fzus63 kmqt 222101
glfls 
expires:202511230900;;326298

open lake forecast for lake superior
national weather service marquette mi
400 pm est sat nov 22 2025

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 weak 29.0 inch low track se across lake superior tonight through 
early sunday. the weak low presses east and weakens to 29.0 inches 
while 30.0 inch ridging returns overhead lake superior through 
monday. broad 29.9 inch low pressure then emanates out of the plains 
and northern rockies before deepening to near 29.4 inch low pressure 
over lake superior wednesday. this low then deepens to near 29.1 
inches while ascending north into quebec thursday while 30.4 inch 
high pressure returns to the plains. this creates a strong pressure 
gradient over lake superior thursday and friday before the pressure 
gradient slackens as the high pressure moves into the great lakes.



lsz162-230900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est sat nov 22 2025 /300 pm cst sat nov 22 2025/

.late this afternoon...west winds 20 to 30 knots. waves 2 to
4 feet. 
.tonight...west winds 20 to 30 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.sunday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.sunday night...southwest winds 10 to 20 knots. waves calm to
2 feet. 
.monday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. a slight chance of rain showers in the
afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots backing northeast after
midnight. a chance of rain showers in the evening, then rain
showers likely after midnight. waves calm to 2 feet. 
.tuesday...northeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. rain showers. waves building to 2 to
4 feet. 
.tuesday night...north winds 20 to 30 knots. rain showers,
possibly mixed with snow. waves building to 3 to 6 feet
occasionally to 8 feet. 
.wednesday...northwest gales to 35 knots. snow showers likely,
then a chance of snow showers. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.thursday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 222101
glfls 
expires:202511230900;;326299

open lake forecast for lake superior
national weather service marquette mi
400 pm est sat nov 22 2025

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 weak 29.0 inch low track se across lake superior tonight through 
early sunday. the weak low presses east and weakens to 29.0 inches 
while 30.0 inch ridging returns overhead lake superior through 
monday. broad 29.9 inch low pressure then emanates out of the plains 
and northern rockies before deepening to near 29.4 inch low pressure 
over lake superior wednesday. this low then deepens to near 29.1 
inches while ascending north into quebec thursday while 30.4 inch 
high pressure returns to the plains. this creates a strong pressure 
gradient over lake superior thursday and friday before the pressure 
gradient slackens as the high pressure moves into the great lakes.



lsz263-230900-
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-
400 pm est sat nov 22 2025

.late this afternoon...west winds 15 to 25 knots. a slight chance
of rain showers. waves 2 to 4 feet. 
.tonight...west winds 20 to 30 knots veering northwest by
midnight. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.sunday...west winds 15 to 25 knots diminishing to 10 to 20 knots
by late morning, then backing southwest by mid afternoon. waves
subsiding to 1 to 3 feet. 
.sunday night...southwest winds 5 to 15 knots increasing to 10 to
20 knots late. waves subsiding to calm to 2 feet. 
.monday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. a slight chance of rain showers in the
afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots. a chance of rain
showers in the evening, then rain showers likely after midnight.
waves calm to 2 feet. 
.tuesday...northeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. rain showers. waves building to 3 to
6 feet occasionally to 8 feet. 
.tuesday night...north winds 20 to 30 knots increasing to gales
to 35 knots after midnight. rain showers, possibly mixed with
snow. waves building to 6 to 9 feet occasionally to 11 feet. 
.wednesday...northwest gales to 40 knots. snow showers likely,
then a chance of snow showers. waves building to 6 to 10 feet
occasionally to 13 feet. 
.thursday...northwest gales to 35 knots diminishing to 20 to
30 knots. waves subsiding to 3 to 5 feet occasionally to 7 feet. 

$$