fzus63 kmqt 072001
glfls 
expires:202609080800;;072368

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon sep 7 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...

ridging of 30.1 inches persists over lake superior into tonight as a 
30.4 inch high crosses far northern ontario. meanwhile, a 29.5 inch 
low developing off the northern rockies today tracks northeast to 
hudson bay and deepens to 29.1 inches by wednesday afternoon. this 
sends a 29.7 inch trough over the lake tuesday night and wednesday. 
ridging of 29.9 to 30.0 inches returns on thursday, followed by 
another trough of 29.6 to 29.7 inches on friday.




lsz162-080800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt mon sep 7 2026 /301 pm cdt mon sep 7 2026/

...gale watch in effect from wednesday morning through wednesday
afternoon...

.late this afternoon...east winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...east winds 10 to 20 knots veering southeast after
midnight, then becoming south 15 to 25 knots late. a chance of
showers through midnight. a chance of thunderstorms. showers
after midnight. waves building to 2 to 4 feet. 
.tuesday...south winds 20 to 30 knots diminishing to 15 to
25 knots late. a chance of showers and a slight chance of
thunderstorms through early afternoon. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 1 to 3 feet. 
.tuesday night...southwest winds 15 to 25 knots becoming west
20 to 30 knots late. waves building to 3 to 5 feet occasionally
to 7 feet. 
.wednesday...west gales to 35 knots. waves building to 5 to
8 feet occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.wednesday night...west winds 20 to 30 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...west winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 1 to 3 feet. 
.friday...southwest winds 20 to 30 knots veering west. a chance
of showers and thunderstorms. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.saturday...west winds 20 to 30 knots diminishing to 15 to
25 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 072001
glfls 
expires:202609080800;;072369

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon sep 7 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...

ridging of 30.1 inches persists over lake superior into tonight as a 
30.4 inch high crosses far northern ontario. meanwhile, a 29.5 inch 
low developing off the northern rockies today tracks northeast to 
hudson bay and deepens to 29.1 inches by wednesday afternoon. this 
sends a 29.7 inch trough over the lake tuesday night and wednesday. 
ridging of 29.9 to 30.0 inches returns on thursday, followed by 
another trough of 29.6 to 29.7 inches on friday.




lsz263-080800-
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 mon sep 7 2026

...gale watch in effect from wednesday morning through wednesday
evening...

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...east winds 10 to 20 knots veering south after
midnight, then increasing to 20 to 30 knots late. showers and a
slight chance of thunderstorms after midnight. waves building to
2 to 4 feet. 
.tuesday...south winds to 30 knots with a few gale force gusts to
35 knots possible diminishing to 15 to 25 knots late. showers and
a chance of thunderstorms through early afternoon, then a slight
chance of showers by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet. 
.tuesday night...southwest winds 20 to 30 knots veering west
late. a slight chance of showers through midnight. waves building
to 3 to 6 feet occasionally to 8 feet. 
.wednesday...west gales to 45 knots. waves building to 7 to
11 feet occasionally to 14 feet. 
.wednesday night...west gales to 40 knots becoming northwest
20 to 30 knots after midnight. waves subsiding to 2 to 4 feet. 
.thursday...northwest winds 10 to 20 knots backing southwest by
mid afternoon. waves subsiding to calm to 2 feet. 
.thursday night...south winds 10 to 20 knots increasing to 20 to
30 knots after midnight. waves building to 2 to 4 feet. 
.friday...southwest gales to 40 knots diminishing to 20 to
30 knots. a chance of showers and thunderstorms. waves building
to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to
4 feet. 
.saturday...west gales to 35 knots diminishing to 20 to 30 knots.
waves building to 3 to 6 feet occasionally to 8 feet, then
subsiding to 2 to 4 feet. 

$$