fzus63 kmqt 070901
glfls 
expires:202512072100;;151784

open lake forecast for lake superior
national weather service marquette mi
400 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 30.4 inch high centered over manitoba early this morning extends 
ridging southward into the northern plains this morning, becoming 
centered over minnesota by this afternoon. the high slides over the 
great lakes basin 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 30.0 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-
400 am est sun dec 7 2025 /300 am cst sun dec 7 2025/

.early this morning...northwest winds 10 to 20 knots. waves 2 to
4 feet. 
.today...northwest winds 10 to 20 knots. waves 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 1 to 3 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 3 to 6 feet occasionally to 8 feet. 
.wednesday...north winds 20 to 30 knots diminishing to 10 to
20 knots. a chance of snow showers. waves building to 4 to 7 feet
occasionally to 9 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 1 to
3 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 070901
glfls 
expires:202512072100;;151785

open lake forecast for lake superior
national weather service marquette mi
400 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 30.4 inch high centered over manitoba early this morning extends 
ridging southward into the northern plains this morning, becoming 
centered over minnesota by this afternoon. the high slides over the 
great lakes basin 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 30.0 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-
400 am est sun dec 7 2025

.early this morning...northwest winds 10 to 20 knots. a slight
chance of snow showers. waves 2 to 4 feet. 
.today...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. a slight chance of snow showers in the morning. waves
building to 3 to 5 feet occasionally to 7 feet, then 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 5 to 8 feet
occasionally to 10 feet. 
.wednesday...north gales to 35 knots diminishing to 15 to
25 knots. freezing spray. a chance of snow showers. waves
subsiding to 2 to 4 feet. 
.thursday...north winds 10 to 20 knots increasing to 20 to
30 knots. a chance of snow showers. waves subsiding to 1 to
3 feet, then building to 3 to 5 feet occasionally to 7 feet. 

note, wave height forecasts are for ice free areas.

$$