fzus63 kmqt 070901
glfls 
expires:202511072100;;989539

open lake forecast for lake superior
national weather service marquette mi
401 am est fri nov 7 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 29.4 inch low overtop lake superior this morning continues its 
eastward track today, deepening to 29.3 inches before reaching the 
southern ontario/quebec border tonight. 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.



lsz162-072100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am est fri nov 7 2025 /301 am cst fri nov 7 2025/

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

$$

fzus63 kmqt 070901
glfls 
expires:202511072100;;989540

open lake forecast for lake superior
national weather service marquette mi
401 am est fri nov 7 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 29.4 inch low overtop lake superior this morning continues its 
eastward track today, deepening to 29.3 inches before reaching the 
southern ontario/quebec border tonight. 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.



lsz263-072100-
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-
401 am est fri nov 7 2025

...gale warning in effect from 10 am this morning to 4 pm est
this afternoon...

.early this morning...north winds 10 to 20 knots. a chance of
rain showers. waves calm to 2 feet. 
.today...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. 
.tonight...north winds 15 to 25 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 by mid afternoon. a slight chance of snow showers. waves
calm to 2 feet. 
.saturday night...north winds 15 to 25 knots backing northwest
after midnight. a chance of snow showers. waves building to 3 to
6 feet occasionally to 8 feet. 
.sunday...north 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 6 feet occasionally to 8 feet. 
.sunday night...north gales to 35 knots diminishing to 20 to
30 knots after midnight. a chance of snow showers. waves building
to 4 to 7 feet occasionally to 9 feet. 
.monday...northwest winds 20 to 30 knots becoming southwest 15 to
25 knots. waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet. 
.tuesday...southwest winds 20 to 30 knots veering west. a chance
of snow showers. a chance of rain showers. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 

$$