fzus63 kmqt 080201
glfls 
expires:202609080800;;085195

open lake forecast for lake superior
national weather service marquette mi
1000 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 tracks northeast to the canadian prairies before 
approaching hudson bay and deepening 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-
1000 pm edt mon sep 7 2026 /900 pm cdt mon sep 7 2026/

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

.rest of tonight...east winds 10 to 20 knots veering southeast
after midnight, then becoming south 15 to 25 knots late. a chance
of showers by midnight. a chance of thunderstorms. showers after
midnight. waves calm to 2 feet 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 080201
glfls 
expires:202609080800;;085196

open lake forecast for lake superior
national weather service marquette mi
1000 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 tracks northeast to the canadian prairies before 
approaching hudson bay and deepening 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-
1000 pm edt mon sep 7 2026

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

.rest of tonight...southeast 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 calm
to 2 feet 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. 

$$