fzus63 kmqt 262101
glfls 
expires:202512270900;;274693

open lake forecast for lake superior
national weather service marquette mi
400 pm est fri dec 26 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...

30.1 inch ridging builds across the region tonight before another 
low of 29.6 inches then lifts over lower michigan sunday while 
extending a 29.8 inch trough northward across the lake. by monday, a 
strong high pressure of at least 30.6 inches will reside over the 
great plains as the low deepens to 29.0 inches over quebec, yielding 
a tight pressure gradient across the great lakes.



lsz162-270900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est fri dec 26 2025 /300 pm cst fri dec 26 2025/

...gale watch in effect from sunday evening through monday
evening...

.late this afternoon...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...northwest winds 5 to 15 knots backing southwest by
midnight, then backing south late. waves calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots increasing to 10 to
20 knots. a chance of rain showers. waves calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots veering south by
midnight. a chance of rain showers. waves calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots becoming north 15 to
25 knots in the afternoon. a chance of rain showers, possibly
mixed with snow in the morning, then snow showers, possibly mixed
with rain in the afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.sunday night...north gales to 45 knots. snow showers. heavy
freezing spray after midnight. waves building to 6 to 9 feet
occasionally to 11 feet. 
.monday...north gales to 40 knots backing northwest in the
afternoon. heavy freezing spray. a chance of snow showers. waves
subsiding to 4 to 7 feet occasionally to 9 feet. 
.monday night...northwest gales to 40 knots diminishing to 15 to
25 knots after midnight. a chance of snow showers after midnight.
waves subsiding to 1 to 3 feet. 
.tuesday...west winds 15 to 25 knots becoming northwest gales to
35 knots. snow showers likely. waves subsiding to calm to 2 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.wednesday...northwest gales to 40 knots. waves building to 3 to
6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 262101
glfls 
expires:202512270900;;274694

open lake forecast for lake superior
national weather service marquette mi
400 pm est fri dec 26 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...

30.1 inch ridging builds across the region tonight before another 
low of 29.6 inches then lifts over lower michigan sunday while 
extending a 29.8 inch trough northward across the lake. by monday, a 
strong high pressure of at least 30.6 inches will reside over the 
great plains as the low deepens to 29.0 inches over quebec, yielding 
a tight pressure gradient across the great lakes.



lsz263-270900-
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 fri dec 26 2025

...gale watch in effect from sunday evening through monday
evening...

.late this afternoon...northwest winds 5 to 15 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...northwest winds less than 10 knots backing southwest
by midnight, then becoming south 5 to 15 knots late. waves
subsiding to calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots becoming south 10 to
20 knots by mid afternoon. a slight chance of rain showers. waves
building to 2 to 4 feet. 
.saturday night...south winds 10 to 20 knots diminishing to 5 to
15 knots by midnight. a chance of rain showers. waves subsiding
to 1 to 3 feet. 
.sunday...northwest winds 5 to 15 knots becoming north 15 to
25 knots in the afternoon. a chance of rain showers in the
morning, then rain and snow showers likely in the afternoon.
waves subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.sunday night...north gales to 45 knots. freezing spray. snow
showers. waves building to 12 to 17 feet occasionally to 21 feet.
.monday...north gales to 45 knots. heavy freezing spray. a chance
of snow showers. waves subsiding to 9 to 12 feet occasionally to
15 feet. 
.monday night...northwest gales to 40 knots diminishing to 20 to
30 knots after midnight. freezing spray in the evening. a chance
of snow showers after midnight. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...west winds 20 to 30 knots becoming northwest gales to
40 knots. a chance of snow showers. heavy freezing spray. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
6 to 9 feet occasionally to 11 feet. 
.wednesday...northwest gales to 45 knots. heavy freezing spray.
waves building to 7 to 10 feet occasionally to 13 feet. 

note, wave height forecasts are for ice free areas.

$$