fzus63 kmqt 112025
glfls 
expires:202605120430;;400083

open lake forecast for lake superior
national weather service marquette mi
425 pm edt mon may 11 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 high over the upper great lakes this afternoon departs 
for the lower great lakes this evening. behind it, a 29.7 inch 
clipper descends over far western lake superior tuesday morning and 
crosses upper michigan through tuesday evening. as the clipper 
departs eastward early wednesday, ridging moves back over lake 
superior, building to 30.1 inches wednesday night into thursday. 
this ridging is pressed southeast to the lower great lakes late 
thursday into friday while a 29.1 inch low emanates off the northern 
rockies. this low is expected to bring troughing of 29.6 inches over 
lake superior on friday and persisting through saturday.



lsz162-120430-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
425 pm edt mon may 11 2026 /325 pm cdt mon may 11 2026/

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

$$

fzus63 kmqt 112025
glfls 
expires:202605120430;;400084

open lake forecast for lake superior
national weather service marquette mi
425 pm edt mon may 11 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 high over the upper great lakes this afternoon departs 
for the lower great lakes this evening. behind it, a 29.7 inch 
clipper descends over far western lake superior tuesday morning and 
crosses upper michigan through tuesday evening. as the clipper 
departs eastward early wednesday, ridging moves back over lake 
superior, building to 30.1 inches wednesday night into thursday. 
this ridging is pressed southeast to the lower great lakes late 
thursday into friday while a 29.1 inch low emanates off the northern 
rockies. this low is expected to bring troughing of 29.6 inches over 
lake superior on friday and persisting through saturday.



lsz263-120430-
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-
425 pm edt mon may 11 2026

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

$$