fzus63 kmqt 242101
glfls 
expires:202511250900;;441043

open lake forecast for lake superior
national weather service marquette mi
400 pm est mon nov 24 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 29.8 inch trough was over lake superior late this afternoon. 
tonight into tuesday, a 29.8 inch low will organize just west of the 
great lakes, deepening to 29.6 inches tuesday night over the upper 
peninsula and passing over eastern lake superior at 29.3 inches 
wednesday. this low deepens further to 29.2 inches over quebec 
thursday while 30.5 inch high pressure builds over the northern 
great plains. this high moves over lake superior friday into the 
weekend.



lsz162-250900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est mon nov 24 2025 /300 pm cst mon nov 24 2025/

...gale watch in effect from tuesday evening through thursday
morning...

.late this afternoon...west winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...north winds 5 to 15 knots becoming northeast 10 to
20 knots by midnight, then increasing to 15 to 25 knots late. a
slight chance of rain showers after midnight. waves building to
2 to 4 feet. 
.tuesday...northeast winds 15 to 25 knots increasing to 20 to
30 knots. a chance of rain showers in the morning, then rain
showers likely with pockets of snow showers in the afternoon.
waves building to 5 to 8 feet occasionally to 10 feet. 
.tuesday night...northeast gales to 35 knots becoming north gales
to 40 knots by midnight. a slight chance of rain showers in the
evening. snow showers. waves building to 9 to 12 feet
occasionally to 15 feet. 
.wednesday...north gales to 40 knots backing northwest in the
afternoon. snow showers. waves subsiding to 7 to 10 feet
occasionally to 13 feet. 
.wednesday night...northwest gales to 35 knots diminishing to
20 to 30 knots after midnight. a chance of snow showers. waves
subsiding to 4 to 7 feet occasionally to 9 feet. 
.thursday...northwest winds 20 to 30 knots. waves subsiding to
3 to 5 feet occasionally to 7 feet. 
.thursday night...northwest winds 15 to 25 knots. waves subsiding
to 1 to 3 feet. 
.friday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 242101
glfls 
expires:202511250900;;441044

open lake forecast for lake superior
national weather service marquette mi
400 pm est mon nov 24 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 29.8 inch trough was over lake superior late this afternoon. 
tonight into tuesday, a 29.8 inch low will organize just west of the 
great lakes, deepening to 29.6 inches tuesday night over the upper 
peninsula and passing over eastern lake superior at 29.3 inches 
wednesday. this low deepens further to 29.2 inches over quebec 
thursday while 30.5 inch high pressure builds over the northern 
great plains. this high moves over lake superior friday into the 
weekend.



lsz263-250900-
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 mon nov 24 2025

...gale watch in effect from tuesday evening through thursday
morning...

.late this afternoon...northwest winds 5 to 15 knots. waves 1 to
3 feet. 
.tonight...north winds 5 to 15 knots veering northeast by
midnight, then increasing to 10 to 20 knots late. a slight chance
of rain showers after midnight. waves subsiding to calm to
2 feet, then building to 2 to 4 feet. 
.tuesday...northeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. a chance of rain showers in the
morning, then rain showers likely with pockets of snow showers in
the afternoon. waves building to 5 to 8 feet occasionally to
10 feet. 
.tuesday night...northeast gales to 40 knots backing north late.
rain showers in the evening. snow showers. a slight chance of
rain showers after midnight. waves building to 11 to 15 feet
occasionally to 19 feet. 
.wednesday...north gales to 45 knots. snow showers. waves
building to 12 to 17 feet occasionally to 21 feet, then subsiding
to 11 to 15 feet occasionally to 19 feet. 
.wednesday night...northwest gales to 40 knots. snow showers
likely in the evening, then a chance of snow showers after
midnight. waves subsiding to 8 to 11 feet occasionally to
14 feet. 
.thursday...northwest gales to 40 knots. a chance of snow
showers. waves subsiding to 5 to 8 feet occasionally to 10 feet. 
.thursday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. a chance of snow showers. waves
subsiding to 3 to 5 feet occasionally to 7 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$