fzus63 kmqt 311501
glfls 
expires:202512312100;;555524

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed dec 31 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...

as a 28.2 inch low retrogrades into hudson bay today, a 30.7 inch 
ridge builds from the canadian prairies into the upper mississippi 
valley. the ridge weakens to 30.2 inches through thursday, but the 
pattern remains persistent into friday. weak ridging of 30.0 inches 
eventually pushes into lake superior by saturday, before a parent 
high of 30.3 inches moves into the upper great lakes by sunday.



lsz162-312100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est wed dec 31 2025 /900 am cst wed dec 31 2025/

.rest of today...north winds 20 to 30 knots backing northwest.
waves 3 to 5 feet occasionally to 7 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. waves 3 to 5 feet occasionally to 7 feet. 
.thursday...west winds 15 to 25 knots. a slight chance of snow
showers. waves subsiding to 2 to 4 feet. 
.thursday night...west winds 15 to 25 knots. a slight chance of
snow showers in the evening. waves subsiding to 1 to 3 feet. 
.friday...west winds 15 to 25 knots. waves building to 2 to
4 feet. 
.friday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.sunday...west winds 5 to 15 knots. a chance of snow showers.
waves calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 311501
glfls 
expires:202512312100;;555525

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed dec 31 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...

as a 28.2 inch low retrogrades into hudson bay today, a 30.7 inch 
ridge builds from the canadian prairies into the upper mississippi 
valley. the ridge weakens to 30.2 inches through thursday, but the 
pattern remains persistent into friday. weak ridging of 30.0 inches 
eventually pushes into lake superior by saturday, before a parent 
high of 30.3 inches moves into the upper great lakes by sunday.



lsz263-312100-
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 31 2025

...heavy freezing spray warning in effect through thursday
evening...

.rest of today...north winds 20 to 30 knots backing northwest by
late morning, then increasing to 30 knots with a few gale force
gusts to 35 knots possible by mid afternoon. a chance of snow
showers late in the morning. heavy freezing spray. waves 4 to
8 feet occasionally to 10 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.tonight...northwest winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 20 to 30 knots by
midnight. heavy freezing spray. waves subsiding to 4 to 8 feet
occasionally to 10 feet. 
.thursday...northwest winds 20 to 30 knots backing west. heavy
freezing spray. a chance of snow showers. waves subsiding to 4 to
7 feet occasionally to 9 feet. 
.thursday night...west winds 20 to 30 knots veering northwest
after midnight. freezing spray. a chance of snow showers. waves
4 to 7 feet occasionally to 9 feet. 
.friday...northwest winds 20 to 30 knots backing west in the
afternoon. freezing spray. waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 4 to 7 feet occasionally
to 9 feet. 
.friday night...northwest winds 20 to 30 knots diminishing to
10 to 20 knots after midnight. freezing spray in the evening.
waves subsiding to 2 to 4 feet. 
.saturday...northwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots backing west. a chance of
snow showers. waves calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$