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National Weather Service Marine Forecast FZUS63 KMQT

FZUS63 KMQT 251419
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1019 AM EDT Wed May 25 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
High pressure at 30.3 inches will remain over the
lake this afternoon, before a 29.7 inch low pressure system moves
into the Upper Great Lakes late tonight. The low will pass into
northern Ontario Thursday night. A broad 29.9 inch ridge will set
up over the lake by early Friday morning and persist into Saturday
mid-day. Troughing around 29.6 inches over the central United
States will shift eastward into the Great Lakes by Sunday as a
29.5 inch low pressure is located in far northwestern Ontario by
Sunday night.

&&

LSZ162-252230-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1019 AM EDT Wed May 25 2022 /919 AM CDT Wed May 25 2022/

REST OF TODAY
East winds 10 to 20 knots backing northeast in
the afternoon, then increasing to 20 to 30 knots with a few gale
gusts to 35 knots late. A chance of rain by late morning, then
rain by mid afternoon. Waves calm to 2 feet building to 3 to 5
feet occasionally to 7 feet.

TONIGHT
Northeast winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 15 to 25 knots after
midnight, then becoming north 10 to 20 knots late. Patchy fog.
Rain through midnight. A chance of rain after midnight. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 5 feet occasionally to 7 feet.

THURSDAY
North winds 5 to 15 knots backing west late. Waves
subsiding to calm to 2 feet.

THURSDAY NIGHT
West winds 5 to 15 knots veering northwest
after midnight. Waves calm to 2 feet.

FRIDAY
West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.

FRIDAY NIGHT
West winds 5 to 15 knots backing southwest after
midnight. Waves calm to 2 feet.

SATURDAY
East winds 5 to 15 knots increasing to 10 to
20 knots. A chance of rain showers. Waves calm to 2 feet.

SUNDAY
East winds 10 to 20 knots veering southwest. A chance
of rain showers. Waves calm to 2 feet.



LSZ263-252230-
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-
1019 AM EDT Wed May 25 2022

REST OF TODAY
Southeast winds 10 to 20 knots backing east in
the afternoon, then becoming northeast 20 to 30 knots late. A
chance of rain by late morning, then rain by mid afternoon. Waves
calm to 2 feet building to 3 to 5 feet occasionally to 7 feet.

TONIGHT
Northeast winds 20 to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 15 to 25 knots after
midnight, then backing north late. Patchy fog. Rain through
midnight. A chance of rain after midnight. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

THURSDAY
North winds 10 to 20 knots becoming northwest 5 to
15 knots in the afternoon, then backing west late. Waves
subsiding to calm to 2 feet.

THURSDAY NIGHT
West winds 5 to 15 knots veering northwest
after midnight. Waves calm to 2 feet.

FRIDAY
West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.

FRIDAY NIGHT
Southwest winds 5 to 15 knots. Waves calm to
2 feet.

SATURDAY
East winds 10 to 20 knots veering southeast. A chance
of rain showers. Waves building to 1 to 3 feet.

SUNDAY
Southeast winds 10 to 20 knots veering south. A chance
of showers. Waves 1 to 3 feet.



LSZ264-252230-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1019 AM EDT Wed May 25 2022

REST OF TODAY
Southeast winds 5 to 15 knots becoming northeast
15 to 25 knots late. A chance of rain. Waves calm to 2 feet
building to 2 to 4 feet.

TONIGHT
Northeast winds 20 to 30 knots becoming north 15 to
25 knots late. Patchy fog. Rain through midnight. A chance of
rain after midnight. Waves building to 3 to 6 feet occasionally to
8 feet.

THURSDAY
North winds 10 to 20 knots becoming northwest 5 to
15 knots in the afternoon. Waves subsiding to calm to 2 feet.

THURSDAY NIGHT
Northwest winds 5 to 15 knots. Waves calm to
2 feet.

FRIDAY
Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.

FRIDAY NIGHT
Southwest winds 5 to 15 knots. Waves calm to
2 feet.

SATURDAY
South winds 5 to 15 knots becoming southeast 10 to
20 knots. Waves building to 1 to 3 feet.

SUNDAY
Southeast winds 10 to 20 knots veering south. A chance
of rain showers. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.



