fzus63 kmqt 162001
glfls 
expires:202608170800;;307019

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun aug 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...

a 30.1 inch high pressure will expand over the midwest tonight, 
extending a 29.9 inch ridge over lake superior. this high will 
weaken on monday and shift south as a 29.9 inch through, associated 
with a 29.6 inch low over the hudson bay, builds over lake superior. 
troughing will linger through tuesday evening. as the hudson bay low 
pushes east and reaches northwest quebec tuesday night, a 30.0 inch 
high will settle over north dakota. this high moves over lake 
superior wednesday evening, expanding to cover much of the great 
lakes by thursday evening. friday into the weekend, a low pressure 
of around 29.87 inches will transit across northern ontario.




lsz162-170800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sun aug 16 2026 /301 pm cdt sun aug 16 2026/

.late this afternoon...west winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...west winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight, then backing west late. waves calm to
2 feet. 
.monday...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. waves building to 1 to 3 feet. 
.monday night...southwest winds 10 to 20 knots veering west after
midnight. a slight chance of thunderstorms through midnight. a
chance of showers. waves subsiding to calm to 2 feet. 
.tuesday...west winds 10 to 20 knots becoming southwest 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.tuesday night...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...south winds 5 to 15 knots veering southwest. a chance
of showers. waves calm to 2 feet. 
.friday...southwest winds 10 to 20 knots veering northwest. a
chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 162001
glfls 
expires:202608170800;;307020

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun aug 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...

a 30.1 inch high pressure will expand over the midwest tonight, 
extending a 29.9 inch ridge over lake superior. this high will 
weaken on monday and shift south as a 29.9 inch through, associated 
with a 29.6 inch low over the hudson bay, builds over lake superior. 
troughing will linger through tuesday evening. as the hudson bay low 
pushes east and reaches northwest quebec tuesday night, a 30.0 inch 
high will settle over north dakota. this high moves over lake 
superior wednesday evening, expanding to cover much of the great 
lakes by thursday evening. friday into the weekend, a low pressure 
of around 29.87 inches will transit across northern ontario.




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-
401 pm edt sun aug 16 2026

.late this afternoon...west winds 10 to 20 knots. waves 1 to
3 feet. 
.tonight...west winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight, then backing west late. waves subsiding
to calm to 2 feet. 
.monday...west winds 5 to 15 knots becoming southwest 15 to
25 knots in the afternoon. waves building to 2 to 4 feet. 
.monday night...southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight, then veering west late. a slight
chance of thunderstorms through midnight. a chance of showers.
waves subsiding to calm to 2 feet. 
.tuesday...west winds 10 to 20 knots. waves building to 1 to
3 feet. 
.tuesday night...west winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing southwest by
mid afternoon. waves calm to 2 feet. 
.wednesday night...southwest winds 5 to 15 knots diminishing to
less than 10 knots after midnight. waves calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots backing south. a
chance of showers. waves calm to 2 feet. 
.friday...southwest winds 15 to 25 knots becoming northwest 5 to
15 knots. a chance of showers. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet. 

$$