fzus63 kmqt 270300
glfls 
expires:202511270900;;570959

open lake forecast for lake superior
national weather service marquette mi
1000 pm est wed nov 26 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 over the straits of mackinac will shift east into 
ontario tonight and then into quebec on thanksgiving. meanwhile, a 
30.6 inch high over the canadian prairies weakens slightly to 30.5 
inches as it moves into the mississippi river valley through friday, 
with 30.3 inch high pressure persisting over lake superior friday 
through saturday. a 29.7 inch low over the southern plains saturday 
morning will track into lower michigan by sunday morning, resulting 
in 30.0 inch troughing over lake superior. a 30.4 inch high then 
rebuilds over the great lakes on monday.



lsz162-270900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm est wed nov 26 2025 /900 pm cst wed nov 26 2025/

...gale warning in effect until 7 am est /6 am cst/ thursday...

.rest of tonight...northwest gales to 40 knots. a slight chance
of snow. waves 8 to 11 feet occasionally to 14 feet subsiding to
6 to 9 feet occasionally to 11 feet. 
.thursday...northwest gales to 35 knots diminishing to 20 to
30 knots. a chance of snow showers. waves subsiding to 3 to
6 feet occasionally to 8 feet. 
.thursday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots by midnight. a chance of snow showers in the
evening. waves subsiding to 2 to 4 feet. 
.friday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. a slight chance of snow showers in the
morning. waves subsiding to calm to 2 feet. 
.friday night...northwest winds 5 to 15 knots veering north after
midnight. a slight chance of snow showers after midnight. waves
calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. a chance of snow in the morning, then
snow likely in the afternoon. waves calm to 2 feet. 
.saturday night...north winds 10 to 20 knots increasing to 15 to
25 knots after midnight. a chance of snow. waves building to 2 to
4 feet. 
.sunday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.monday...west winds 15 to 25 knots. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 270300
glfls 
expires:202511270900;;570960

open lake forecast for lake superior
national weather service marquette mi
1000 pm est wed nov 26 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 over the straits of mackinac will shift east into 
ontario tonight and then into quebec on thanksgiving. meanwhile, a 
30.6 inch high over the canadian prairies weakens slightly to 30.5 
inches as it moves into the mississippi river valley through friday, 
with 30.3 inch high pressure persisting over lake superior friday 
through saturday. a 29.7 inch low over the southern plains saturday 
morning will track into lower michigan by sunday morning, resulting 
in 30.0 inch troughing over lake superior. a 30.4 inch high then 
rebuilds over the great lakes on monday.



lsz263-270900-
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-
1000 pm est wed nov 26 2025

...gale warning in effect until 10 am est thursday...

.rest of tonight...north gales to 40 knots backing northwest
late. a chance of snow. waves 11 to 15 feet occasionally to
19 feet subsiding to 9 to 12 feet occasionally to 15 feet. 
.thursday...northwest gales to 35 knots diminishing to 20 to
30 knots by mid afternoon. a chance of snow showers. waves
subsiding to 6 to 9 feet occasionally to 11 feet. 
.thursday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots late. a chance of snow showers. waves subsiding 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. a slight chance of snow showers in the
morning. waves subsiding to calm to 2 feet. 
.friday night...northwest winds 5 to 15 knots. a slight chance of
snow showers after midnight. waves calm to 2 feet. 
.saturday...north winds 5 to 15 knots veering northeast in the
afternoon. a chance of snow. waves calm to 2 feet. 
.saturday night...northeast winds 10 to 20 knots becoming north
15 to 25 knots after midnight. snow likely in the evening, then a
chance of snow after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.sunday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. a chance of snow. waves subsiding to 2 to 4 feet. 
.monday...west winds 20 to 30 knots. waves building to 3 to
6 feet occasionally to 8 feet. 

$$