fzus63 kmqt 120802
glfls 
expires:202605122000;;425336

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue may 12 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 29.7 inch clipper will move across upper michigan through this 
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, followed by a 29.8 inch trough on sunday.



lsz162-122000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt tue may 12 2026 /301 am cdt tue may 12 2026/

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

$$

fzus63 kmqt 120802
glfls 
expires:202605122000;;425337

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue may 12 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 29.7 inch clipper will move across upper michigan through this 
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, followed by a 29.8 inch trough on sunday.



lsz263-122000-
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-
401 am edt tue may 12 2026

.early this morning...southeast winds 10 to 20 knots. a chance of
rain showers. waves 2 to 4 feet. 
.today...southeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then backing north late. rain showers
through early afternoon, then a chance of rain showers by mid
afternoon. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.tonight...north winds 15 to 25 knots becoming northwest 10 to
20 knots late. a slight chance of rain showers through midnight.
waves subsiding to 2 to 4 feet. 
.wednesday...northwest winds 5 to 15 knots backing west late.
waves subsiding to calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots becoming
southeast 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 becoming south
20 to 30 knots after midnight. rain showers likely after
midnight. waves building to 3 to 6 feet occasionally to 8 feet. 
.friday...south winds 15 to 25 knots becoming west 20 to
30 knots. waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.saturday...west gales to 35 knots becoming east 10 to 20 knots.
waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to calm to 2 feet. 

$$