fzus63 kmqt 250201
glfls 
expires:202608250800;;310067

open lake forecast for lake superior
national weather service marquette mi
1000 pm 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 30.0 inch high pressure over the western great lakes will shift 
south to the lower peninsula of michigan on tuesday, building to 
30.1 inches. meanwhile, a 29.7 inch clipper low pressure over 
manitoba moves to western ontario on tuesday, weakening to 29.8 
inches. this clipper moves over lake superior by wednesday morning 
before lifting away towards james bay and northern quebec wednesday 
night into thursday morning. 30.1 inch high pressure ridging returns 
to lake superior by friday afternoon, building to 30.2 inches over 
the lower great lakes for saturday. 




lsz162-250800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt mon aug 24 2026 /900 pm cdt mon aug 24 2026/

.rest of tonight...east winds 5 to 15 knots. a slight chance of
showers after midnight. waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots. a chance of showers and
thunderstorms. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots veering west after
midnight, then increasing to 10 to 20 knots late. a chance of
thunderstorms through midnight. a chance of showers. waves calm
to 2 feet. 
.wednesday...west winds 10 to 20 knots. a slight chance of
showers. waves calm to 2 feet. 
.wednesday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...northwest winds 5 to 15 knots backing southwest by
mid afternoon. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 

$$

fzus63 kmqt 250201
glfls 
expires:202608250800;;310068

open lake forecast for lake superior
national weather service marquette mi
1000 pm 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 30.0 inch high pressure over the western great lakes will shift 
south to the lower peninsula of michigan on tuesday, building to 
30.1 inches. meanwhile, a 29.7 inch clipper low pressure over 
manitoba moves to western ontario on tuesday, weakening to 29.8 
inches. this clipper moves over lake superior by wednesday morning 
before lifting away towards james bay and northern quebec wednesday 
night into thursday morning. 30.1 inch high pressure ridging returns 
to lake superior by friday afternoon, building to 30.2 inches over 
the lower great lakes for saturday. 




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-
1000 pm edt mon aug 24 2026

.rest of tonight...southeast winds 5 to 15 knots veering south
late. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing east late. a chance
of showers. a chance of thunderstorms by mid afternoon. waves
calm to 2 feet. 
.tuesday night...south winds 5 to 15 knots veering southwest
after midnight, then becoming west 10 to 20 knots late. a chance
of showers and thunderstorms. waves calm to 2 feet. 
.wednesday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. a slight chance of showers. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.wednesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.friday...south winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 

$$