fzus63 kmqt 130201
glfls 
expires:202608130800;;089300

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

weak 29.9 inch ridging over lake superior holds through tomorrow 
morning, leading to calm open lake conditions. tomorrow morning, a 
30.2 inch high over the canadian rockies begins to extend stronger 
ridging over lake superior before eventually becoming centered over 
the lake at 30.2 inches friday afternoon. a 29.9 inch trough then 
moves over the western end of the lake saturday afternoon as the 
30.2 inch high moves over the lower great lakes. this trough 
consolidates to a 29.8 inch low as it passes over lake superior, 
reaching ontario by sunday afternoon, with 30.1 inch ridging over 
lake superior to follow.




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

.rest of tonight...north winds 5 to 15 knots. patchy fog after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet. 
.thursday...northeast winds 5 to 15 knots veering east in the
afternoon. a slight chance of showers through early afternoon.
waves calm to 2 feet. 
.thursday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.friday...northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.friday night...northeast winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...east winds 10 to 20 knots backing northeast by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.saturday night...north winds 5 to 15 knots backing northwest
after midnight. a chance of showers. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet. 
.monday...southwest winds 5 to 15 knots veering west. waves calm
to 2 feet. 

$$