fzus63 kmqt 130301
glfls 
expires:202601130900;;254640

open lake forecast for lake superior
national weather service marquette mi
1000 pm est mon jan 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 29.3 inch low pressure dropping out of manitoba tonight deepens to 
29.2 inches while moving over northern lake superior tuesday. this 
low then tracks through quebec tuesday night into wednesday morning. 
meanwhile, a 30.5 inch high pressure builds over the eastern dakotas 
wednesday morning, sliding over the western 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 the upper great lakes on saturday.



lsz162-130900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm est mon jan 12 2026 /900 pm cst mon jan 12 2026/

...gale watch in effect from tuesday evening through wednesday
afternoon...

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

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 130301
glfls 
expires:202601130900;;254641

open lake forecast for lake superior
national weather service marquette mi
1000 pm est mon jan 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 29.3 inch low pressure dropping out of manitoba tonight deepens to 
29.2 inches while moving over northern lake superior tuesday. this 
low then tracks through quebec tuesday night into wednesday morning. 
meanwhile, a 30.5 inch high pressure builds over the eastern dakotas 
wednesday morning, sliding over the western 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 the upper great lakes on saturday.



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-
1000 pm est mon jan 12 2026

...gale watch in effect from tuesday evening through wednesday
afternoon...

.rest of tonight...southwest winds 5 to 15 knots increasing to
10 to 20 knots by midnight. rain showers, possibly mixed with
snow after midnight. waves 1 to 3 feet building to 2 to 4 feet. 
.tuesday...west winds 15 to 25 knots. a chance of rain and snow
showers. waves building to 4 to 7 feet occasionally to 9 feet. 
.tuesday night...north gales to 45 knots. heavy freezing spray. a
slight chance of rain showers in the evening. a chance of snow
showers. waves building to 11 to 15 feet occasionally to 19 feet.
.wednesday...north gales to 40 knots diminishing to 20 to
30 knots in the afternoon. a slight chance of snow showers in the
morning. heavy freezing spray. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 
.wednesday night...north winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. freezing spray in the evening.
waves subsiding to 1 to 3 feet. 
.thursday...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. waves subsiding to calm to 2 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.thursday night...southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. a chance of snow showers. waves
subsiding to 1 to 3 feet. 
.friday...northwest winds 15 to 25 knots becoming north 20 to
30 knots. a chance of snow showers. waves building to 3 to 6 feet
occasionally to 8 feet. 
.saturday...north winds 20 to 30 knots. heavy freezing spray.
waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$