LSZ265-252230-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1019 AM EDT Wed May 25 2022

REST OF TODAY
Southeast winds 10 to 20 knots backing east in
the afternoon, then becoming northeast 20 to 30 knots late.
Sprinkles by late morning, then rain by mid afternoon. Waves calm
to 2 feet building to 3 to 5 feet occasionally to 7 feet.

TONIGHT
East winds 20 to 30 knots becoming northeast 15 to
25 knots after midnight, then becoming northwest 10 to 20 knots
late. Patchy dense fog. Rain through midnight. A chance of rain
after midnight. Waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet.

THURSDAY
West winds 10 to 20 knots veering northwest in the
afternoon. A slight chance of rain showers through early
afternoon. Waves subsiding to calm to 2 feet.

THURSDAY NIGHT
Northwest winds 10 to 20 knots. Waves calm to
2 feet.

FRIDAY
Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.

FRIDAY NIGHT
Southwest winds 5 to 15 knots. Waves calm to
2 feet.

SATURDAY
Southeast winds 5 to 15 knots becoming south 15 to
25 knots. Waves building to 1 to 3 feet.

SUNDAY
Southeast winds 15 to 25 knots veering south. A chance
of showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.



LSZ266-252230-
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-
1019 AM EDT Wed May 25 2022

REST OF TODAY
Southeast winds 10 to 20 knots backing east in
the afternoon, then becoming northeast 15 to 25 knots late.
Sprinkles by late morning, then a chance of rain by mid
afternoon. Waves calm to 2 feet building to 3 to 5 feet
occasionally to 7 feet.

TONIGHT
East winds 20 to 30 knots becoming northeast 15 to
25 knots late. Patchy dense fog. Rain through midnight. A chance
of rain after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.

THURSDAY
West winds 10 to 20 knots veering northwest in the
afternoon. A slight chance of rain showers. Waves subsiding to
1 to 3 feet.

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

FRIDAY
Northwest winds 10 to 20 knots. Waves calm to 2 feet.

FRIDAY NIGHT
West winds 5 to 15 knots becoming southwest 10 to
20 knots after midnight. Waves calm to 2 feet.

SATURDAY
South winds 10 to 20 knots increasing to 15 to
25 knots. Waves building to 1 to 3 feet.

SUNDAY
South winds 15 to 25 knots. A chance of rain showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.



LSZ267-252230-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1019 AM EDT Wed May 25 2022

REST OF TODAY
East winds 10 to 20 knots increasing to 15 to
25 knots late. Sprinkles by late morning, then a chance of rain
by mid afternoon. Waves calm to 2 feet building to 2 to 4 feet.

TONIGHT
East winds 20 to 30 knots becoming southeast 15 to
25 knots late. Patchy dense fog. Rain. A slight chance of
thunderstorms after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.

THURSDAY
West winds 10 to 20 knots. A chance of rain showers.
Waves subsiding to calm to 2 feet.

THURSDAY NIGHT
Northwest winds 10 to 20 knots veering north
after midnight. A slight chance of rain showers. Waves calm to
2 feet.

FRIDAY
Northwest winds 10 to 20 knots. Waves calm to 2 feet.

FRIDAY NIGHT
Northwest winds 5 to 15 knots backing west after
midnight. Waves calm to 2 feet.

SATURDAY
Southeast winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.

SUNDAY
South winds 15 to 25 knots. A chance of showers. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.


LSZ261-252230-
MAFOR 2515/
Superior West 11216 11126 13146 11130 11820 11810. Waves 1 to 3
feet this afternoon. Waves 3 to 6 feet building to 4 to 7 feet
tonight. Waves 3 to 5 feet Thursday morning.

Superior North Central 11310 11220 11136 12146 11136 19134 11830
11820. Waves 1 to 2 feet this afternoon. Waves 2 to 4 feet
building to 3 to 6 feet tonight. Waves 4 to 6 feet Thursday
morning.

Superior South Central 11210 11120 11146 12246 11126 19124 11710
11620. Waves 1 to 2 feet building to 2 to 4 feet this afternoon.
Waves 3 to 6 feet tonight and Thursday morning.

Superior East 11210 11220 11136 12246 11246 19244 11420 19424
11610. A chance of rain showers Thursday morning. Waves 1 to 3
feet this afternoon. Waves 2 to 3 feet building to 3 to 5 feet
tonight. Waves 2 to 4 feet Thursday morning.



Voss

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

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