fzus63 kmqt 180901
glfls 
expires:202601182100;;089425

open lake forecast for lake superior
national weather service marquette mi
400 am 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 clipper low of around 29.8 inches moves over lake superior today, 
deepening to 29.6 inches as it settles over the far east tonight. 
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.



lsz162-182100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est sun jan 18 2026 /300 am cst sun jan 18 2026/

...heavy freezing spray warning in effect from this evening
through monday afternoon...

.early this morning...west winds 5 to 15 knots. a chance of snow
showers. waves calm to 2 feet. 
.today...southwest winds 5 to 15 knots increasing to 10 to
20 knots by late morning, then veering northwest by mid
afternoon. a chance of snow showers in the morning, then snow
showers in the afternoon. waves building to 1 to 3 feet. 
.tonight...north winds 20 to 30 knots increasing to 30 knots with
a few gale force gusts to 35 knots possible by midnight. heavy
freezing spray. a chance of snow showers. waves building to 7 to
10 feet occasionally to 13 feet. 
.monday...northwest winds 20 to 30 knots. 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 after
midnight. waves subsiding to 1 to 3 feet. 
.tuesday...west winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. waves 1 to 3 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. a chance of snow showers. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.thursday...west winds 10 to 20 knots veering northwest. waves
subsiding to calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 180901
glfls 
expires:202601182100;;089426

open lake forecast for lake superior
national weather service marquette mi
400 am 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 clipper low of around 29.8 inches moves over lake superior today, 
deepening to 29.6 inches as it settles over the far east tonight. 
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.



lsz263-182100-
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 am est sun jan 18 2026

...heavy freezing spray warning in effect from this evening
through monday evening...
...gale warning in effect from this evening through monday
morning...

.early this morning...north winds 10 to 20 knots. a chance of
snow showers. waves 1 to 3 feet building to 2 to 4 feet. 
.today...southwest winds 10 to 20 knots veering west by mid
afternoon. a chance of snow showers in the morning, then snow
showers in the afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.tonight...north winds 20 to 30 knots increasing to gales to
35 knots by midnight. heavy freezing spray. snow showers. waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 9 to 12 feet occasionally to 15 feet. 
.monday...north winds 20 to 30 knots becoming northwest 15 to
25 knots. heavy freezing spray. a chance of snow showers. waves
subsiding to 4 to 7 feet occasionally to 9 feet. 
.monday night...northwest winds 15 to 25 knots. heavy freezing
spray. a slight chance of snow showers. waves building to 5 to
8 feet occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...west winds 15 to 25 knots. heavy freezing spray in the
afternoon. 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...northwest winds 15 to 25 knots. a chance of snow
showers. heavy freezing spray. waves building to 3 to 6 feet
occasionally to 8 feet. 
.thursday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$