fzus63 kmqt 270201
glfls 
expires:202608270800;;420035

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed aug 26 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 29.7 inch low near james bay will continue to lift northeast as a 
a 30.1 inch high pressure over manitoba starts stretching towards 
lake superior. this high moves over the lake by friday morning 
before continuing into new england on saturday. saturday night, a 
low pressure over the central to northern plains deepens to 29.6 
inches. this low approaches the great lakes by early next week, with 
heights over lake superior falling to 29.8 inches by monday 
afternoon.




lsz162-270800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt wed aug 26 2026 /900 pm cdt wed aug 26 2026/

.rest of tonight...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...northwest winds 5 to 15 knots backing southwest in
the afternoon, then backing southeast late. waves calm to 2 feet.
.thursday night...east winds 5 to 15 knots backing northeast
after midnight. waves calm to 2 feet. 
.friday...northeast winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots backing northeast after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet. 
.saturday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.saturday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. a chance of showers. waves calm to
2 feet. 
.sunday...northeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 
.monday...east winds 15 to 25 knots becoming west 10 to 20 knots.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 270201
glfls 
expires:202608270800;;420036

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed aug 26 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 29.7 inch low near james bay will continue to lift northeast as a 
a 30.1 inch high pressure over manitoba starts stretching towards 
lake superior. this high moves over the lake by friday morning 
before continuing into new england on saturday. saturday night, a 
low pressure over the central to northern plains deepens to 29.6 
inches. this low approaches the great lakes by early next week, with 
heights over lake superior falling to 29.8 inches by monday 
afternoon.




lsz263-270800-
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 wed aug 26 2026

.rest of tonight...northwest winds 10 to 20 knots veering north
late. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots veering northeast late. a
slight chance of showers by mid afternoon. waves calm to 2 feet. 
.thursday night...east winds less than 10 knots backing north
late. waves calm to 2 feet. 
.friday...east winds less than 10 knots becoming south 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots backing east by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet. 
.sunday...east winds 10 to 20 knots diminishing to 5 to 15 knots.
a chance of showers. waves calm to 2 feet. 
.monday...south winds 10 to 20 knots becoming west 15 to
25 knots. a chance of showers. waves building to 2 to 4 feet,
then subsiding to calm to 2 feet. 

$$