fzus63 kmqt 310900
glfls 
expires:202601312100;;840864

open lake forecast for lake superior
national weather service marquette mi
400 am est sat jan 31 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...

high pressure of 30.8 inches sags south over the great plains today, 
maintaining 30.6 inch ridging over lake superior through this 
evening. ridging breaks down tonight into sunday as a 29.8 inch low 
moves out of manitoba. this will cross lake superior as a 30.0 inch 
trough sunday night. the trough will further weaken to 30.1 inches 
over georgian bay on monday as a 30.4 inch high moves over northwest 
ontario. this high builds to 30.5 inches on tuesday as it settles 
over the upper mississippi river valley through wednesday.



lsz162-312100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est sat jan 31 2026 /300 am cst sat jan 31 2026/

.early this morning...north winds 5 to 15 knots. waves calm to
2 feet. 
.today...west winds 5 to 15 knots backing southwest. waves calm
to 2 feet. 
.tonight...southwest winds 10 to 20 knots increasing to 15 to
25 knots by midnight, then backing south late. a slight chance of
snow showers after midnight. waves building to 2 to 4 feet. 
.sunday...south winds 15 to 25 knots veering southwest by late
morning, then diminishing to 10 to 20 knots by mid afternoon. a
chance of snow showers in the morning, then snow showers likely
in the afternoon. waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet. 
.sunday night...west winds 10 to 20 knots veering northwest after
midnight. a slight chance of snow showers in the evening. waves
subsiding to calm to 2 feet. 
.monday...northwest winds 10 to 20 knots. waves calm to 2 feet. 
.monday night...north winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...north winds 5 to 15 knots backing northwest. waves
calm to 2 feet. 
.wednesday...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 310900
glfls 
expires:202601312100;;840865

open lake forecast for lake superior
national weather service marquette mi
400 am est sat jan 31 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...

high pressure of 30.8 inches sags south over the great plains today, 
maintaining 30.6 inch ridging over lake superior through this 
evening. ridging breaks down tonight into sunday as a 29.8 inch low 
moves out of manitoba. this will cross lake superior as a 30.0 inch 
trough sunday night. the trough will further weaken to 30.1 inches 
over georgian bay on monday as a 30.4 inch high moves over northwest 
ontario. this high builds to 30.5 inches on tuesday as it settles 
over the upper mississippi river valley through wednesday.



lsz263-312100-
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 sat jan 31 2026

.early this morning...north winds 5 to 15 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.today...northwest winds 5 to 15 knots backing southwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots increasing to 10 to
20 knots by midnight, then backing south late. waves building to
2 to 4 feet. 
.sunday...south winds 10 to 20 knots becoming southwest 15 to
25 knots by late morning, then diminishing to 10 to 20 knots by
mid afternoon. a chance of snow showers. waves building to 3 to
5 feet occasionally to 7 feet. 
.sunday night...west winds 10 to 20 knots veering northwest after
midnight. a slight chance of snow showers. waves subsiding to
2 to 4 feet. 
.monday...northwest winds 10 to 20 knots. waves subsiding to 1 to
3 feet. 
.monday night...north winds 10 to 20 knots. waves 1 to 3 feet. 
.tuesday...north winds 5 to 15 knots backing northwest. waves
subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots increasing to 10 to
20 knots. waves building to 1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$