fzus63 kmqt 222101
glfls 
expires:202601230900;;346932

open lake forecast for lake superior
national weather service marquette mi
400 pm est thu jan 22 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...

ridging will increase to 30.3 inches across lake superior tonight as 
a 29.6 low departs into northern quebec. high pressure will 
gradually increase to 30.6 inches over the lake through saturday as 
a 31.1 inch high currently over the canadian prairies slides 
southeast to the upper mississippi river valley at 30.9 inches. 
remnant ridging of at least 30.3 inches remains over lake superior 
through sunday as high pressure gradually weakens. a 29.8 inch 
trough will cross the lake monday night, followed by ridging of 
around 30.1 inches during the early to middle part of next week.



lsz162-230900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est thu jan 22 2026 /300 pm cst thu jan 22 2026/

...heavy freezing spray warning in effect through friday
afternoon...

.late this afternoon...northwest winds to 30 knots with a few
gale force gusts to 35 knots possible. heavy freezing spray. a
slight chance of snow. waves 6 to 9 feet occasionally to 11 feet
building to 7 to 10 feet occasionally to 13 feet. 
.tonight...northwest winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 20 to 30 knots by
midnight. heavy freezing spray. a chance of snow. waves subsiding
to 4 to 7 feet occasionally to 9 feet. 
.friday...northwest winds 15 to 25 knots. a chance of snow. waves
subsiding to 2 to 4 feet. 
.friday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots late. a slight chance of snow in the evening. waves
subsiding to calm to 2 feet. 
.saturday...west winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots. waves calm to 2 feet.
.sunday...northwest winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.monday...west winds 15 to 25 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.tuesday...northwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 222101
glfls 
expires:202601230900;;346933

open lake forecast for lake superior
national weather service marquette mi
400 pm est thu jan 22 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...

ridging will increase to 30.3 inches across lake superior tonight as 
a 29.6 low departs into northern quebec. high pressure will 
gradually increase to 30.6 inches over the lake through saturday as 
a 31.1 inch high currently over the canadian prairies slides 
southeast to the upper mississippi river valley at 30.9 inches. 
remnant ridging of at least 30.3 inches remains over lake superior 
through sunday as high pressure gradually weakens. a 29.8 inch 
trough will cross the lake monday night, followed by ridging of 
around 30.1 inches during the early to middle part of next week.



lsz263-230900-
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 pm est thu jan 22 2026

...heavy freezing spray warning in effect through friday
evening...

.late this afternoon...northwest winds 20 to 30 knots. heavy
freezing spray. snow likely. waves 8 to 11 feet occasionally to
14 feet building to 9 to 12 feet occasionally to 15 feet. 
.tonight...northwest winds 20 to 30 knots. heavy freezing spray.
snow likely. waves subsiding to 6 to 9 feet occasionally to
11 feet. 
.friday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. heavy freezing spray. snow likely. waves subsiding to
3 to 6 feet occasionally to 8 feet. 
.friday night...northwest winds 15 to 25 knots diminishing to
5 to 15 knots. a chance of snow in the evening. waves subsiding
to 1 to 3 feet. 
.saturday...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.saturday night...southwest winds 5 to 15 knots veering west
after midnight. waves calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 1 to 3 feet. 
.monday...west winds 20 to 30 knots. heavy freezing spray. waves
building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...northwest winds 15 to 25 knots. waves subsiding to
2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$