 1 to 3 feet.
FRIDAY NIGHT
Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
SATURDAY
Northwest winds 10 to 20 knots. Waves calm to 2 feet.
SATURDAY NIGHT
North winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
SUNDAY
East winds 10 to 20 knots. A chance of rain and snow
showers. Waves calm to 2 feet.
MONDAY
Northwest winds 15 to 25 knots. A chance of rain
showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
LSZ263-211030
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
930 PM EST Wed Nov 20 2024
GALE WARNING IN EFFECT FROM 5 AM EST THURSDAY THROUGH THURSDAY AFTERNOON
REST OF TONIGHT
Northwest winds 5 to 15 knots increasing to
15 to 25 knots by midnight, then becoming north gales to 35 knots
late. A slight chance of snow showers late in the evening. A
chance of rain showers. Waves calm to 2 feet building to 7 to
10 feet occasionally to 13 feet.
THURSDAY
North gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. A chance of rain showers. Waves building to
9 to 12 feet occasionally to 15 feet, then subsiding to 6 to
9 feet occasionally to 11 feet.
THURSDAY NIGHT
North winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. A slight chance of rain showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
FRIDAY
North winds 15 to 25 knots backing northwest in the
afternoon. A slight chance of rain showers. Waves subsiding to
1 to 3 feet.
FRIDAY NIGHT
Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet.
SATURDAY
Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
SATURDAY NIGHT
Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
SUNDAY
East winds 5 to 15 knots. A chance of snow showers. A
chance of rain showers. Waves building to 1 to 3 feet.
MONDAY
Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of rain showers. A chance of snow showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
LSZ264-211030
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border
930 PM EST Wed Nov 20 2024
GALE WARNING IN EFFECT FROM 2 AM EST THURSDAY THROUGH THURSDAY AFTERNOON
REST OF TONIGHT
Northwest winds 15 to 25 knots becoming north
20 to 30 knots by midnight, then increasing to gales to 35 knots
late. A chance of rain showers. Waves 1 to 3 feet building to
8 to 11 feet occasionally to 14 feet.
THURSDAY
North gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. A chance of rain showers. Waves building to
10 to 14 feet occasionally to 18 feet, then subsiding to 6 to
9 feet occasionally to 11 feet.
THURSDAY NIGHT
North winds 15 to 25 knots increasing to 20 to
30 knots by midnight, then diminishing to 15 to 25 knots late. A
slight chance of rain showers. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
FRIDAY
North winds 15 to 25 knots. A slight chance of rain
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
FRIDAY NIGHT
Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves 3 to 5 feet occasionally to
7 feet.
SATURDAY
Northwest winds 10 to 20 knots. Waves subsiding to
1 to 3 feet.
SATURDAY NIGHT
Northwest winds 5 to 15 knots. Waves subsiding
to calm to 2 feet.
SUNDAY
North winds 5 to 15 knots. A chance of rain showers.
Waves building to 1 to 3 feet.
MONDAY
Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of rain showers. Waves building to 2 to
4 feet.
LSZ265-211030
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore
930 PM EST Wed Nov 20 2024
GALE WARNING IN EFFECT FROM 1 AM EST THURSDAY THROUGH THURSDAY AFTERNOON
REST OF TONIGHT
Northwest winds 15 to 25 knots increasing to
gales to 35 knots by midnight, then becoming north gales to
40 knots late. Rain showers. Waves 1 to 3 feet building to 10 to
14 feet occasionally to 18 feet.
THURSDAY
North gales to 40 knots. Showers. Waves subsiding to
7 to 10 feet occasionally to 13 feet.
THURSDAY NIGHT
North winds 20 to 30 knots increasing to gales
to 35 knots by midnight, then diminishing to 20 to 30 knots late.
A chance of rain showers in the evening, then rain showers likely
after midnight. Waves subsiding to 4 to 7 feet occasionally to
9 feet.
FRIDAY
North winds 20 to 30 knots backing northwest in the
afternoon. Showers likely in the morning, then a chance of
showers in the afternoon. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
FRIDAY NIGHT
Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Rain showers likely in the
evening, then a chance of rain showers after midnight. Waves
subsiding to 2 to 4 feet.
SATURDAY
Northwest winds 15 to 25 knots. A chance of rain
showers, possibly mixed with snow. Waves subsiding to 1 to
3 feet.
SATURDAY NIGHT
Northwest winds 5 to 15 knots. Waves subsiding
to calm to 2 feet.
SUNDAY
West winds 5 to 15 knots increasing to 10 to 20 knots.
A chance of rain showers, then rain showers likely. Waves calm to
2 feet.
