fzus63 kmqt 082002
glfls 
expires:202610090800;;754811

open lake forecast for lake superior
national weather service marquette mi
401 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...

ridging continues to build to 30.0 inches inches tonight as the 30.1 
inch parent high digs from the northern plains into the mid-
atlantic. a 29.2 inch clipper over southern alberta on friday night 
splits and creates a 29.5 inch low over the northern plains and 
canadian prairies by saturday. this low is expected to bring a 
gradient of 29.7 to 30.1 inch troughing back over lake superior on 
saturday, which flattens out to around 29.8 inch troughing by sunday 
evening as the low weakens to 29.7 inches near lake winnipeg by the 
end of the weekend. a subtle 29.7 inch shortwave low moves over the 
lake sunday night and remains through monday evening. an area of 
high pressure builds over the northern plains monday night into 
tuesday morning and is expected to move into the area tuesday 
afternoon, building to 30.2 inches by wednesday morning.




lsz162-090800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu oct 8 2026 /301 pm cdt thu oct 8 2026/

.late this afternoon...west winds 15 to 25 knots. waves calm to
2 feet. 
.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 1 to 3 feet. 
.friday night...east winds 15 to 25 knots veering southeast after
midnight. 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 becoming south 15 to
25 knots by mid afternoon. waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet. 
.saturday night...south winds 20 to 30 knots becoming southwest
15 to 25 knots 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...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. 

$$

fzus63 kmqt 082002
glfls 
expires:202610090800;;754812

open lake forecast for lake superior
national weather service marquette mi
401 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...

ridging continues to build to 30.0 inches inches tonight as the 30.1 
inch parent high digs from the northern plains into the mid-
atlantic. a 29.2 inch clipper over southern alberta on friday night 
splits and creates a 29.5 inch low over the northern plains and 
canadian prairies by saturday. this low is expected to bring a 
gradient of 29.7 to 30.1 inch troughing back over lake superior on 
saturday, which flattens out to around 29.8 inch troughing by sunday 
evening as the low weakens to 29.7 inches near lake winnipeg by the 
end of the weekend. a subtle 29.7 inch shortwave low moves over the 
lake sunday night and remains through monday evening. an area of 
high pressure builds over the northern plains monday night into 
tuesday morning and is expected to move into the area tuesday 
afternoon, building to 30.2 inches by wednesday morning.




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-
401 pm edt thu oct 8 2026

.late this afternoon...west winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet. 
.tonight...west winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight. waves 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 5 feet occasionally to 7 feet. 
.saturday...southeast winds 15 to 25 knots veering south by mid
afternoon. waves subsiding to 2 to 4 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 1 to 3 feet. 
.sunday night...south winds 15 to 25 knots backing north after
midnight. a chance of showers. waves 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. 

$$