fzus63 kmqt 130201
glfls 
expires:202605130800;;464634

open lake forecast for lake superior
national weather service marquette mi
1001 pm 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 low will continues to slide over northern lake 
michigan this evening. as the clipper departs eastward early 
wednesday, ridging moves back over lake superior and builds 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 canadian rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior friday 
into friday night as it tracks to near james bay at 29.3 inches by 
saturday morning. ridging of 30.1 inches builds over the lake from 
northern ontario saturday night into sunday, followed by another 
29.7 inch trough extending from the central plains early next week.



lsz162-130800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt tue may 12 2026 /901 pm cdt tue may 12 2026/

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

$$

fzus63 kmqt 130201
glfls 
expires:202605130800;;464635

open lake forecast for lake superior
national weather service marquette mi
1001 pm 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 low will continues to slide over northern lake 
michigan this evening. as the clipper departs eastward early 
wednesday, ridging moves back over lake superior and builds 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 canadian rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior friday 
into friday night as it tracks to near james bay at 29.3 inches by 
saturday morning. ridging of 30.1 inches builds over the lake from 
northern ontario saturday night into sunday, followed by another 
29.7 inch trough extending from the central plains early next week.



lsz263-130800-
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-
1001 pm edt tue may 12 2026

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

$$