fzus63 kmqt 102001
glfls 
expires:202604110800;;152402

open lake forecast for lake superior
national weather service marquette mi
400 pm edt fri apr 10 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...

a 30.3 inch ridge over lake superior builds to 30.4 inches through 
saturday as high pressure over the the upper mississippi river 
valley shifts east to the great lakes. a 29.3 inch low lifts through 
the northern plains on sunday while the high strengthens to 30.5 
inches and pushes off of the eastern seaboard into the atlantic. the 
low pushes east through the upper great lakes at 29.4 inches sunday 
night and moves into northern quebec by monday. another low will 
take shape over the central plains on monday, deepening to 29.5 
inches on tuesday with a weak 29.8 inch trough extending through the 
upper great lakes.



lsz162-110800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt fri apr 10 2026 /300 pm cdt fri apr 10 2026/

.late this afternoon...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight, then diminishing to less than 10 knots late. waves calm
to 2 feet. 
.saturday...east winds less than 10 knots increasing to 5 to
15 knots in the afternoon. a slight chance of rain showers by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 10 to 20 knots. rain showers and a
slight chance of thunderstorms. waves building to 1 to 3 feet. 
.sunday...east winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. rain showers. a slight chance of thunderstorms
by mid afternoon. waves subsiding to calm to 2 feet. 
.sunday night...west winds 5 to 15 knots increasing to 10 to
20 knots after midnight. a chance of rain showers through
midnight. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots backing east by mid afternoon.
waves calm to 2 feet. 
.monday night...northeast winds 15 to 25 knots. a chance of rain
showers through midnight. rain showers likely after midnight.
waves building to 4 to 7 feet occasionally to 9 feet. 
.tuesday...northeast winds 15 to 25 knots. a chance of rain
showers. waves subsiding to 3 to 6 feet occasionally to 8 feet,
then building to 6 to 9 feet occasionally to 11 feet. 
.wednesday...southwest winds 10 to 20 knots becoming east 5 to
15 knots. a chance of rain showers. waves subsiding to calm to
2 feet. 

$$

fzus63 kmqt 102001
glfls 
expires:202604110800;;152403

open lake forecast for lake superior
national weather service marquette mi
400 pm edt fri apr 10 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...

a 30.3 inch ridge over lake superior builds to 30.4 inches through 
saturday as high pressure over the the upper mississippi river 
valley shifts east to the great lakes. a 29.3 inch low lifts through 
the northern plains on sunday while the high strengthens to 30.5 
inches and pushes off of the eastern seaboard into the atlantic. the 
low pushes east through the upper great lakes at 29.4 inches sunday 
night and moves into northern quebec by monday. another low will 
take shape over the central plains on monday, deepening to 29.5 
inches on tuesday with a weak 29.8 inch trough extending through the 
upper great lakes.



lsz263-110800-
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 edt fri apr 10 2026

.late this afternoon...southwest winds 5 to 15 knots. waves calm
to 2 feet building to 1 to 3 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight, then diminishing to less than 10 knots late. waves
subsiding to calm to 2 feet. 
.saturday...south winds less than 10 knots backing southeast in
the afternoon, then becoming east 5 to 15 knots late. waves calm
to 2 feet. 
.saturday night...southeast winds 10 to 20 knots. a chance of
rain showers through midnight. a slight chance of thunderstorms.
rain showers after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.sunday...southeast winds 10 to 20 knots becoming south 5 to
15 knots by mid afternoon. rain showers. a slight chance of
thunderstorms by mid afternoon. waves subsiding to 2 to 4 feet. 
.sunday night...southwest winds 10 to 20 knots veering west after
midnight. a chance of rain showers through midnight. waves
subsiding to 1 to 3 feet. 
.monday...northwest winds 10 to 20 knots veering east by mid
afternoon. waves subsiding to calm to 2 feet. 
.monday night...east winds 20 to 30 knots. a chance of rain
showers through midnight. rain showers likely after midnight.
waves building to 4 to 7 feet occasionally to 9 feet. 
.tuesday...northeast winds 20 to 30 knots diminishing to 15 to
25 knots. a chance of rain showers. waves subsiding to 3 to
6 feet occasionally to 8 feet, then building to 6 to 9 feet
occasionally to 11 feet. 
.wednesday...north winds 10 to 20 knots becoming southeast 5 to
15 knots. a chance of rain showers. waves subsiding to 2 to
4 feet. 

$$