fzus63 kmqt 211501
glfls 
expires:202601212100;;272909

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed jan 21 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 29.9 inch low continues to move over lake michigan this morning 
while a 29.7 inch low drops south through ontario. the first low 
will move over the michigan lower peninsula at 29.9 inches as the 
second low deepens to 29.6 inches over lake superior by this 
evening. these features consolidate into a 29.7 inch low over 
northeastern ontario wednesday night before shifting to quebec 
thursday morning. in the wake of the low, 31.0 inch high pressure 
will be over saskatchewan, shifting over the dakotas friday and 
overspreading the upper midwest at around 30.7 inches saturday. 
remnant ridging of at least 30.3 inches remains over lake superior 
through sunday.



lsz162-212100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est wed jan 21 2026 /900 am cst wed jan 21 2026/

...heavy freezing spray warning in effect from late tonight
through friday afternoon...

.rest of today...west winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. a chance of snow showers. waves 2 to
4 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. a slight chance of snow showers. waves building to
4 to 7 feet occasionally to 9 feet. 
.thursday...northwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. scattered snow showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.thursday night...northwest winds 20 to 30 knots. heavy freezing
spray in the evening. a chance of snow showers. waves subsiding
to 3 to 5 feet occasionally to 7 feet. 
.friday...northwest winds 15 to 25 knots. a chance of snow
showers. waves subsiding to 1 to 3 feet. 
.friday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. a chance of snow showers. waves
subsiding to calm to 2 feet. 
.saturday...west winds 5 to 15 knots. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots increasing to 10 to 20 knots.
waves calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 211501
glfls 
expires:202601212100;;272910

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed jan 21 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 29.9 inch low continues to move over lake michigan this morning 
while a 29.7 inch low drops south through ontario. the first low 
will move over the michigan lower peninsula at 29.9 inches as the 
second low deepens to 29.6 inches over lake superior by this 
evening. these features consolidate into a 29.7 inch low over 
northeastern ontario wednesday night before shifting to quebec 
thursday morning. in the wake of the low, 31.0 inch high pressure 
will be over saskatchewan, shifting over the dakotas friday and 
overspreading the upper midwest at around 30.7 inches saturday. 
remnant ridging of at least 30.3 inches remains over lake superior 
through sunday.



lsz263-212100-
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 wed jan 21 2026

...heavy freezing spray warning in effect from 7 pm est this
evening through friday evening...

.rest of today...southwest winds 10 to 20 knots veering west by
late morning, then increasing to 15 to 25 knots by mid afternoon.
snow showers likely. waves 3 to 6 feet occasionally to 8 feet. 
.tonight...northwest winds 15 to 25 knots increasing to 20 to
30 knots by midnight. heavy freezing spray. scattered snow
showers. waves building to 7 to 10 feet occasionally to 13 feet. 
.thursday...northwest winds 20 to 30 knots. heavy freezing spray.
scattered snow showers. waves subsiding to 5 to 8 feet
occasionally to 10 feet, then building to 6 to 9 feet
occasionally to 11 feet. 
.thursday night...northwest winds 20 to 30 knots. heavy freezing
spray. a chance of snow showers in the evening. snow showers
likely after midnight. waves subsiding to 5 to 8 feet
occasionally to 10 feet. 
.friday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. heavy freezing spray in the morning.
snow showers likely in the morning, then a chance of snow showers
in the afternoon. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.friday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. a chance of snow showers. waves
subsiding to 1 to 3 feet. 
.saturday...west winds 5 to 15 knots. waves 1 to 3 feet. 
.sunday...west winds 10 to 20 knots increasing to 15 to 25 knots.
waves subsiding to calm to 2 feet, then building to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$