fzus63 kmqt 190801
glfls 
expires:202609192000;;699390

open lake forecast for lake superior
national weather service marquette mi
401 am edt sat sep 19 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...

this morning, 30.3 inch high pressure over the ontario/quebec line 
weakens to 30.2 inches as it moves into western quebec. meanwhile, 
29.9 inch low pressure develops over the central plains, reaching 
iowa late this morning as a 29.8 inch low tracks across hudson bay. 
into sunday, a 30.2 inch high over the canadian prairie builds to 
30.4 inches as it moves into northwestern ontario. this high 
pressure center slowly builds to 30.5 inches as it shifts into 
quebec by midday tuesday, trailing a 30.4 inch ridge over lake 
superior. the high builds further to 30.6 inches wednesday as it 
progresses eastward.




lsz162-192000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt sat sep 19 2026 /301 am cdt sat sep 19 2026/

.early this morning...northeast winds 10 to 20 knots. waves calm
to 2 feet. 
.today...east winds 10 to 20 knots backing northeast in the
afternoon, then veering east late. waves calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots backing north after
midnight, then becoming northeast 15 to 25 knots late. waves
building to 1 to 3 feet. 
.sunday...northeast winds 20 to 30 knots veering east late. waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 6 feet occasionally to 8 feet. 
.sunday night...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. waves building to 1 to 3 feet. 
.monday night...east winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.tuesday...east winds 10 to 20 knots. waves calm to 2 feet. 
.wednesday...east winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202609192000;;699391

open lake forecast for lake superior
national weather service marquette mi
401 am edt sat sep 19 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...

this morning, 30.3 inch high pressure over the ontario/quebec line 
weakens to 30.2 inches as it moves into western quebec. meanwhile, 
29.9 inch low pressure develops over the central plains, reaching 
iowa late this morning as a 29.8 inch low tracks across hudson bay. 
into sunday, a 30.2 inch high over the canadian prairie builds to 
30.4 inches as it moves into northwestern ontario. this high 
pressure center slowly builds to 30.5 inches as it shifts into 
quebec by midday tuesday, trailing a 30.4 inch ridge over lake 
superior. the high builds further to 30.6 inches wednesday as it 
progresses eastward.




lsz263-192000-
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 sep 19 2026

.early this morning...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.today...southeast winds 5 to 15 knots backing northeast late.
waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots becoming north 10 to 20 knots
after midnight, then becoming northeast 15 to 25 knots late. a
slight chance of showers. waves building to 2 to 4 feet. 
.sunday...northeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.sunday night...east winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...east winds 5 to 15 knots increasing to 15 to 25 knots
by mid afternoon. waves building to 1 to 3 feet. 
.monday night...east winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.tuesday...east winds 10 to 20 knots veering southeast. waves
calm to 2 feet. 
.wednesday...southeast winds 10 to 20 knots becoming south 5 to
15 knots. waves calm to 2 feet. 

$$