fzus63 kmqt 121401
glfls 
expires:202609122000;;327553

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sat sep 12 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 29.6 inch trough tracks across the lake this morning through the 
afternoon, accompanied by a cold front. 30.0 inch ridging builds 
back in from the northern plains on sunday and strengthens to 30.2 
inches on monday. a low averaging 29.5 inches crosses northern 
ontario on tuesday, with a strong 30.4 inch high building across 
lake superior on wednesday.




lsz162-122000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt sat sep 12 2026 /900 am cdt sat sep 12 2026/

.rest of today...west winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. waves 1 to 3 feet building to 2 to
4 feet. 
.tonight...west winds 15 to 25 knots becoming northwest 10 to
20 knots after midnight. waves subsiding to 1 to 3 feet. 
.sunday...west winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon, then diminishing to 10 to 20 knots late. waves
subsiding to calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast 20 to
30 knots by mid afternoon. showers likely and a slight chance of
thunderstorms by mid afternoon. waves calm to 2 feet. 
.monday night...south gales to 35 knots veering southwest after
midnight. showers through midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...west gales to 35 knots becoming northwest 5 to
15 knots. waves subsiding to calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots backing northwest.
waves calm to 2 feet. 

$$

fzus63 kmqt 121401
glfls 
expires:202609122000;;327554

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sat sep 12 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 29.6 inch trough tracks across the lake this morning through the 
afternoon, accompanied by a cold front. 30.0 inch ridging builds 
back in from the northern plains on sunday and strengthens to 30.2 
inches on monday. a low averaging 29.5 inches crosses northern 
ontario on tuesday, with a strong 30.4 inch high building across 
lake superior on wednesday.




lsz263-122000-
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 am edt sat sep 12 2026

.rest of today...west winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. waves 3 to 6 feet occasionally to
8 feet. 
.tonight...west winds 15 to 25 knots veering northwest after
midnight, then diminishing to 10 to 20 knots late. waves
subsiding to 2 to 4 feet. 
.sunday...northwest winds 15 to 25 knots backing west in the
afternoon. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...south winds 15 to 25 knots becoming southeast 20 to
30 knots by mid afternoon. a chance of showers by mid afternoon.
waves calm to 2 feet. 
.monday night...south gales to 35 knots veering southwest after
midnight. showers through midnight, then a chance of showers
after midnight. waves building to 4 to 7 feet occasionally to
9 feet. 
.tuesday...west gales to 40 knots becoming northwest 10 to
20 knots. waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots backing northwest.
waves calm to 2 feet. 

$$