fzus63 kmqt 301501
glfls 
expires:202512302100;;498749

open lake forecast for lake superior
national weather service marquette mi
1000 am est tue dec 30 2025

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 low of 28.7 inches retrogrades from eastern quebec toward hudson 
bay through tonight as it strengthens to 28.3 inches. meanwhile a 
30.7 inch ridge will build from the canadian prairies into the upper 
mississippi valley wednesday into thursday while weakening to 30.2 
inches. this configuration will persist into friday.



lsz162-302100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est tue dec 30 2025 /900 am cst tue dec 30 2025/

.rest of today...west winds 5 to 15 knots veering northwest by
mid afternoon. patchy fog late in the morning. snow showers
likely. waves calm to 2 feet. 
.tonight...northwest winds 10 to 20 knots increasing to 15 to
25 knots by midnight. a chance of snow showers, possibly mixed
with freezing rain. waves building to 3 to 5 feet occasionally to
7 feet. 
.wednesday...northwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. a slight chance of snow showers in the
morning. waves 3 to 5 feet occasionally to 7 feet. 
.wednesday night...northwest winds 20 to 30 knots. waves 3 to
5 feet occasionally to 7 feet. 
.thursday...west winds 15 to 25 knots. a chance of snow showers
in the afternoon. waves subsiding to 2 to 4 feet. 
.thursday night...west winds 15 to 25 knots. waves subsiding to
1 to 3 feet. 
.friday...west winds 15 to 25 knots becoming northwest 10 to
20 knots. waves subsiding to calm to 2 feet. 
.saturday...northwest 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 301501
glfls 
expires:202512302100;;498750

open lake forecast for lake superior
national weather service marquette mi
1000 am est tue dec 30 2025

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 low of 28.7 inches retrogrades from eastern quebec toward hudson 
bay through tonight as it strengthens to 28.3 inches. meanwhile a 
30.7 inch ridge will build from the canadian prairies into the upper 
mississippi valley wednesday into thursday while weakening to 30.2 
inches. this configuration will persist into friday.



lsz263-302100-
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 tue dec 30 2025

...heavy freezing spray warning in effect from wednesday morning
through thursday evening...

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

note, wave height forecasts are for ice free areas.

$$