fzus63 kmqt 060901
glfls 
expires:202511062100;;935097

open lake forecast for lake superior
national weather service marquette mi
401 am 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...

30.2 inch ridging over the lake this morning breaks down into the 
afternoon as a  29.6 inch low moves from the northern plains into 
mn. this deepens to 29.3 inches as it moves over lake superior on 
friday morning. as the low pushes into central quebec saturday, weak 
29.9 inch ridging will be over the lake. saturday night into sunday, 
a low of 29.7 inches will quickly pass south of lake michigan 
towards the lower great lakes while high pressure of at least 30.6 
inches builds over the northern plains. the low will lift north into 
quebec on monday, with lake superior remaining between the 29.4 inch 
low and 30.6 inch high that will by then be centered over the 
southern plains. the ridge quickly breaks down into tuesday as a 
29.5 inch trough sweeps across the lake.



lsz162-062100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am est thu nov 6 2025 /301 am cst thu nov 6 2025/

.early this morning...west winds 5 to 15 knots. waves calm to
2 feet. 
.today...southwest winds 5 to 15 knots becoming south 10 to
20 knots by late morning, then backing southeast by mid
afternoon. a slight chance of rain showers. waves calm to 2 feet.
.tonight...southeast winds 15 to 25 knots becoming south 10 to
20 knots by midnight, then veering west late. a chance of rain
showers. waves 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. a slight chance of snow
showers in the afternoon. 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 after 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. 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, then
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 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 060901
glfls 
expires:202511062100;;935098

open lake forecast for lake superior
national weather service marquette mi
401 am 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...

30.2 inch ridging over the lake this morning breaks down into the 
afternoon as a  29.6 inch low moves from the northern plains into 
mn. this deepens to 29.3 inches as it moves over lake superior on 
friday morning. as the low pushes into central quebec saturday, weak 
29.9 inch ridging will be over the lake. saturday night into sunday, 
a low of 29.7 inches will quickly pass south of lake michigan 
towards the lower great lakes while high pressure of at least 30.6 
inches builds over the northern plains. the low will lift north into 
quebec on monday, with lake superior remaining between the 29.4 inch 
low and 30.6 inch high that will by then be centered over the 
southern plains. the ridge quickly breaks down into tuesday as a 
29.5 inch trough sweeps across the lake.



lsz263-062100-
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 thu nov 6 2025

...gale watch in effect from friday morning through friday
afternoon...

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

$$