fzus63 kmqt 092002
glfls 
expires:202605100800;;288528

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat may 9 2026

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 29.4 inch low east of lake superior makes it to quebec this 
evening. behind the low, ridging progressively builds over the lake 
as a 30.2 inch high pressure over the canadian prairies builds 
towards the great lakes this weekend. the high shifts southeast into 
the western great lakes at 30.3 inches sunday night into monday. 
ridging from the high persists at around 30.2 inches over lake 
superior through monday evening. the ridging is eventually replaced 
by a 29.7 inch clipper descending over western lake superior on 
tuesday as the previous high pressure weakens and shifts to the east 
coast. as the clipper continues towards the eastern great lakes 
tuesday night into wednesday, 30.1 inch high pressure ridging moves 
over lake superior. this high pressure is pressed southeast to the 
lower great lakes on thursday while a 29.4 inch low emanates off the 
northern rockies.



lsz162-100800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sat may 9 2026 /301 pm cdt sat may 9 2026/

.late this afternoon...northwest winds 15 to 25 knots. waves calm
to 2 feet. 
.tonight...northwest winds 10 to 20 knots. waves calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing west late. waves calm to
2 feet. 
.sunday night...west winds 5 to 15 knots veering north after
midnight, then diminishing to less than 10 knots late. waves calm
to 2 feet. 
.monday...southeast winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. a chance of rain showers after midnight.
waves calm to 2 feet. 
.tuesday...southeast winds 10 to 20 knots backing north by mid
afternoon. rain showers. waves building to 2 to 4 feet. 
.tuesday night...north winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 10 to 20 knots becoming southwest 5 to
15 knots. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots becoming south 10 to
20 knots. a chance of rain showers. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 092002
glfls 
expires:202605100800;;288529

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat may 9 2026

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 29.4 inch low east of lake superior makes it to quebec this 
evening. behind the low, ridging progressively builds over the lake 
as a 30.2 inch high pressure over the canadian prairies builds 
towards the great lakes this weekend. the high shifts southeast into 
the western great lakes at 30.3 inches sunday night into monday. 
ridging from the high persists at around 30.2 inches over lake 
superior through monday evening. the ridging is eventually replaced 
by a 29.7 inch clipper descending over western lake superior on 
tuesday as the previous high pressure weakens and shifts to the east 
coast. as the clipper continues towards the eastern great lakes 
tuesday night into wednesday, 30.1 inch high pressure ridging moves 
over lake superior. this high pressure is pressed southeast to the 
lower great lakes on thursday while a 29.4 inch low emanates off the 
northern rockies.



lsz263-100800-
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-
401 pm edt sat may 9 2026

.late this afternoon...west winds 10 to 20 knots. waves 1 to
3 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves 1 to 3 feet. 
.sunday...northwest winds 5 to 15 knots backing west in the
afternoon. waves subsiding to calm to 2 feet. 
.sunday night...west winds 5 to 15 knots veering north after
midnight, then diminishing to less than 10 knots late. waves calm
to 2 feet. 
.monday...south winds 5 to 15 knots. waves calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots. a chance of rain
showers after midnight. waves building to 1 to 3 feet. 
.tuesday...southeast winds 10 to 20 knots. rain showers. waves
building to 2 to 4 feet. 
.tuesday night...north winds 10 to 20 knots. waves subsiding to
1 to 3 feet. 
.wednesday...northwest winds 10 to 20 knots becoming west 5 to
15 knots. waves subsiding to calm to 2 feet. 
.thursday...south winds 5 to 15 knots increasing to 10 to
20 knots. a chance of rain showers. waves building to 1 to
3 feet. 

$$