fzus63 kmqt 090201
glfls 
expires:202610090800;;767688

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt thu oct 8 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...

through friday morning, a high will build to 30.2 inches south of 
the lower great lakes which will cause ridging of 30.1 inches 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 ot 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.




lsz263-090800-
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-
1000 pm edt thu oct 8 2026

.rest of tonight...west winds 5 to 15 knots veering northwest
after midnight. waves 1 to 3 feet subsiding to calm to 2 feet. 
.friday...southeast winds 5 to 15 knots becoming east 10 to
20 knots late. waves calm to 2 feet. 
.friday night...southeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight, then diminishing to 15 to 25 knots
late. waves building to 3 to 6 feet occasionally to 8 feet. 
.saturday...southeast winds 15 to 25 knots veering south by mid
afternoon. waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.saturday night...south winds 20 to 30 knots veering southwest
after midnight. waves building to 4 to 8 feet occasionally to
10 feet. 
.sunday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.sunday night...south winds 15 to 25 knots backing north after
midnight. a chance of showers. waves subsiding to calm to 2 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.monday...northeast winds 20 to 30 knots becoming north 15 to
25 knots. a chance of rain showers. waves building to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...north winds 10 to 20 knots becoming west 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 090201
glfls 
expires:202610090800;;767687

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt thu oct 8 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...

through friday morning, a high will build to 30.2 inches south of 
the lower great lakes which will cause ridging of 30.1 inches 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 ot 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.




lsz162-090800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt thu oct 8 2026 /900 pm cdt thu oct 8 2026/

.rest of tonight...west winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight, then diminishing to less than
10 knots late. waves calm to 2 feet. 
.friday...east winds less than 10 knots increasing to 15 to
25 knots. waves building to 2 to 4 feet. 
.friday night...east winds 15 to 25 knots veering southeast after
midnight. waves building to 3 to 6 feet occasionally to 8 feet. 
.saturday...southeast winds 10 to 20 knots becoming south 15 to
25 knots by mid afternoon. waves subsiding to 2 to 4 feet. 
.saturday night...south winds 20 to 30 knots becoming southwest
15 to 25 knots 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 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.sunday night...north winds 10 to 20 knots becoming northeast
15 to 25 knots after midnight. a chance of showers. waves
building to 2 to 4 feet. 
.monday...northeast winds 15 to 25 knots backing north. a chance
of showers. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.tuesday...north winds 10 to 20 knots backing west. waves
subsiding to calm to 2 feet. 

$$