fzus63 kmqt 201501
glfls 
expires:202511202100;;199432

open lake forecast for lake superior
national weather service marquette mi
1001 am est thu nov 20 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 29.8 inch trough moves over lake superior today as a developing 
29.7 inch low over northern manitoba moves into hudson bay at 29.5 
inches tonight. a 30.1 inch ridge of high pressure over the northern 
plains and upper midwest on friday moves over the great lakes on 
saturday. another 29.8 inch trough then moves over lake superior 
saturday night into sunday before 30.1 inch high pressure rebuilds 
over the great lakes early next week.



lsz162-202100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am est thu nov 20 2025 /901 am cst thu nov 20 2025/

.rest of today...southwest winds 15 to 25 knots veering west. a
chance of rain showers late in the morning. waves 3 to 5 feet
occasionally to 7 feet subsiding to 2 to 4 feet. 
.tonight...west winds 15 to 25 knots diminishing to 10 to
20 knots late. waves subsiding to 1 to 3 feet, then building to
3 to 5 feet occasionally to 7 feet. 
.friday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.friday night...northwest winds 5 to 15 knots backing southwest
after midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. a slight chance of rain showers in the
afternoon. waves calm to 2 feet. 
.saturday night...west winds 10 to 20 knots. waves calm to
2 feet. 
.sunday...west winds 10 to 20 knots diminishing to 5 to 15 knots.
waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots backing south. waves calm
to 2 feet. 

$$

fzus63 kmqt 201501
glfls 
expires:202511202100;;199433

open lake forecast for lake superior
national weather service marquette mi
1001 am est thu nov 20 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 29.8 inch trough moves over lake superior today as a developing 
29.7 inch low over northern manitoba moves into hudson bay at 29.5 
inches tonight. a 30.1 inch ridge of high pressure over the northern 
plains and upper midwest on friday moves over the great lakes on 
saturday. another 29.8 inch trough then moves over lake superior 
saturday night into sunday before 30.1 inch high pressure rebuilds 
over the great lakes early next week.



lsz263-202100-
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 am est thu nov 20 2025

.rest of today...southwest winds 15 to 25 knots veering west. a
chance of rain showers. waves 3 to 6 feet occasionally to 8 feet.
.tonight...west winds 10 to 20 knots increasing to 15 to 25 knots
by midnight. waves subsiding to 3 to 5 feet occasionally to
7 feet, then building to 4 to 7 feet occasionally to 9 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.friday night...northwest winds 5 to 15 knots becoming west less
than 10 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...south winds 10 to 20 knots veering southwest in the
afternoon. a slight chance of rain showers in the afternoon.
waves building to 1 to 3 feet. 
.saturday night...west winds 10 to 20 knots. waves building to
2 to 4 feet. 
.sunday...west winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.monday...southwest winds 5 to 15 knots backing south. waves calm
to 2 feet. 

$$