fzus63 kmqt 070301
glfls 
expires:202511070900;;975630

open lake forecast for lake superior
national weather service marquette mi
1001 pm est thu nov 6 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 29.5 inch low over minnesota this evening will move across upper 
michigan tonight to near whitefish bay at 29.3 inches by late friday 
morning. ridging will build over the lake this weekend as the low 
exits into quebec and 30.6 inch high pressure develops over the 
great plains, with the ridge over the lake strengthening from 29.8 
inches on saturday to 30.2 inches through sunday night. the ridge 
quickly breaks down early next week as a 29.4 inch trough sweeps 
across the lake on tuesday.



lsz162-070900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm est thu nov 6 2025 /901 pm cst thu nov 6 2025/

.rest of tonight...southeast winds 10 to 20 knots backing north
late. a chance of rain showers. waves 1 to 3 feet building to
2 to 4 feet, then subsiding to calm to 2 feet. 
.friday...north winds 15 to 25 knots increasing to 20 to 30 knots
by late morning, then diminishing to 15 to 25 knots by mid
afternoon. a chance of rain showers, possibly mixed with snow.
waves building to 3 to 6 feet occasionally to 8 feet, then
subsiding to 2 to 4 feet. 
.friday night...north winds 10 to 20 knots diminishing to 5 to
15 knots by midnight. waves subsiding to calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. waves calm to 2 feet. 
.saturday night...northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a slight chance of snow showers.
waves building to 3 to 5 feet occasionally to 7 feet. 
.sunday...north winds 20 to 30 knots. a chance of snow showers.
waves building to 3 to 6 feet occasionally to 8 feet. 
.sunday night...north winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. waves subsiding to 2 to 4 feet. 
.monday...northwest winds 15 to 25 knots becoming southwest 20 to
30 knots. waves subsiding to calm to 2 feet, then building to
3 to 5 feet occasionally to 7 feet. 
.tuesday...southwest winds 20 to 30 knots veering west. waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
2 to 4 feet. 

$$

fzus63 kmqt 070301
glfls 
expires:202511070900;;975631

open lake forecast for lake superior
national weather service marquette mi
1001 pm est thu nov 6 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 29.5 inch low over minnesota this evening will move across upper 
michigan tonight to near whitefish bay at 29.3 inches by late friday 
morning. ridging will build over the lake this weekend as the low 
exits into quebec and 30.6 inch high pressure develops over the 
great plains, with the ridge over the lake strengthening from 29.8 
inches on saturday to 30.2 inches through sunday night. the ridge 
quickly breaks down early next week as a 29.4 inch trough sweeps 
across the lake on tuesday.



lsz263-070900-
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-
1001 pm est thu nov 6 2025

...gale warning in effect from 10 am est friday through friday
afternoon...

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

$$