fzus63 kmqt 170201
glfls 
expires:202609170800;;576067

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed sep 16 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...

this evening an expansive area of high pressure was over the region 
with 30.3 inch ridging over lake superior. one high pressure center, 
at 30.4 inches, was over quebec and the other, at 30.4 inches, was 
over southern manitoba. the high pressure over manitoba moves over 
northern ontario and lake superior by friday morning as the low 
pushes into quebec and another 29.9 inch low develops over south 
dakota and nebraska. the high weakens to 30.3 inches as it moves to 
the quebec/ontario line saturday morning as the low shifts to the 
upper mississippi valley. by sunday morning, another 30.3 inch high 
will move over northwestern ontario. the high shifts to northeastern 
ontario monday morning.





lsz162-170800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt wed sep 16 2026 /901 pm cdt wed sep 16 2026/

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

$$

fzus63 kmqt 170201
glfls 
expires:202609170800;;576068

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed sep 16 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...

this evening an expansive area of high pressure was over the region 
with 30.3 inch ridging over lake superior. one high pressure center, 
at 30.4 inches, was over quebec and the other, at 30.4 inches, was 
over southern manitoba. the high pressure over manitoba moves over 
northern ontario and lake superior by friday morning as the low 
pushes into quebec and another 29.9 inch low develops over south 
dakota and nebraska. the high weakens to 30.3 inches as it moves to 
the quebec/ontario line saturday morning as the low shifts to the 
upper mississippi valley. by sunday morning, another 30.3 inch high 
will move over northwestern ontario. the high shifts to northeastern 
ontario monday morning.





lsz263-170800-
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 wed sep 16 2026

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

$$