fzus63 kmqt 060900
glfls 
expires:202512062100;;093542

open lake forecast for lake superior
national weather service marquette mi
400 am est sat dec 6 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...

this morning, a 29.5 inch trough is over the quebec/ontario line 
draped south from a 29.3 inch low over hudson bay. throughout the 
day, the trough will push fully into quebec while the parent low 
deepens to 29.2 inches. meanwhile, a 30.3 inch high develops over 
saskatchewan. through sunday, this high slides southeast to be over 
minnesota while building to 30.5 inches. monday, the high weakens to 
30.4 inches as it moves over the southern great lakes basin. monday 
afternoon, a 29.7 inch low will develop near north dakota, moving 
over lake superior tuesday morning. a second, stronger clipper low 
will form tuesday over the montana/canada border, absorbing the 
previous low tuesday night at 29.2 inches as it approaches lake 
michigan. the low will weaken slightly to 29.3 inches as it moves 
near the lower great lakes wednesday while 30.1 inch ridging settles 
over the plains. thursday, as the low quickly ejects past the st 
lawrence seaway, high pressure over the canadian rockies builds to 
30.8 inches.



lsz162-062100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est sat dec 6 2025 /300 am cst sat dec 6 2025/

.early this morning...northwest winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet. 
.today...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.tonight...northwest winds 10 to 20 knots veering north by
midnight. waves building to 1 to 3 feet. 
.sunday...north winds 10 to 20 knots backing northwest by late
morning, then diminishing to 5 to 15 knots by mid afternoon.
waves subsiding to calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots backing southwest
after midnight. waves calm to 2 feet. 
.monday...southwest winds 15 to 25 knots. a chance of snow
showers. waves building to 3 to 6 feet occasionally to 8 feet. 
.monday night...southwest winds 15 to 25 knots veering west after
midnight. snow showers. waves subsiding to 1 to 3 feet. 
.tuesday...northwest winds 10 to 20 knots becoming northeast
20 to 30 knots. a chance of snow showers, then snow showers
likely. waves subsiding to calm to 2 feet, then building to 4 to
7 feet occasionally to 9 feet. 
.wednesday...north winds 20 to 30 knots diminishing to 10 to
20 knots. freezing spray. a chance of snow showers. waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 060900
glfls 
expires:202512062100;;093543

open lake forecast for lake superior
national weather service marquette mi
400 am est sat dec 6 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...

this morning, a 29.5 inch trough is over the quebec/ontario line 
draped south from a 29.3 inch low over hudson bay. throughout the 
day, the trough will push fully into quebec while the parent low 
deepens to 29.2 inches. meanwhile, a 30.3 inch high develops over 
saskatchewan. through sunday, this high slides southeast to be over 
minnesota while building to 30.5 inches. monday, the high weakens to 
30.4 inches as it moves over the southern great lakes basin. monday 
afternoon, a 29.7 inch low will develop near north dakota, moving 
over lake superior tuesday morning. a second, stronger clipper low 
will form tuesday over the montana/canada border, absorbing the 
previous low tuesday night at 29.2 inches as it approaches lake 
michigan. the low will weaken slightly to 29.3 inches as it moves 
near the lower great lakes wednesday while 30.1 inch ridging settles 
over the plains. thursday, as the low quickly ejects past the st 
lawrence seaway, high pressure over the canadian rockies builds to 
30.8 inches.



lsz263-062100-
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-
400 am est sat dec 6 2025

.early this morning...northwest winds 20 to 30 knots. freezing
spray. waves 4 to 7 feet occasionally to 9 feet subsiding to 3 to
6 feet occasionally to 8 feet. 
.today...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots increasing to 10 to
20 knots by midnight, then veering north late. a slight chance of
snow showers. waves building to 2 to 4 feet. 
.sunday...north winds 10 to 20 knots backing northwest. waves
subsiding to 1 to 3 feet. 
.sunday night...northwest winds 5 to 15 knots backing southwest
after midnight. waves subsiding to calm to 2 feet. 
.monday...southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. a chance of snow showers. waves
building to 4 to 7 feet occasionally to 9 feet. 
.monday night...southwest winds 20 to 30 knots becoming west
15 to 25 knots after midnight. snow showers. waves subsiding to
3 to 5 feet occasionally to 7 feet. 
.tuesday...northwest winds 10 to 20 knots becoming northeast
20 to 30 knots. a chance of snow showers. waves subsiding to calm
to 2 feet, then building to 6 to 9 feet occasionally to 11 feet. 
.wednesday...north winds 20 to 30 knots diminishing to 15 to
25 knots. freezing spray. a chance of snow showers. waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$