fzus63 kmqt 130301
glfls 
expires:202511130900;;318473

open lake forecast for lake superior
national weather service marquette mi
1001 pm est wed nov 12 2025

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...

heights are rising across the lake tonight on the back edge of an 
exiting trough, eventually peaking at 30.0 to 30.1 inches thursday 
night ahead of a 29.2 inch low lifting out of alberta. this low 
looks to bring troughing of around 29.4 inches across lake superior 
on saturday. by the end of the weekend, lake superior looks to be 
between low pressure of near 28.7 inches over the canadian maritimes 
and high pressure of near 30.1 inches over the canadian prairies. 
ridging then builds in from the canadian prairies and plains over 
lake superior to 30.1 to 30.2 inches by monday night.



lsz162-130900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm est wed nov 12 2025 /901 pm cst wed nov 12 2025/

.rest of tonight...northwest winds 20 to 30 knots becoming west
15 to 25 knots by midnight. waves 2 to 4 feet. 
.thursday...west winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.thursday night...west winds 5 to 15 knots backing east by
midnight. waves calm to 2 feet. 
.friday...southeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. waves calm to 2 feet. 
.friday night...south winds 10 to 20 knots veering southwest
after midnight. waves building to 1 to 3 feet. 
.saturday...west winds 10 to 20 knots increasing to 20 to
30 knots in the afternoon. a chance of rain showers. waves
building to 3 to 5 feet occasionally to 7 feet. 
.saturday night...northwest gales to 35 knots diminishing to
20 to 30 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.sunday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. waves subsiding to calm to 2 feet. 
.monday...northwest winds 5 to 15 knots becoming northeast 10 to
20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 130301
glfls 
expires:202511130900;;318474

open lake forecast for lake superior
national weather service marquette mi
1001 pm est wed nov 12 2025

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...

heights are rising across the lake tonight on the back edge of an 
exiting trough, eventually peaking at 30.0 to 30.1 inches thursday 
night ahead of a 29.2 inch low lifting out of alberta. this low 
looks to bring troughing of around 29.4 inches across lake superior 
on saturday. by the end of the weekend, lake superior looks to be 
between low pressure of near 28.7 inches over the canadian maritimes 
and high pressure of near 30.1 inches over the canadian prairies. 
ridging then builds in from the canadian prairies and plains over 
lake superior to 30.1 to 30.2 inches by monday night.



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-
1001 pm est wed nov 12 2025

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

$$