fzus63 kmqt 242001
glfls 
expires:202609250800;;994106

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 24 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 30.4 inch high centered over quebec will weaken to 30.3 inches 
over the great lakes basin as a 29.5 inch low develops over the 
northern rockies. on saturday the high begins shifting northeast 
toward northern quebec while the low deepens and moves north through 
the canadian prairies. sunday through monday, the high shifts east 
to the canadian maritimes, weakening to 30.0 inches. this gradually 
weakens high pressure ridging over lake superior from 30.1 inches 
sunday morning to 29.9 inches by the end of monday as a 29.8 inch 
trough approaches from the west. by tuesday evening the trough will 
move over lake superior at 29.7 inches.




lsz162-250800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu sep 24 2026 /301 pm cdt thu sep 24 2026/

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

$$

fzus63 kmqt 242001
glfls 
expires:202609250800;;994107

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 24 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 30.4 inch high centered over quebec will weaken to 30.3 inches 
over the great lakes basin as a 29.5 inch low develops over the 
northern rockies. on saturday the high begins shifting northeast 
toward northern quebec while the low deepens and moves north through 
the canadian prairies. sunday through monday, the high shifts east 
to the canadian maritimes, weakening to 30.0 inches. this gradually 
weakens high pressure ridging over lake superior from 30.1 inches 
sunday morning to 29.9 inches by the end of monday as a 29.8 inch 
trough approaches from the west. by tuesday evening the trough will 
move over lake superior at 29.7 inches.




lsz263-250800-
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 thu sep 24 2026

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...southeast winds 5 to 15 knots veering southwest late.
a slight chance of showers through midnight. waves calm to
2 feet. 
.friday...southwest winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming northeast 5 to 15 knots
late. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots becoming southeast less
than 10 knots late. waves calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.sunday...south winds 5 to 15 knots veering southwest by mid
afternoon. waves calm to 2 feet. 
.sunday night...south winds 5 to 15 knots becoming southwest less
than 10 knots after midnight. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...south winds 10 to 20 knots becoming northwest 15 to
25 knots. showers likely. waves building to 2 to 4 feet. 

$$