fzus63 kmqt 190301
glfls 
expires:202601190900;;133562

open lake forecast for lake superior
national weather service marquette mi
1000 pm est sun jan 18 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 low of 29.6 inches over eastern lake superior will drop south into 
the eastern u.p by monday morning. the low then moves to quebec on 
monday while a high pressure of 30.6 inches drops south over the 
plains. this builds weak ridging of 30.0 inches over much of lake 
superior on monday which strengthens to 30.1 inches by tuesday 
morning. a low of at least 29.8 inches then moves over lake superior 
on wednesday. as the low continues east on thursday, a weak remnant 
trough of 30.0 inches extends over the lake. after that, a 30.8 inch 
high builds from the canadian prairies into the northern plains 
thursday night through friday. this high will build into the upper 
midwest friday night into saturday.



lsz162-190900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm est sun jan 18 2026 /900 pm cst sun jan 18 2026/

...gale warning in effect until 7 am est /6 am cst/ monday...
...heavy freezing spray warning in effect through monday
evening...

.rest of tonight...north gales to 40 knots becoming northwest
gales to 35 knots late. heavy freezing spray. a chance of snow
showers. waves 4 to 7 feet occasionally to 9 feet building to
6 to 9 feet occasionally to 11 feet. 
.monday...northwest gales to 35 knots diminishing to 20 to
30 knots. heavy freezing spray in the morning. a slight chance of
snow showers. waves subsiding to 3 to 6 feet occasionally to
8 feet. 
.monday night...northwest winds 15 to 25 knots backing west late.
a chance of snow showers. waves subsiding to 2 to 4 feet. 
.tuesday...west winds 15 to 25 knots. waves 2 to 4 feet. 
.tuesday night...west winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.wednesday...west winds 10 to 20 knots becoming northwest 15 to
25 knots in the afternoon. a chance of snow showers. waves
building to 2 to 4 feet. 
.wednesday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. waves 2 to 4 feet. 
.thursday...northwest winds 15 to 25 knots. waves subsiding to
calm to 2 feet. 
.friday...northwest winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 190301
glfls 
expires:202601190900;;133563

open lake forecast for lake superior
national weather service marquette mi
1000 pm est sun jan 18 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 low of 29.6 inches over eastern lake superior will drop south into 
the eastern u.p by monday morning. the low then moves to quebec on 
monday while a high pressure of 30.6 inches drops south over the 
plains. this builds weak ridging of 30.0 inches over much of lake 
superior on monday which strengthens to 30.1 inches by tuesday 
morning. a low of at least 29.8 inches then moves over lake superior 
on wednesday. as the low continues east on thursday, a weak remnant 
trough of 30.0 inches extends over the lake. after that, a 30.8 inch 
high builds from the canadian prairies into the northern plains 
thursday night through friday. this high will build into the upper 
midwest friday night into saturday.



lsz263-190900-
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 pm est sun jan 18 2026

...gale warning in effect until 7 am est monday...
...heavy freezing spray warning in effect through tuesday
evening...

.rest of tonight...north gales to 35 knots. heavy freezing spray.
snow showers. waves 5 to 8 feet occasionally to 10 feet building
to 8 to 11 feet occasionally to 14 feet. 
.monday...northwest gales to 35 knots diminishing to 20 to
30 knots. heavy freezing spray. snow showers likely. waves
subsiding to 5 to 8 feet occasionally to 10 feet. 
.monday night...northwest winds 15 to 25 knots. heavy freezing
spray. a chance of snow showers. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...west winds 15 to 25 knots. a slight chance of snow
showers. waves 3 to 6 feet occasionally to 8 feet. 
.tuesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to 2 to 4 feet. 
.wednesday...west winds 10 to 20 knots becoming northwest 15 to
25 knots in the afternoon. a chance of snow showers. waves
subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.wednesday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. heavy freezing spray. waves
building to 3 to 6 feet occasionally to 8 feet. 
.thursday...northwest winds 15 to 25 knots. waves subsiding to
3 to 5 feet occasionally to 7 feet. 
.friday...northwest winds 15 to 25 knots. waves subsiding to 2 to
4 feet, then building to 3 to 5 feet occasionally to 7 feet. 

note, wave height forecasts are for ice free areas.

$$