fzus63 kmqt 051501
glfls 
expires:202512052100;;051921

open lake forecast for lake superior
national weather service marquette mi
1000 am est fri dec 5 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 29.6 inch trough will pass over the lake this evening and tonight, 
extending from a 29.4 inch low over hudson bay. as the trough shifts 
east saturday, a 30.4 inch high builds over the northern plains then 
shifts east across the great lakes through the weekend. the next 
clipper low arrives over lake superior at around 29.7 inches on 
tuesday morning.



lsz162-052100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est fri dec 5 2025 /900 am cst fri dec 5 2025/

.rest of today...west winds 10 to 20 knots. a slight chance of
snow showers. waves 2 to 4 feet subsiding to 1 to 3 feet, then
building to 2 to 4 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. waves building to 3 to 6 feet occasionally to
8 feet. 
.saturday...northwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.saturday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.sunday...northwest winds 10 to 20 knots. waves calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots backing southwest
after midnight. waves calm to 2 feet. 
.monday...southwest winds 15 to 25 knots becoming west 10 to
20 knots. a chance of snow showers, then snow showers likely.
waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to calm to 2 feet. 
.tuesday...west winds 10 to 20 knots becoming northeast 20 to
30 knots. a chance of snow showers, then snow showers likely.
waves building to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 051501
glfls 
expires:202512052100;;051922

open lake forecast for lake superior
national weather service marquette mi
1000 am est fri dec 5 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 29.6 inch trough will pass over the lake this evening and tonight, 
extending from a 29.4 inch low over hudson bay. as the trough shifts 
east saturday, a 30.4 inch high builds over the northern plains then 
shifts east across the great lakes through the weekend. the next 
clipper low arrives over lake superior at around 29.7 inches on 
tuesday morning.



lsz263-052100-
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 fri dec 5 2025

.rest of today...west winds 10 to 20 knots. a slight chance of
snow showers. waves 3 to 6 feet occasionally to 8 feet subsiding
to 2 to 4 feet. 
.tonight...northwest winds 15 to 25 knots increasing to 20 to
30 knots by midnight. a slight chance of snow showers in the
evening. freezing spray after midnight. waves building to 5 to
8 feet occasionally to 10 feet. 
.saturday...northwest winds 20 to 30 knots diminishing to 5 to
15 knots. freezing spray in the morning. a slight chance of snow
showers in the morning. waves subsiding to 1 to 3 feet. 
.saturday night...northwest winds 10 to 20 knots. a slight chance
of snow showers after midnight. waves subsiding to calm to
2 feet, then building to 2 to 4 feet. 
.sunday...northwest winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.sunday night...northwest winds 5 to 15 knots backing west after
midnight. waves calm to 2 feet. 
.monday...southwest winds 15 to 25 knots. a chance of snow
showers. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet. 
.tuesday...northwest winds 10 to 20 knots becoming northeast
20 to 30 knots. a chance of snow showers. waves subsiding to calm
to 2 feet, then building to 4 to 7 feet occasionally to 9 feet. 

note, wave height forecasts are for ice free areas.

$$