fzus63 kmqt 111401
glfls 
expires:202608112000;;999158

open lake forecast for lake superior
national weather service marquette mi
1001 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 remains under weak 29.9 inch ridging 
broadly associated with 30.1 inch high pressure over the southern 
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 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 eastern 
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 to follow.




lsz162-112000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt tue aug 11 2026 /901 am cdt tue aug 11 2026/

.rest of today...west winds 5 to 15 knots backing south in the
afternoon. a slight chance of showers by late morning. waves calm
to 2 feet. 
.tonight...east winds 5 to 15 knots backing northeast after
midnight, then backing northwest late. a slight chance of showers
after midnight. 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 111401
glfls 
expires:202608112000;;999159

open lake forecast for lake superior
national weather service marquette mi
1001 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 remains under weak 29.9 inch ridging 
broadly associated with 30.1 inch high pressure over the southern 
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 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 eastern 
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 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-
1001 am edt tue aug 11 2026

.rest of today...west winds less than 10 knots backing southwest
late. waves calm to 2 feet. 
.tonight...east winds less than 10 knots veering southwest after
midnight, then veering west 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. 

$$