fzus63 kmqt 101501
glfls 
expires:202512102100;;338724

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed dec 10 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...

29.5 to 29.6 troughing over lake superior this morning gradually 
weakens to 29.7 inches through this evening as a 29.2 inch low 
currently over southern lower michigan tracks to southern quebec at 
29.1 inches by tonight. this will allow 30.2 inch high pressure to 
rebuild over the northern plains later today through thursday while 
extending weak ridging over lake superior. ridging breaks down 
slightly on friday as a 29.8 inch trough drops out of northern 
ontario, but ridging quickly rebuilds this weekend as 30.6 inch high 
pressure over the northern plains extends back into the great lakes.



lsz162-102100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est wed dec 10 2025 /900 am cst wed dec 10 2025/

.rest of today...north winds 15 to 25 knots backing northwest by
mid afternoon. waves 4 to 7 feet occasionally to 9 feet subsiding
to 2 to 4 feet. 
.tonight...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by midnight. waves subsiding to calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots backing west. waves
calm to 2 feet. 
.thursday night...west winds 5 to 15 knots. a slight chance of
snow showers after midnight. waves calm to 2 feet. 
.friday...west winds 10 to 20 knots increasing to 20 to 30 knots
in the afternoon. snow showers likely in the morning, then a
chance of snow showers in the afternoon. waves building to 3 to
5 feet occasionally to 7 feet. 
.friday night...northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.saturday...northwest winds 20 to 30 knots. waves subsiding to
1 to 3 feet. 
.sunday...northwest winds 15 to 25 knots backing southwest. a
chance of snow showers. waves subsiding to calm to 2 feet, then
building to 3 to 5 feet occasionally to 7 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 101501
glfls 
expires:202512102100;;338725

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed dec 10 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...

29.5 to 29.6 troughing over lake superior this morning gradually 
weakens to 29.7 inches through this evening as a 29.2 inch low 
currently over southern lower michigan tracks to southern quebec at 
29.1 inches by tonight. this will allow 30.2 inch high pressure to 
rebuild over the northern plains later today through thursday while 
extending weak ridging over lake superior. ridging breaks down 
slightly on friday as a 29.8 inch trough drops out of northern 
ontario, but ridging quickly rebuilds this weekend as 30.6 inch high 
pressure over the northern plains extends back into the great lakes.



lsz263-102100-
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 am est wed dec 10 2025

...gale warning in effect until 11 am est this morning...

.rest of today...north winds 20 to 30 knots becoming northwest
15 to 25 knots by mid afternoon. freezing spray. waves 7 to
10 feet occasionally to 13 feet subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tonight...northwest winds 15 to 25 knots becoming north 10 to
20 knots late. waves subsiding to 2 to 4 feet. 
.thursday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves subsiding to calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots backing west
after midnight. a slight chance of snow showers after midnight.
waves calm to 2 feet. 
.friday...west winds 10 to 20 knots increasing to 20 to 30 knots
in the afternoon. a chance of snow showers in the morning, then
snow showers likely in the afternoon. waves building to 4 to
7 feet occasionally to 9 feet. 
.friday night...northwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. heavy freezing spray. a chance
of snow showers. waves building to 6 to 9 feet occasionally to
11 feet. 
.saturday...northwest winds 20 to 30 knots. heavy freezing spray.
waves subsiding to 4 to 7 feet occasionally to 9 feet. 
.sunday...northwest winds 15 to 25 knots becoming southwest 20 to
30 knots. a chance of snow showers. waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$