fzus63 kmqt 091401
glfls 
expires:202610092000;;796487

open lake forecast for lake superior
national weather service marquette mi
1001 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...

a 30.2 inch surface high has built over the ohio river valley this 
morning, resulting in 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 and the north 
plains. 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. 
this will create weak 29.8 inch troughing over lake superior for 
sunday, deepening to 29.7 inches by monday evening. meanwhile, the 
high will shift to the new england coastline then over the atlantic, 
ushered east by the tropical remnants at 29.9 inches as they move 
into the ohio river valley. 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-
1001 am edt fri oct 9 2026 /901 am cdt fri oct 9 2026/

.rest of today...east winds 5 to 15 knots increasing to 15 to
25 knots late. waves calm to 2 feet 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 091401
glfls 
expires:202610092000;;796488

open lake forecast for lake superior
national weather service marquette mi
1001 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...

a 30.2 inch surface high has built over the ohio river valley this 
morning, resulting in 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 and the north 
plains. 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. 
this will create weak 29.8 inch troughing over lake superior for 
sunday, deepening to 29.7 inches by monday evening. meanwhile, the 
high will shift to the new england coastline then over the atlantic, 
ushered east by the tropical remnants at 29.9 inches as they move 
into the ohio river valley. 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-
1001 am edt fri oct 9 2026

.rest of today...east winds less than 10 knots increasing to
10 to 20 knots. 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. 

$$