fzus63 kmqt 072101
glfls 
expires:202512080900;;181382

open lake forecast for lake superior
national weather service marquette mi
400 pm est sun dec 7 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 30.5 inch high becoming centered over minnesota this afternoon 
slides over the great lakes basin tonight into monday as it weakens 
to 30.4 inches. by monday afternoon, a 29.7 inch low develops over 
north dakota, eventually moving over lake superior tuesday morning 
as it deepens to 29.5 inches. a second, stronger clipper low forms 
tuesday over the montana/canada border, absorbing the previous low 
tuesday night at 29.2 inches as it approaches lake michigan. the low 
lifts through southern ontario on wednesday while weak 30.1 inch 
ridging traverses the plains. the low quickly ejects past the st. 
lawrence seaway on thursday as high pressure over the canadian 
rockies builds to 30.9 inches, eventually dropping into the northern 
plains on friday.



lsz162-080900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est sun dec 7 2025 /300 pm cst sun dec 7 2025/

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

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 072101
glfls 
expires:202512080900;;181383

open lake forecast for lake superior
national weather service marquette mi
400 pm est sun dec 7 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 30.5 inch high becoming centered over minnesota this afternoon 
slides over the great lakes basin tonight into monday as it weakens 
to 30.4 inches. by monday afternoon, a 29.7 inch low develops over 
north dakota, eventually moving over lake superior tuesday morning 
as it deepens to 29.5 inches. a second, stronger clipper low forms 
tuesday over the montana/canada border, absorbing the previous low 
tuesday night at 29.2 inches as it approaches lake michigan. the low 
lifts through southern ontario on wednesday while weak 30.1 inch 
ridging traverses the plains. the low quickly ejects past the st. 
lawrence seaway on thursday as high pressure over the canadian 
rockies builds to 30.9 inches, eventually dropping into the northern 
plains on friday.



lsz263-080900-
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 pm est sun dec 7 2025

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

note, wave height forecasts are for ice free areas.

$$