fzus63 kmqt 012001
glfls 
expires:202609020800;;736438

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue sep 1 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 will continue to slowly move east over ontario 
through wednesday, weakening to 29.8 inches as it reaches james bay. 
this will bring broad 29.9 inch troughing over the upper great lakes 
wednesday morning. a 29.9 inch ridge will move into the area 
wednesday evening and build to 30.0 inches through friday. ridging 
will give way to another weak trough on saturday night with ridging 
of 30.1 inches building back in for sunday.




lsz162-020800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt tue sep 1 2026 /301 pm cdt tue sep 1 2026/

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

$$

fzus63 kmqt 012001
glfls 
expires:202609020800;;736439

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue sep 1 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 will continue to slowly move east over ontario 
through wednesday, weakening to 29.8 inches as it reaches james bay. 
this will bring broad 29.9 inch troughing over the upper great lakes 
wednesday morning. a 29.9 inch ridge will move into the area 
wednesday evening and build to 30.0 inches through friday. ridging 
will give way to another weak trough on saturday night with ridging 
of 30.1 inches building back in for sunday.




lsz263-020800-
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 tue sep 1 2026

.late this afternoon...west winds 15 to 25 knots. waves 2 to
4 feet. 
.tonight...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 southwest
late. 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...northeast winds 5 to 15 knots becoming east 15 to
25 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...east winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. a chance of showers. waves calm to
2 feet. 
.friday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. waves building to 1 to 3 feet. 
.friday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...east winds 5 to 15 knots veering west. a chance of
showers. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots becoming northeast 10 to
20 knots. a chance of showers. waves building to 1 to 3 feet. 

$$