fzus63 kmqt 132002
glfls 
expires:202605140800;;506689

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed may 13 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... 

30.1 inch ridging builds over lake superior tonight into thursday in 
the wake of a 29.6 inch low over southern ontario. 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 
and 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.



lsz162-140800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt wed may 13 2026 /301 pm cdt wed may 13 2026/

.late this afternoon...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...north winds 5 to 15 knots veering east late. waves
calm to 2 feet. 
.thursday...east winds 5 to 15 knots increasing to 10 to 20 knots
late. waves building to 1 to 3 feet. 
.thursday night...east winds 10 to 20 knots becoming south 15 to
25 knots after midnight. a chance of rain showers. waves building
to 3 to 5 feet occasionally to 7 feet. 
.friday...southwest winds 15 to 25 knots. waves building to 4 to
7 feet occasionally to 9 feet. 
.friday night...west winds 15 to 25 knots. waves subsiding to
2 to 4 feet. 
.saturday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.saturday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...northeast gales to 35 knots. a chance of rain showers,
then rain showers and a chance of thunderstorms. waves building
to 8 to 11 feet occasionally to 14 feet, then subsiding to 5 to
8 feet occasionally to 10 feet. 
.monday...northeast winds 20 to 30 knots becoming northwest 10 to
20 knots. rain showers. waves subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 132002
glfls 
expires:202605140800;;506690

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed may 13 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... 

30.1 inch ridging builds over lake superior tonight into thursday in 
the wake of a 29.6 inch low over southern ontario. 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 
and 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.



lsz263-140800-
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 pm edt wed may 13 2026

.late this afternoon...west winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...west winds 5 to 15 knots veering north after midnight,
then becoming east less than 10 knots late. waves calm to 2 feet.
.thursday...east winds less than 10 knots increasing to 10 to
20 knots. waves building to 1 to 3 feet. 
.thursday night...southeast winds 15 to 25 knots veering south
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 15 to 25 knots becoming southwest 20 to
30 knots by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet. 
.friday night...southwest winds 20 to 30 knots becoming west
15 to 25 knots after midnight. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet. 
.saturday night...northeast winds 5 to 15 knots veering east
after midnight. waves subsiding to calm to 2 feet. 
.sunday...east winds 20 to 30 knots increasing to gales to
35 knots. rain showers likely and a chance of thunderstorms.
waves building to 5 to 8 feet occasionally to 10 feet. 
.monday...northeast gales to 35 knots becoming west 15 to
25 knots. rain showers and a chance of thunderstorms. waves
building to 6 to 9 feet occasionally to 11 feet, then subsiding
to 3 to 5 feet occasionally to 7 feet. 

$$