fzus63 kmqt 090801
glfls 
expires:202610092000;;782819

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri oct 9 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...

30.1 inch surface high pressure south of the lower great lakes 
builds to 30.2 inches later this morning, sending 30.1 inch ridging 
over lake superior. this ridge is separating a pair of 29.4 inch 
lows, one over southern alberta and one off the labrador coast. 
throughout the day and into saturday morning, the high will build to 
30.4 inches over new york as the alberta low moves to southern 
saskatchewan. meanwhile, 29.7 inch hurricane isaias will move up the 
alabama/mississippi state line, eventually helping to kick the high 
east as it weakens. by early sunday morning, the canada low will 
split into 2 weaker 29.6 inch lows, one settling over the central 
plains and one moving from northern minnesota to northern ontario. 
meanwhile, the high will shift to the new england coastline, ushered 
east by the tropical remnants now at 29.9 inches over tennessee. for 
sunday evening, the plains low will shift to eastern colorado at 
29.6 inches, extending a 29.8 inch trough over lake superior as the 
high and tropical remnants shift further east. the colorado low 
crosses the great lakes basin early next week, followed by 30.2 inch 
high pressure for the midweek.




lsz162-092000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt fri oct 9 2026 /301 am cdt fri oct 9 2026/

.early this morning...north winds less than 10 knots. waves calm
to 2 feet. 
.today...east winds less than 10 knots increasing to 15 to
25 knots. waves building to 1 to 3 feet. 
.tonight...east winds 15 to 25 knots veering southeast after
midnight, then diminishing to 10 to 20 knots late. waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.saturday...southeast winds 10 to 20 knots increasing to 20 to
30 knots in the afternoon, then veering south late. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.saturday night...south winds 20 to 30 knots veering southwest
after midnight. waves building to 3 to 6 feet occasionally to
8 feet. 
.sunday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.sunday night...northeast winds 10 to 20 knots increasing to
20 to 30 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.monday...northeast winds 20 to 30 knots diminishing to 15 to
25 knots. a chance of showers. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet. 
.tuesday...north winds 10 to 20 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 090801
glfls 
expires:202610092000;;782820

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri oct 9 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...

30.1 inch surface high pressure south of the lower great lakes 
builds to 30.2 inches later this morning, sending 30.1 inch ridging 
over lake superior. this ridge is separating a pair of 29.4 inch 
lows, one over southern alberta and one off the labrador coast. 
throughout the day and into saturday morning, the high will build to 
30.4 inches over new york as the alberta low moves to southern 
saskatchewan. meanwhile, 29.7 inch hurricane isaias will move up the 
alabama/mississippi state line, eventually helping to kick the high 
east as it weakens. by early sunday morning, the canada low will 
split into 2 weaker 29.6 inch lows, one settling over the central 
plains and one moving from northern minnesota to northern ontario. 
meanwhile, the high will shift to the new england coastline, ushered 
east by the tropical remnants now at 29.9 inches over tennessee. for 
sunday evening, the plains low will shift to eastern colorado at 
29.6 inches, extending a 29.8 inch trough over lake superior as the 
high and tropical remnants shift further east. the colorado low 
crosses the great lakes basin early next week, followed by 30.2 inch 
high pressure for the midweek.




lsz263-092000-
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 fri oct 9 2026

.early this morning...north winds 5 to 15 knots. waves calm to
2 feet. 
.today...north winds 5 to 15 knots veering east in the afternoon,
then increasing to 10 to 20 knots late. waves calm to 2 feet. 
.tonight...east winds 15 to 25 knots veering southeast after
midnight. waves building to 3 to 6 feet occasionally to 8 feet. 
.saturday...southeast winds 15 to 25 knots becoming south 20 to
30 knots in the afternoon. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.saturday night...south winds 20 to 30 knots veering southwest
after midnight. waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. 
.sunday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.sunday night...east winds 15 to 25 knots becoming northeast
20 to 30 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.monday...northeast winds 20 to 30 knots diminishing to 15 to
25 knots. a chance of rain showers. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...north winds 10 to 20 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$