fzus63 kmqt 200901
glfls 
expires:202601202100;;203135

open lake forecast for lake superior
national weather service marquette mi
400 am est tue jan 20 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...

troughing of at least 30.0 inches is over lake superior while 30.5 
inch high sits over the lower mississippi valley and a 29.7 inch low 
is over hudson bay. by tuesday night, the high will shift over the 
virginias at 30.6 inches while the low remains stationary. 
meanwhile, a 30.0 inch low forms over the ok panhandle, quickly 
moving over lake michigan by wednesday morning while the a 29.8 inch 
low drops south through ontario. by midday wednesday, the first low 
will move over the michigan lower peninsula at 29.9 inches as the 
second low deeps to 29.7 inches over lake superior by 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.



lsz162-202100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est tue jan 20 2026 /300 am cst tue jan 20 2026/

.early this morning...west winds 15 to 25 knots. scattered snow
showers. waves 3 to 6 feet occasionally to 8 feet. 
.today...west winds 15 to 25 knots. scattered snow showers. waves
3 to 6 feet occasionally to 8 feet. 
.tonight...west winds 15 to 25 knots diminishing to 10 to
20 knots late. isolated snow showers. waves subsiding to 1 to
3 feet. 
.wednesday...west winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. a chance of snow showers. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.wednesday night...northwest winds 15 to 25 knots. waves building
to 3 to 5 feet occasionally to 7 feet. 
.thursday...northwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. waves 3 to 5 feet occasionally to
7 feet. 
.thursday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. waves subsiding to 2 to 4 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.saturday...west winds 10 to 20 knots. waves calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 200901
glfls 
expires:202601202100;;203136

open lake forecast for lake superior
national weather service marquette mi
400 am est tue jan 20 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...

troughing of at least 30.0 inches is over lake superior while 30.5 
inch high sits over the lower mississippi valley and a 29.7 inch low 
is over hudson bay. by tuesday night, the high will shift over the 
virginias at 30.6 inches while the low remains stationary. 
meanwhile, a 30.0 inch low forms over the ok panhandle, quickly 
moving over lake michigan by wednesday morning while the a 29.8 inch 
low drops south through ontario. by midday wednesday, the first low 
will move over the michigan lower peninsula at 29.9 inches as the 
second low deeps to 29.7 inches over lake superior by 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.



lsz263-202100-
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 tue jan 20 2026

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

.early this morning...west winds 15 to 25 knots. heavy freezing
spray. scattered snow showers. waves 5 to 8 feet occasionally to
10 feet. 
.today...west winds 15 to 25 knots increasing to 20 to 30 knots.
heavy freezing spray. scattered snow showers. waves building to
6 to 9 feet occasionally to 11 feet. 
.tonight...west winds 15 to 25 knots diminishing to 10 to
20 knots late. freezing spray in the evening. scattered snow
showers. waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.wednesday...north winds 5 to 15 knots becoming west 10 to
20 knots. a chance of snow showers. waves subsiding to 1 to
3 feet, then building to 2 to 4 feet. 
.wednesday night...northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. heavy freezing spray. a slight
chance of snow showers. waves building to 5 to 8 feet
occasionally to 10 feet. 
.thursday...northwest winds 20 to 30 knots. heavy freezing spray.
a chance of snow showers. waves subsiding to 4 to 8 feet
occasionally to 10 feet. 
.thursday night...northwest winds 20 to 30 knots. heavy freezing
spray. a chance of snow showers. waves 5 to 8 feet occasionally
to 10 feet. 
.friday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. heavy freezing spray. waves subsiding to 1 to 3 feet. 
.saturday...west winds 5 to 15 knots. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$