fzus63 kmqt 130201
glfls 
expires:202609130800;;355765

open lake forecast for lake superior
national weather service marquette mi
1001 pm 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 29.7 inch trough continues to shift east of lake superior tonight. 
30.0 inch ridging builds back in from the northern plains on sunday 
and strengthens to 30.2 inches through monday. a low averaging 29.4 
inches crosses northern ontario on tuesday, with a strong 30.4 inch 
high building over the lake on wednesday.




lsz162-130800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt sat sep 12 2026 /901 pm cdt sat sep 12 2026/

.rest of tonight...west winds 15 to 25 knots diminishing to 10 to
20 knots late. waves 1 to 3 feet. 
.sunday...west winds 15 to 25 knots becoming northwest 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 late. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast 15 to
25 knots by mid afternoon. showers likely by mid afternoon. waves
calm to 2 feet. 
.monday night...southeast gales to 35 knots veering southwest
after midnight. showers and a slight chance of thunderstorms
through midnight, then a slight chance of showers after midnight.
waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 
.tuesday...west gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. waves subsiding to 2 to 4 feet. 
.tuesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...east winds 5 to 15 knots. waves calm to 2 feet. 
.thursday...west winds 5 to 15 knots veering northeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 130201
glfls 
expires:202609130800;;355766

open lake forecast for lake superior
national weather service marquette mi
1001 pm 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 29.7 inch trough continues to shift east of lake superior tonight. 
30.0 inch ridging builds back in from the northern plains on sunday 
and strengthens to 30.2 inches through monday. a low averaging 29.4 
inches crosses northern ontario on tuesday, with a strong 30.4 inch 
high building over the lake on wednesday.




lsz263-130800-
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-
1001 pm edt sat sep 12 2026

.rest of tonight...west winds 15 to 25 knots veering northwest
after midnight. waves 3 to 5 feet occasionally to 7 feet. 
.sunday...northwest winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon, then diminishing to 15 to 25 knots
late. waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight, then backing west late. 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 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, then subsiding to 3 to
6 feet occasionally to 8 feet. 
.tuesday...west gales to 40 knots. waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.tuesday night...northwest winds 20 to 30 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...east winds 5 to 15 knots veering south. waves calm
to 2 feet. 
.thursday...west winds 10 to 20 knots. waves calm to 2 feet. 

$$