fzus63 kmqt 090801
glfls 
expires:202605092000;;261426

open lake forecast for lake superior
national weather service marquette mi
401 am 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 29.5 inch low over lake superior this morning pushes east into 
ontario before arriving over western 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 
on wednesday.



lsz162-092000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt sat may 9 2026 /301 am cdt sat may 9 2026/

.early this morning...northwest winds 10 to 20 knots. waves calm
to 2 feet. 
.today...northwest winds 10 to 20 knots backing west in the
afternoon. waves calm to 2 feet. 
.tonight...northwest winds 10 to 20 knots. waves calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots becoming west 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.monday...north winds less than 10 knots becoming south 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots. a chance of rain
showers after midnight. waves calm to 2 feet. 
.tuesday...east winds 10 to 20 knots backing north. rain showers.
waves building to 2 to 4 feet, then subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering north. waves calm
to 2 feet. 

$$

fzus63 kmqt 090801
glfls 
expires:202605092000;;261427

open lake forecast for lake superior
national weather service marquette mi
401 am 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 29.5 inch low over lake superior this morning pushes east into 
ontario before arriving over western 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 
on wednesday.



lsz263-092000-
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 am edt sat may 9 2026

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...northwest winds 5 to 15 knots backing west late. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.tonight...west winds 5 to 15 knots veering northwest after
midnight. waves subsiding to calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots backing west in the
afternoon. waves calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.monday...northwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots. waves building to
1 to 3 feet. 
.tuesday...southeast winds 10 to 20 knots backing north. rain
showers likely. waves building to 2 to 4 feet, then subsiding to
1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots backing west. waves
subsiding to calm to 2 feet. 

$$