fzus63 kmqt 052101
glfls 
expires:202512060900;;066768

open lake forecast for lake superior
national weather service marquette mi
400 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 this evening and 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-
400 pm est fri dec 5 2025 /300 pm cst fri dec 5 2025/

.late this afternoon...west winds 15 to 25 knots. waves 1 to
3 feet building to 2 to 4 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. waves 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 052101
glfls 
expires:202512060900;;066769

open lake forecast for lake superior
national weather service marquette mi
400 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 this evening and 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-
400 pm est fri dec 5 2025

.late this afternoon...west winds 15 to 25 knots. a slight chance
of snow showers. waves 2 to 4 feet. 
.tonight...northwest winds 15 to 25 knots. a slight chance of
snow showers in the evening. freezing spray after midnight. waves
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.

$$