fzus63 kmqt 192101
glfls 
expires:202511200900;;155690

open lake forecast for lake superior
national weather service marquette mi
401 pm est wed nov 19 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 the lake on thursday as a developing 
29.7 inch low over northern manitoba moves into hudson bay. 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.



lsz162-200900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm est wed nov 19 2025 /301 pm cst wed nov 19 2025/

.late this afternoon...southwest winds 10 to 20 knots. a slight
chance of rain showers. waves 1 to 3 feet. 
.tonight...southwest winds 15 to 25 knots. a chance of rain
showers. waves building to 3 to 5 feet occasionally to 7 feet. 
.thursday...southwest winds 15 to 25 knots veering west. a chance
of rain showers. waves subsiding to 2 to 4 feet. 
.thursday night...west winds 15 to 25 knots diminishing to 10 to
20 knots late. waves subsiding to 1 to 3 feet, then building to
2 to 4 feet. 
.friday...northwest winds 10 to 20 knots. 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 10 to 20 knots. 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. waves calm to 2 feet. 
.monday...west winds 10 to 20 knots becoming southeast 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 192101
glfls 
expires:202511200900;;155691

open lake forecast for lake superior
national weather service marquette mi
401 pm est wed nov 19 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 the lake on thursday as a developing 
29.7 inch low over northern manitoba moves into hudson bay. 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.



lsz263-200900-
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 pm est wed nov 19 2025

.late this afternoon...southwest winds 10 to 20 knots. a slight
chance of rain showers. waves 1 to 3 feet. 
.tonight...southwest winds 10 to 20 knots increasing to 15 to
25 knots by midnight. a chance of rain showers. waves building to
3 to 5 feet occasionally to 7 feet. 
.thursday...southwest winds 15 to 25 knots veering west. a chance
of rain showers. waves building to 3 to 6 feet occasionally to
8 feet. 
.thursday night...west winds 10 to 20 knots increasing to 15 to
25 knots by midnight. waves building to 3 to 6 feet occasionally
to 8 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the 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 10 to 20 knots. waves building to
1 to 3 feet. 
.saturday night...southwest winds 10 to 20 knots veering west
after midnight. waves building to 2 to 4 feet. 
.sunday...west winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to 1 to 3 feet. 
.monday...west winds 10 to 20 knots becoming southeast 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$