fzus63 kmqt 110801
glfls 
expires:202608112000;;985749

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue aug 11 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 morning, lake superior is under weak 29.9 inch ridging broadly 
associated with 30.1 inch high pressure over the appalachians while 
29.6 inch low pressure is over labrador and 29.8 inch low pressure 
is over the central plains. by tonight, the labrador low descends to 
the gulf of st lawrence and deepens to 29.5 inches while the plains 
low deepens to 29.7 inches, eroding the ridge over lake superior to 
29.8 inches. this pattern holds until thursday morning, when a 30.2 
inch high over the canadian rockies begins to extend stronger 
ridging over lake superior before eventually becoming centered over 
the lake 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 the lake, reaching ontario by sunday 
afternoon, with 30.1 inch ridging to follow.




lsz162-112000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt tue aug 11 2026 /301 am cdt tue aug 11 2026/

.early this morning...north winds less than 10 knots. waves calm
to 2 feet. 
.today...north winds less than 10 knots veering east in the
afternoon, then becoming southeast 5 to 15 knots late. a slight
chance of showers through early afternoon. waves calm to 2 feet. 
.tonight...southeast winds less than 10 knots veering west after
midnight, then becoming north 5 to 15 knots late. waves calm to
2 feet. 
.wednesday...north winds 5 to 15 knots veering south in the
afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots backing
northwest after midnight. waves calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots backing northeast
after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots. waves calm to 2 feet. 
.saturday...east winds 10 to 20 knots backing northeast. a chance
of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 110801
glfls 
expires:202608112000;;985750

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue aug 11 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 morning, lake superior is under weak 29.9 inch ridging broadly 
associated with 30.1 inch high pressure over the appalachians while 
29.6 inch low pressure is over labrador and 29.8 inch low pressure 
is over the central plains. by tonight, the labrador low descends to 
the gulf of st lawrence and deepens to 29.5 inches while the plains 
low deepens to 29.7 inches, eroding the ridge over lake superior to 
29.8 inches. this pattern holds until thursday morning, when a 30.2 
inch high over the canadian rockies begins to extend stronger 
ridging over lake superior before eventually becoming centered over 
the lake 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 the lake, reaching ontario by sunday 
afternoon, with 30.1 inch ridging to follow.




lsz263-112000-
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 tue aug 11 2026

.early this morning...west winds less than 10 knots. waves calm
to 2 feet. 
.today...west winds less than 10 knots becoming south 5 to
15 knots in the afternoon. a slight chance of showers. waves calm
to 2 feet. 
.tonight...south winds 5 to 15 knots becoming west less than
10 knots after midnight, then backing southwest late. waves calm
to 2 feet. 
.wednesday...north winds less than 10 knots becoming northwest
5 to 15 knots in the afternoon, then backing south late. waves
calm to 2 feet. 
.wednesday night...west winds less than 10 knots increasing to
5 to 15 knots after midnight. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots veering south by mid
afternoon. waves calm to 2 feet. 
.thursday night...east winds less than 10 knots backing north
after midnight. waves calm to 2 feet. 
.friday...northeast winds 5 to 15 knots veering southeast. waves
calm to 2 feet. 
.saturday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 

$$