fzus63 kmqt 240300
glfls 
expires:202511240900;;396931

open lake forecast for lake superior
national weather service marquette mi
1000 pm est sun nov 23 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 30.0 inch ridge was over lake superior this evening as a 30.1 inch 
high was pushing eastward south of the great lakes. this high will 
reach the east coast by monday afternoon with a weak 29.8 inch 
trough moving over lake superior. monday night into tuesday, a 29.8 
inch low will organize just west of the great lakes, deepening to 
29.6 inches tuesday night over the michigan upper peninsula and 
passing over eastern lake superior at 29.4 inches wednesday. this 
low deepens further to 29.3 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.



lsz162-240900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm est sun nov 23 2025 /900 pm cst sun nov 23 2025/

.rest of tonight...south winds 5 to 15 knots becoming southwest
10 to 20 knots by midnight. waves calm to 2 feet building to 1 to
3 feet. 
.monday...west winds 10 to 20 knots diminishing to 5 to 15 knots.
waves building to 2 to 4 feet, then subsiding to calm to 2 feet. 
.monday night...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 calm to 2 feet. 
.tuesday...northeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. a chance of rain showers in the
morning, then rain showers in the afternoon. waves building to
3 to 5 feet occasionally to 7 feet. 
.tuesday night...northeast winds 20 to 30 knots becoming north
gales to 35 knots after midnight. rain showers in the evening.
snow showers. a slight chance of rain showers after midnight.
waves building to 8 to 11 feet occasionally to 14 feet. 
.wednesday...north gales to 40 knots backing northwest in the
afternoon. snow showers. waves subsiding to 6 to 9 feet
occasionally to 11 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 diminishing to 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. 

$$

fzus63 kmqt 240300
glfls 
expires:202511240900;;396932

open lake forecast for lake superior
national weather service marquette mi
1000 pm est sun nov 23 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 30.0 inch ridge was over lake superior this evening as a 30.1 inch 
high was pushing eastward south of the great lakes. this high will 
reach the east coast by monday afternoon with a weak 29.8 inch 
trough moving over lake superior. monday night into tuesday, a 29.8 
inch low will organize just west of the great lakes, deepening to 
29.6 inches tuesday night over the michigan upper peninsula and 
passing over eastern lake superior at 29.4 inches wednesday. this 
low deepens further to 29.3 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.



lsz263-240900-
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 sun nov 23 2025

.rest of tonight...south winds 5 to 15 knots increasing to 10 to
20 knots by midnight, then veering southwest late. waves calm to
2 feet building to 2 to 4 feet. 
.monday...west winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. waves subsiding to calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots. a slight chance of
rain showers after midnight. waves calm to 2 feet. 
.tuesday...northeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. a chance of rain showers in the
morning, then rain showers likely in the afternoon. waves
building to 3 to 5 feet occasionally to 7 feet. 
.tuesday night...northeast winds 20 to 30 knots becoming north
gales to 40 knots after midnight. rain showers in the evening.
snow showers. a slight chance of rain showers after midnight.
waves building to 10 to 14 feet occasionally to 18 feet. 
.wednesday...north gales to 45 knots backing northwest in the
afternoon. snow showers. waves building to 12 to 17 feet
occasionally to 21 feet, then subsiding to 10 to 14 feet
occasionally to 18 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 diminishing to 20 to
30 knots. a chance of snow showers. waves subsiding to 3 to
6 feet occasionally to 8 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$