fzus63 kmqt 071506 cca
glfls 
expires:202512072100;;166873

open lake forecast for lake superior...corrected
national weather service marquette mi
1006 am 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 by this afternoon 
slides over the great lakes basin tonight into monday. by monday 
afternoon, a 29.8 inch low develops over north dakota, eventually 
moving over lake superior tuesday morning as it deepens to 29.6 
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 
thursday as high pressure over the canadian rockies builds to 30.9 
inches.



lsz162-072100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1006 am est sun dec 7 2025 /906 am cst sun dec 7 2025/

.rest of today...northwest winds 10 to 20 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots backing southwest late.
a slight chance of snow showers after midnight. waves calm to
2 feet. 
.monday...southwest 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. 
.monday night...southwest winds 15 to 25 knots veering west after
midnight. snow showers in the evening, then a chance of snow
showers after midnight. waves subsiding to 2 to 4 feet. 
.tuesday...northwest winds 5 to 15 knots veering northeast in the
afternoon. a chance of snow showers. waves subsiding to calm to
2 feet. 
.tuesday night...east winds 20 to 30 knots backing northeast
after midnight. snow showers likely 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 diminishing to 10 to
20 knots. a chance of snow showers. waves building to 6 to 9 feet
occasionally to 11 feet, then 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 2 to
4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 071506 cca
glfls 
expires:202512072100;;166874

open lake forecast for lake superior...corrected
national weather service marquette mi
1006 am 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 by this afternoon 
slides over the great lakes basin tonight into monday. by monday 
afternoon, a 29.8 inch low develops over north dakota, eventually 
moving over lake superior tuesday morning as it deepens to 29.6 
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 
thursday as high pressure over the canadian rockies builds to 30.9 
inches.



lsz263-072100-
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-
1006 am est sun dec 7 2025

.rest of today...northwest winds 10 to 20 knots. a slight chance
of snow showers late in the morning. waves 3 to 5 feet
occasionally to 7 feet subsiding to 1 to 3 feet. 
.tonight...northwest winds 5 to 15 knots backing southwest late.
a slight chance of snow showers after midnight. waves subsiding
to calm to 2 feet. 
.monday...southwest winds 10 to 20 knots increasing to 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. snow showers.
waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday...northwest winds 10 to 20 knots becoming north 5 to
15 knots in the afternoon. a chance of snow showers. waves
subsiding to calm to 2 feet. 
.tuesday night...east winds 20 to 30 knots becoming northeast
gales to 35 knots after midnight. a chance of snow showers.
freezing spray after midnight. waves building to 7 to 10 feet
occasionally to 13 feet. 
.wednesday...north gales to 35 knots diminishing to 15 to
25 knots. freezing spray. a chance of snow showers. waves
subsiding to 1 to 3 feet. 
.thursday...north winds 10 to 20 knots increasing to 20 to
30 knots. a chance of snow showers. waves building to 3 to 6 feet
occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$