fzus63 kmqt 140801
glfls 
expires:202605142000;;533618

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu may 14 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 over lake superior today will be pressed southeast 
tonight into friday as a 29.1 inch low moves from the canadian 
prairies to northern ontario. 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, with high 
pressure building back into the region tuesday night.



lsz162-142000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt thu may 14 2026 /301 am cdt thu may 14 2026/

.early this morning...east winds 5 to 15 knots. waves calm to
2 feet. 
.today...east winds 5 to 15 knots increasing to 15 to 25 knots.
waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.tonight...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, then subsiding to 2 to
4 feet. 
.friday...southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.friday night...southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.saturday...west winds 10 to 20 knots. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 
.saturday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.sunday...northeast gales to 35 knots. a chance of rain showers.
a chance of thunderstorms. rain showers. waves building to 7 to
10 feet occasionally to 13 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 2 to 4 feet. 

$$

fzus63 kmqt 140801
glfls 
expires:202605142000;;533619

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu may 14 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 over lake superior today will be pressed southeast 
tonight into friday as a 29.1 inch low moves from the canadian 
prairies to northern ontario. 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, with high 
pressure building back into the region tuesday night.



lsz263-142000-
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 thu may 14 2026

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

$$