fzus63 kmqt 122101
glfls 
expires:202602130900;;526184

open lake forecast for lake superior
national weather service marquette mi
400 pm est thu feb 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 30.3 inch high pressure was over the great lakes this afternoon. 
by friday morning, the high retreats into the southern portion of 
the great lakes while a 29.8 inch low moves across far northern 
ontario. this low pulls a 29.9 inch trough over eastern lake 
superior friday afternoon. high pressure builds back to 30.1 inches 
over the great lakes by saturday morning before a weak 29.8 inch 
trough moves into the upper great lakes saturday evening. weak 
troughing of around 29.8 inches hangs out over the upper great lakes 
the rest of this weekend to monday. weak ridging of 30.2 inches is 
expected on tuesday ahead of a 29.3 inch low over the central 
rockies.



lsz162-130900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est thu feb 12 2026 /300 pm cst thu feb 12 2026/

.late this afternoon...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...southeast winds 5 to 15 knots veering southwest by
midnight, then increasing to 10 to 20 knots late. waves calm to
2 feet. 
.friday...west winds 10 to 20 knots diminishing to 5 to 15 knots.
waves calm to 2 feet. 
.friday night...north winds 5 to 15 knots becoming northeast less
than 10 knots by midnight, then becoming south 5 to 15 knots
late. waves calm to 2 feet. 
.saturday...south winds less than 10 knots becoming southwest
5 to 15 knots in the afternoon. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots. waves calm to 2 feet.
.sunday...west winds 5 to 15 knots backing southwest in the
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots. waves calm to
2 feet. 
.monday...west winds 5 to 15 knots veering northeast. waves calm
to 2 feet. 
.tuesday...northeast winds 10 to 20 knots increasing to 20 to
30 knots. a chance of snow showers, possibly mixed with rain.
waves building to 5 to 8 feet occasionally to 10 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 122101
glfls 
expires:202602130900;;526185

open lake forecast for lake superior
national weather service marquette mi
400 pm est thu feb 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 30.3 inch high pressure was over the great lakes this afternoon. 
by friday morning, the high retreats into the southern portion of 
the great lakes while a 29.8 inch low moves across far northern 
ontario. this low pulls a 29.9 inch trough over eastern lake 
superior friday afternoon. high pressure builds back to 30.1 inches 
over the great lakes by saturday morning before a weak 29.8 inch 
trough moves into the upper great lakes saturday evening. weak 
troughing of around 29.8 inches hangs out over the upper great lakes 
the rest of this weekend to monday. weak ridging of 30.2 inches is 
expected on tuesday ahead of a 29.3 inch low over the central 
rockies.



lsz263-130900-
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-
400 pm est thu feb 12 2026

.late this afternoon...southwest winds less than 10 knots. waves
calm to 2 feet. 
.tonight...south winds 5 to 15 knots becoming southwest 10 to
20 knots by midnight, then increasing to 15 to 25 knots late.
waves building to 1 to 3 feet. 
.friday...west winds 15 to 25 knots diminishing to 5 to 15 knots.
waves building to 2 to 4 feet, then subsiding to calm to 2 feet. 
.friday night...northwest winds less than 10 knots backing south
by midnight. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots veering southwest in the
afternoon. waves calm to 2 feet. 
.saturday night...southwest winds 5 to 15 knots veering west
after midnight. waves calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots backing southwest in the
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots. waves calm to
2 feet. 
.monday...west winds 5 to 15 knots backing east. waves calm to
2 feet. 
.tuesday...east winds 10 to 20 knots increasing to 20 to
30 knots. a chance of snow showers, possibly mixed with rain.
waves building to 7 to 10 feet occasionally to 13 feet. 

note, wave height forecasts are for ice free areas.

$$