fzus63 kmqt 062101
glfls 
expires:202512070900;;123275

open lake forecast for lake superior
national weather service marquette mi
400 pm 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...

a 30.3 inch high over saskatchewan today progressively builds into 
the northern plains this evening to sunday, eventually strengthening 
to 30.4 inches over minnesota by sunday. the high continues into 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.



lsz162-070900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est sat dec 6 2025 /300 pm cst sat dec 6 2025/

.late this afternoon...northwest winds 10 to 20 knots. waves calm
to 2 feet. 
.tonight...northwest winds 10 to 20 knots increasing to 15 to
25 knots by midnight, then diminishing to 10 to 20 knots late.
isolated snow showers. waves building to 2 to 4 feet. 
.sunday...north winds 10 to 20 knots backing northwest. isolated
snow showers in the morning. waves subsiding to calm to 2 feet. 
.sunday night...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 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 5 to 15 knots veering east 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. waves
building to 3 to 6 feet occasionally to 8 feet. 
.wednesday...north winds 15 to 25 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...north winds 10 to 20 knots becoming northwest 15 to
25 knots. waves building to 1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 062101
glfls 
expires:202512070900;;123276

open lake forecast for lake superior
national weather service marquette mi
400 pm 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...

a 30.3 inch high over saskatchewan today progressively builds into 
the northern plains this evening to sunday, eventually strengthening 
to 30.4 inches over minnesota by sunday. the high continues into 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.



lsz263-070900-
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 sat dec 6 2025

.late this afternoon...northwest winds 5 to 15 knots. isolated
snow showers. waves 1 to 3 feet. 
.tonight...northwest winds 10 to 20 knots. scattered snow
showers. waves building to 2 to 4 feet. 
.sunday...north winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then backing northwest by mid
afternoon. isolated snow showers. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet. 
.sunday night...northwest winds 5 to 15 knots backing southwest
late. a slight chance of snow showers. waves subsiding to calm to
2 feet. 
.monday...southwest winds 15 to 25 knots. a chance of snow
showers in the afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.monday night...southwest winds 20 to 30 knots diminishing to
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 north 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. a chance of snow showers. freezing
spray after midnight. waves building to 5 to 8 feet occasionally
to 10 feet. 
.wednesday...north winds 20 to 30 knots diminishing to 15 to
25 knots. a chance of snow showers. waves subsiding to 2 to
4 feet. 
.thursday...north winds 10 to 20 knots increasing to 15 to
25 knots. 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.

$$