fzus63 kmqt 240756
glfls 
expires:202608242000;;269381

open lake forecast for lake superior
national weather service marquette mi
356 am edt mon aug 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 30.1 inch high pressure moves through the western great lakes 
today before moving into the ohio river valley by tonight.
meanwhile, 29.7 inch clipper low pressure over saskatchewan this 
morning moves over lake winnipeg on tuesday. this clipper moves over 
lake superior tuesday night before lifting away towards james bay 
and northern quebec wednesday night into thursday morning. 30.0 inch 
high pressure ridging returns to lake superior by thursday 
afternoon, increasing to 30.2 inches thursday night into friday as 
the high's center moves overhead. 




lsz162-242000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
356 am edt mon aug 24 2026 /256 am cdt mon aug 24 2026/

.early this morning...north winds less than 10 knots. waves calm
to 2 feet. 
.today...north winds less than 10 knots becoming south 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots becoming northeast less than
10 knots after midnight, then veering east late. patchy fog after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet. 
.tuesday...east winds 5 to 15 knots veering south in the
afternoon, then backing east late. a chance of showers and
thunderstorms. waves calm to 2 feet. 
.tuesday night...north winds 5 to 15 knots backing west after
midnight. a chance of thunderstorms through midnight. a chance of
showers. waves calm to 2 feet. 
.wednesday...west winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. a chance of showers. waves calm to
2 feet. 
.wednesday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...west winds 5 to 15 knots veering north. waves calm to
2 feet. 
.friday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 240756
glfls 
expires:202608242000;;269382

open lake forecast for lake superior
national weather service marquette mi
356 am edt mon aug 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 30.1 inch high pressure moves through the western great lakes 
today before moving into the ohio river valley by tonight.
meanwhile, 29.7 inch clipper low pressure over saskatchewan this 
morning moves over lake winnipeg on tuesday. this clipper moves over 
lake superior tuesday night before lifting away towards james bay 
and northern quebec wednesday night into thursday morning. 30.0 inch 
high pressure ridging returns to lake superior by thursday 
afternoon, increasing to 30.2 inches thursday night into friday as 
the high's center moves overhead. 




lsz263-242000-
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-
356 am edt mon aug 24 2026

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...north winds 5 to 15 knots backing southwest late. waves
calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing southeast late. a
chance of showers. a chance of thunderstorms by mid afternoon.
waves calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots veering southwest
after midnight. showers through midnight. a chance of
thunderstorms. a chance of showers after midnight. waves calm to
2 feet. 
.wednesday...west winds 15 to 25 knots. a chance of showers.
waves building to 1 to 3 feet. 
.wednesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots veering north. waves
calm to 2 feet. 
.friday...north winds 5 to 15 knots veering south. waves calm to
2 feet. 

$$