fzus63 kmqt 131501
glfls 
expires:202601132100;;281090

open lake forecast for lake superior
national weather service marquette mi
1000 am est tue jan 13 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 29.2 inch low moves over northern lake superior today. this low 
then tracks through quebec tonight into wednesday morning. 
meanwhile, a 30.5 inch high pressure builds over the eastern dakotas 
wednesday morning, sliding around the southwestern periphery of the 
great lakes thursday while weakening to 30.1 inches. the ridging is 
followed up by a 29.4 inch low moving over lake superior on friday, 
which weakens to 29.6 inches over southern ontario saturday. 
meanwhile, high pressure of at least 30.2 inches will settle west of 
the great lakes over the weekend.



lsz162-132100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est tue jan 13 2026 /900 am cst tue jan 13 2026/

...gale warning in effect from 10 pm est /9 pm cst/ this evening
through wednesday afternoon...
...heavy freezing spray warning in effect from late tonight
through wednesday afternoon...

.rest of today...west winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. a slight chance of rain showers. waves
2 to 4 feet building to 3 to 5 feet occasionally to 7 feet. 
.tonight...northwest gales to 35 knots becoming north gales to
40 knots by midnight. heavy freezing spray. waves building to
5 to 9 feet occasionally to 11 feet. 
.wednesday...north gales to 35 knots diminishing to 15 to
25 knots. heavy freezing spray in the morning. waves subsiding to
2 to 4 feet. 
.wednesday night...north winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. a slight chance of snow showers in the
morning, then snow showers likely in the afternoon. waves
building to 3 to 6 feet occasionally to 8 feet. 
.thursday night...southwest winds 20 to 30 knots becoming west
10 to 20 knots after midnight. snow showers likely in the
evening, then a chance of snow showers after midnight. waves
subsiding to calm to 2 feet. 
.friday...northwest winds 20 to 30 knots veering north. snow
showers likely, then a chance of snow showers. waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.saturday...north winds 20 to 30 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 131501
glfls 
expires:202601132100;;281091

open lake forecast for lake superior
national weather service marquette mi
1000 am est tue jan 13 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 29.2 inch low moves over northern lake superior today. this low 
then tracks through quebec tonight into wednesday morning. 
meanwhile, a 30.5 inch high pressure builds over the eastern dakotas 
wednesday morning, sliding around the southwestern periphery of the 
great lakes thursday while weakening to 30.1 inches. the ridging is 
followed up by a 29.4 inch low moving over lake superior on friday, 
which weakens to 29.6 inches over southern ontario saturday. 
meanwhile, high pressure of at least 30.2 inches will settle west of 
the great lakes over the weekend.



lsz263-132100-
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 am est tue jan 13 2026

...gale warning in effect from 7 pm est this evening through
wednesday afternoon...
...heavy freezing spray warning in effect from 10 pm est this
evening through wednesday afternoon...

.rest of today...west winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. a chance of snow showers, possibly
mixed with rain. waves 3 to 5 feet occasionally to 7 feet
building to 5 to 8 feet occasionally to 10 feet. 
.tonight...north gales to 45 knots. heavy freezing spray. a
slight chance of rain showers in the evening. a slight chance of
snow showers. waves building to 11 to 15 feet occasionally to
19 feet, then subsiding to 10 to 14 feet occasionally to 18 feet.
.wednesday...north gales to 40 knots diminishing to 20 to
30 knots by mid afternoon. heavy freezing spray. waves subsiding
to 3 to 6 feet occasionally to 8 feet. 
.wednesday night...north winds 20 to 30 knots diminishing to
10 to 20 knots after midnight. freezing spray in the evening.
waves subsiding to 1 to 3 feet. 
.thursday...southwest winds 15 to 25 knots increasing to gales to
35 knots in the afternoon. a chance of snow showers in the
afternoon. waves subsiding to calm to 2 feet, then building to
5 to 8 feet occasionally to 10 feet. 
.thursday night...southwest winds 20 to 30 knots becoming west
10 to 20 knots after midnight. a chance of snow showers. waves
subsiding to 2 to 4 feet. 
.friday...northwest winds 20 to 30 knots veering north. a chance
of snow showers. freezing spray. waves building to 5 to 8 feet
occasionally to 10 feet. 
.saturday...north winds 20 to 30 knots increasing to gales to
35 knots. heavy freezing spray. a chance of snow showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$