fzus63 kmqt 060300
glfls 
expires:202512060900;;079817

open lake forecast for lake superior
national weather service marquette mi
1000 pm est fri dec 5 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 29.6 inch trough passes over the lake tonight, extending from a 
deepening 29.4 inch low over hudson bay. as the trough shifts east 
saturday, a 30.4 inch high builds over the northern plains and 
canadian prairies, shifting east towards the great lakes late this 
weekend and arriving monday. the next clipper low arrives over lake 
superior at around 29.7 inches monday night before leaving tuesday 
afternoon. a stronger clipper low at around 29.3 inches digs through 
the northern plains tuesday before moving through the great lakes 
region on wednesday.



lsz162-060900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm est fri dec 5 2025 /900 pm cst fri dec 5 2025/

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

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 060300
glfls 
expires:202512060900;;079818

open lake forecast for lake superior
national weather service marquette mi
1000 pm est fri dec 5 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 29.6 inch trough passes over the lake tonight, extending from a 
deepening 29.4 inch low over hudson bay. as the trough shifts east 
saturday, a 30.4 inch high builds over the northern plains and 
canadian prairies, shifting east towards the great lakes late this 
weekend and arriving monday. the next clipper low arrives over lake 
superior at around 29.7 inches monday night before leaving tuesday 
afternoon. a stronger clipper low at around 29.3 inches digs through 
the northern plains tuesday before moving through the great lakes 
region on wednesday.



lsz263-060900-
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-
1000 pm est fri dec 5 2025

.rest of tonight...northwest winds 15 to 25 knots. a slight
chance of snow showers late in the evening. freezing spray after
midnight. waves 3 to 5 feet occasionally to 7 feet building to
4 to 7 feet occasionally to 9 feet. 
.saturday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. freezing spray in the morning. waves subsiding to calm
to 2 feet. 
.saturday night...northwest winds 5 to 15 knots increasing to
10 to 20 knots by midnight, then veering north late. waves
building to 1 to 3 feet. 
.sunday...north winds 10 to 20 knots backing northwest in the
afternoon. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 
.sunday night...northwest winds 5 to 15 knots backing west 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 becoming west
10 to 20 knots after midnight. snow showers likely in the
evening, then a chance of snow showers after midnight. waves
subsiding to 2 to 4 feet. 
.tuesday...west winds 10 to 20 knots becoming east 20 to
30 knots. a chance of snow showers, then snow showers likely.
waves subsiding to calm to 2 feet, then building to 5 to 8 feet
occasionally to 10 feet. 
.wednesday...north gales to 35 knots diminishing to 20 to
30 knots. freezing spray. a chance of snow showers. waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$