fzus63 kmqt 311957
glfls 
expires:202609010800;;681028

open lake forecast for lake superior
national weather service marquette mi
357 pm edt mon aug 31 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 29.4 inch low over southern saskatchewan will weaken to 29.6 
inches as it moves to east-central manitoba late tonight. this will 
bring a weak, broad 29.9 inch trough over the upper great lakes. 
weak troughing remains over the lake until ridging of around 29.9 
inches builds over the lake on wednesday and strengthens to 30.0 
inches through friday. ridging will continue to build to 30.2 inches 
by sunday morning as a high pressure center over eastern canada 
moves southward over the weekend.




lsz162-010800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
357 pm edt mon aug 31 2026 /257 pm cdt mon aug 31 2026/

.late this afternoon...west winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...southwest winds 5 to 15 knots. patchy dense fog. waves
calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots increasing to 15 to
25 knots in the afternoon, then veering west late. waves building
to 1 to 3 feet. 
.tuesday night...west winds 5 to 15 knots veering northwest after
midnight, then backing west late. waves subsiding to calm to
2 feet. 
.wednesday...northwest winds less than 10 knots becoming south
5 to 15 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.thursday night...northeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. a chance of showers. waves
subsiding to calm to 2 feet. 
.friday...northeast winds 15 to 25 knots increasing to 20 to
30 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.saturday...northeast winds 10 to 20 knots. waves calm to 2 feet.

$$

fzus63 kmqt 311957
glfls 
expires:202609010800;;681029

open lake forecast for lake superior
national weather service marquette mi
357 pm edt mon aug 31 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 29.4 inch low over southern saskatchewan will weaken to 29.6 
inches as it moves to east-central manitoba late tonight. this will 
bring a weak, broad 29.9 inch trough over the upper great lakes. 
weak troughing remains over the lake until ridging of around 29.9 
inches builds over the lake on wednesday and strengthens to 30.0 
inches through friday. ridging will continue to build to 30.2 inches 
by sunday morning as a high pressure center over eastern canada 
moves southward over the weekend.




lsz263-010800-
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-
357 pm edt mon aug 31 2026

.late this afternoon...west winds 5 to 15 knots. waves 1 to
3 feet. 
.tonight...west winds 5 to 15 knots backing southwest after
midnight. areas of dense fog. waves subsiding to calm to 2 feet. 
.tuesday...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then veering west late. patchy dense
fog through early afternoon. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.tuesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing south by mid
afternoon. a slight chance of showers through early afternoon.
waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots increasing to 15 to 25 knots
by mid afternoon. waves calm to 2 feet. 
.thursday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves calm to 2 feet. 
.friday...east winds 15 to 25 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.saturday...east winds 10 to 20 knots veering south. waves calm
to 2 feet. 

$$