fzus63 kmqt 080201
glfls 
expires:202610080800;;710194

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed oct 7 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...

lake superior is currently between 29.4 inch low pressure over 
northwest quebec and 30.1 inch high pressure over northwest north 
dakota. little motion is expected with the low pressure by midday 
thursday as the high pressure elongates southeast to illinois. by 
thursday night, the low will weaken to 29.6 inches over much of 
quebec as the 30.1 inch high shifts to the virginias. friday, the 
high will build to 30.2 inches just south of the lower great lakes, 
with the ridging north of the high separating a pair of 29.4 inch 
lows over southern alberta and labrador respectively. late friday 
through saturday, the western low will move to the dakotas as the 
high builds to 30.4 inches over new england. eventual hurricane 
isaias will move up the mississippi river valley at 29.8 inches by 
early sunday, helping kick the high pressure off the east coast as 
the western low weakens to 29.6 inches over the northern plains. 
sunday night, the low will fragment into a pair of 29.7 inch lows 
over the central plains and over quebec respectively, with the 
weaker troughing between the lows passing over the lake through 
monday. tuesday, the southern low moves through the great lakes at 
29.6 inches.




lsz162-080800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt wed oct 7 2026 /900 pm cdt wed oct 7 2026/

.rest of tonight...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves calm to 2 feet building to 1 to
3 feet. 
.thursday...west winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. waves subsiding to calm to 2 feet. 
.thursday night...west winds 5 to 15 knots. waves calm to 2 feet.
.friday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.friday night...east winds 10 to 20 knots. waves building to 1 to
3 feet. 
.saturday...southeast winds 20 to 30 knots becoming south gales
to 35 knots by mid afternoon. waves building to 2 to 4 feet. 
.saturday night...southwest gales to 35 knots. waves building to
3 to 6 feet occasionally to 8 feet. 
.sunday...southwest winds 15 to 25 knots veering north. a chance
of showers. waves subsiding to 1 to 3 feet, then building to 2 to
4 feet. 
.monday...northeast winds 15 to 25 knots backing north. a chance
of rain showers. waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 080201
glfls 
expires:202610080800;;710195

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed oct 7 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...

lake superior is currently between 29.4 inch low pressure over 
northwest quebec and 30.1 inch high pressure over northwest north 
dakota. little motion is expected with the low pressure by midday 
thursday as the high pressure elongates southeast to illinois. by 
thursday night, the low will weaken to 29.6 inches over much of 
quebec as the 30.1 inch high shifts to the virginias. friday, the 
high will build to 30.2 inches just south of the lower great lakes, 
with the ridging north of the high separating a pair of 29.4 inch 
lows over southern alberta and labrador respectively. late friday 
through saturday, the western low will move to the dakotas as the 
high builds to 30.4 inches over new england. eventual hurricane 
isaias will move up the mississippi river valley at 29.8 inches by 
early sunday, helping kick the high pressure off the east coast as 
the western low weakens to 29.6 inches over the northern plains. 
sunday night, the low will fragment into a pair of 29.7 inch lows 
over the central plains and over quebec respectively, with the 
weaker troughing between the lows passing over the lake through 
monday. tuesday, the southern low moves through the great lakes at 
29.6 inches.




lsz263-080800-
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 wed oct 7 2026

.rest of tonight...northwest winds 10 to 20 knots becoming west
15 to 25 knots late. waves 2 to 4 feet building to 3 to 5 feet
occasionally to 7 feet. 
.thursday...west winds 15 to 25 knots. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.thursday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.friday night...southeast winds 15 to 25 knots. waves building to
1 to 3 feet. 
.saturday...southeast winds 20 to 30 knots becoming south gales
to 35 knots by mid afternoon. waves building to 2 to 4 feet. 
.saturday night...south gales to 40 knots becoming southwest
gales to 35 knots after midnight. waves building to 4 to 8 feet
occasionally to 10 feet. 
.sunday...southwest winds 20 to 30 knots becoming north 15 to
25 knots. a chance of showers. waves subsiding to 2 to 4 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.monday...north winds 15 to 25 knots increasing to 20 to
30 knots. a chance of rain showers. waves building to 3 to 6 feet
occasionally to 8 feet. 

$$