MONDAY
West winds 10 to 20 knots becoming northwest 15 to
25 knots. Rain showers likely. A chance of snow showers. Waves
building to 1 to 3 feet.
LSZ266-211030
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
930 PM EST Wed Nov 20 2024
GALE WARNING IN EFFECT FROM 1 AM EST THURSDAY THROUGH THURSDAY AFTERNOON
REST OF TONIGHT
Northwest winds 20 to 30 knots becoming north
gales to 40 knots by midnight. Rain showers. Waves 3 to 5 feet
occasionally to 7 feet building to 10 to 14 feet occasionally to
18 feet.
THURSDAY
North gales to 40 knots becoming northeast gales to
35 knots by late morning, then becoming north 20 to 30 knots by
mid afternoon. Showers in the morning, then a chance of showers
in the afternoon. Waves subsiding to 7 to 10 feet occasionally to
13 feet.
THURSDAY NIGHT
North winds 20 to 30 knots. A chance of rain
showers. Waves subsiding to 4 to 7 feet occasionally to 9 feet.
FRIDAY
North winds 20 to 30 knots. Showers. Waves subsiding to
3 to 6 feet occasionally to 8 feet.
FRIDAY NIGHT
Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Rain showers likely. Waves 3 to
6 feet occasionally to 8 feet.
SATURDAY
Northwest winds 15 to 25 knots. A chance of rain
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
SATURDAY NIGHT
Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. A chance of rain and snow showers.
Waves subsiding to calm to 2 feet.
SUNDAY
West winds 10 to 20 knots. A chance of rain showers,
then rain showers likely. Waves calm to 2 feet.
MONDAY
West winds 10 to 20 knots becoming northwest 15 to
25 knots. A chance of rain showers, then rain showers likely.
Waves building to 2 to 4 feet.
LSZ267-211030
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border
930 PM EST Wed Nov 20 2024
GALE WARNING IN EFFECT FROM 5 AM EST THURSDAY THROUGH THURSDAY MORNING
REST OF TONIGHT
Northwest winds 15 to 25 knots becoming north
20 to 30 knots by midnight, then becoming northeast gales to
35 knots late. Showers. Waves 3 to 5 feet occasionally to 7 feet
building to 7 to 10 feet occasionally to 13 feet.
THURSDAY
Northeast gales to 35 knots diminishing to 15 to
25 knots. Showers in the morning, then a slight chance of showers
in the afternoon. Waves building to 8 to 11 feet occasionally to
14 feet, then subsiding to 3 to 5 feet occasionally to 7 feet.
THURSDAY NIGHT
North winds 15 to 25 knots increasing to 20 to
30 knots by midnight. A chance of rain showers. Waves building to
3 to 6 feet occasionally to 8 feet.
FRIDAY
North winds 15 to 25 knots. Showers. Waves 3 to 6 feet
occasionally to 8 feet.
FRIDAY NIGHT
North winds 15 to 25 knots backing northwest
after midnight. Rain showers likely. Waves 3 to 6 feet
occasionally to 8 feet.
SATURDAY
Northwest winds 15 to 25 knots. A chance of rain
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
SATURDAY NIGHT
Northwest winds 10 to 20 knots. A chance of
rain and snow showers. Waves subsiding to 1 to 3 feet.
SUNDAY
West winds 10 to 20 knots. A chance of rain showers,
then rain showers likely. Waves subsiding to calm to 2 feet.
MONDAY
West winds 10 to 20 knots veering northwest. Rain
showers. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
LSZ261-211030
MAFOR 2104/ Superior West...GALE WARNING IN EFFECT...11720 11740 13850 12840 11830. Waves 1 to 2 feet building to 4 to 7 feet overnight. Waves 5 to 9 feet Thursday. Waves 4 to 7 feet subsiding to 3 to 6 feet Thursday evening.
Superior North Central...GALE WARNING IN EFFECT...11840 14850 12840 11830. A chance of showers overnight and Thursday. Waves 2 to 4 feet building to 7 to 10 feet overnight. Waves 9 to 13 feet subsiding to 7 to 10 feet Thursday. Waves 5 to 9 feet Thursday evening.
Superior South Central...GALE WARNING IN EFFECT...11756 14856 11846 11840 11830. Waves 3 to 5 feet building to 9 to 12 feet overnight. Waves 10 to 14 feet Thursday. Waves 6 to 10 feet Thursday evening.
Superior East...GALE WARNING IN EFFECT...11846 13156 11146 12130 11820. Waves 4 to 7 feet building to 6 to 9 feet overnight. Waves 7 to 11 feet subsiding to 4 to 7 feet Thursday. Waves 3 to 6 feet Thursday evening.
GS
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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