fzus63 kmqt 132001
glfls 
expires:202609140800;;399366

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun sep 13 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...

30.0 inch ridging strengthens to 30.2 inches tonight into monday. a 
low around 29.3 inches skirts by lake winnipeg into northern ontario 
monday night, bringing 29.7 inch troughing over lake superior. in 
its stead, 30.2 inch high pressure ridging develops over the 
northern plains on tuesday, which strengthens to 30.4 inches as it 
cross the upper great lakes by wednesday. the high pressure ridging 
looks to remain through the rest of the workweek. 




lsz162-140800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sun sep 13 2026 /301 pm cdt sun sep 13 2026/

...gale watch in effect from late monday night through tuesday
afternoon...

.late this afternoon...west winds 10 to 20 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots diminishing to less than
10 knots late. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. a chance of showers and a slight chance of thunderstorms by
mid afternoon. waves calm to 2 feet. 
.monday night...south winds 20 to 30 knots becoming southwest
gales to 35 knots late. showers through midnight, then a slight
chance of showers after midnight. waves building to 4 to 7 feet
occasionally to 9 feet. 
.tuesday...west gales to 40 knots. waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tuesday night...west winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. 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...southeast winds 5 to 15 knots veering west
after midnight. waves calm to 2 feet. 
.thursday...west winds 5 to 15 knots veering northeast. waves
calm to 2 feet. 
.friday...southeast winds 5 to 15 knots becoming east 10 to
20 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 132001
glfls 
expires:202609140800;;399367

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun sep 13 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...

30.0 inch ridging strengthens to 30.2 inches tonight into monday. a 
low around 29.3 inches skirts by lake winnipeg into northern ontario 
monday night, bringing 29.7 inch troughing over lake superior. in 
its stead, 30.2 inch high pressure ridging develops over the 
northern plains on tuesday, which strengthens to 30.4 inches as it 
cross the upper great lakes by wednesday. the high pressure ridging 
looks to remain through the rest of the workweek. 




lsz263-140800-
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 sun sep 13 2026

...gale watch in effect from monday evening through tuesday
evening...

.late this afternoon...west winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...south winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then becoming southeast 15 to 25 knots late. a
slight chance of showers by mid afternoon. waves calm to 2 feet. 
.monday night...south gales to 35 knots veering southwest late.
showers and a slight chance of thunderstorms through midnight,
then a chance of showers after midnight. waves building to 5 to
8 feet occasionally to 10 feet. 
.tuesday...west gales to 45 knots. waves building to 10 to
14 feet occasionally to 18 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.tuesday night...west winds 15 to 25 knots becoming northwest
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. waves calm to 2 feet. 
.wednesday night...south winds 5 to 15 knots veering southwest
after midnight. waves calm to 2 feet. 
.thursday...west winds 5 to 15 knots backing southeast. waves
calm to 2 feet. 
.friday...south winds 5 to 15 knots increasing to 10 to 20 knots.
a chance of showers. waves calm to 2 feet. 

$$