fzus63 kmqt 310901
glfls 
expires:202512312100;;541393

open lake forecast for lake superior
national weather service marquette mi
401 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 low strengthens to 29.3 inches while retrograding toward hudson 
bay today, a 30.7 inch ridge will build from the canadian prairies 
into the upper mississippi valley. the ridge will weaken to 30.2 
inches through thursday, but the pattern will remain persistent 
into friday.



lsz162-312100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am est wed dec 31 2025 /301 am cst wed dec 31 2025/

.early this morning...northwest winds 15 to 25 knots. a slight
chance of snow showers. waves 1 to 3 feet. 
.today...northwest winds 15 to 25 knots increasing to 20 to
30 knots. a slight chance of snow showers in the morning. waves
building to 3 to 5 feet occasionally to 7 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet. 
.thursday...west winds 15 to 25 knots. a slight chance of snow
showers. waves 2 to 4 feet. 
.thursday night...west winds 15 to 25 knots. a slight chance of
snow showers in the evening. waves 2 to 4 feet. 
.friday...west winds 15 to 25 knots. waves 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 310901
glfls 
expires:202512312100;;541394

open lake forecast for lake superior
national weather service marquette mi
401 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 low strengthens to 29.3 inches while retrograding toward hudson 
bay today, a 30.7 inch ridge will build from the canadian prairies 
into the upper mississippi valley. the ridge will weaken to 30.2 
inches through thursday, but the pattern will remain persistent 
into friday.



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-
401 am est wed dec 31 2025

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

.early this morning...northwest winds 15 to 25 knots. freezing
spray. a chance of snow showers. waves 3 to 5 feet occasionally
to 7 feet. 
.today...northwest winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible by mid
afternoon. a chance of snow showers in the morning. heavy
freezing spray. waves building to 5 to 8 feet occasionally to
10 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 5 to 8 feet
occasionally to 10 feet. 
.thursday night...west winds 20 to 30 knots veering northwest
after midnight. freezing spray. a chance of snow showers. waves
subsiding to 4 to 7 feet occasionally to 9 feet. 
.friday...northwest winds 20 to 30 knots backing west in the
afternoon. freezing spray. waves 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.

$$