fzus63 kmqt 180201
glfls 
expires:202610180800;;283494

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat oct 17 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...

30.5 inch high pressure spans from new england to texas tonight 
while a 29.2 inch low moves over hudson bay, with lake superior 
around 30.0 inches through sunday between these features. high 
pressure gradually strengthens to 30.6 inches over the canadian 
maritimes through monday as 30.4 inch ridge extends southwest to the 
tennessee valley. meanwhile, 30.2 inch high pressure builds over the 
northern plains sunday night and tracks east across ontario at 30.4 
inches on monday, strengthening to 30.5 inches over quebec by 
tuesday. as this occurs, ridging over lake superior will strengthen 
from 30.1 inches sunday night to 30.4 inches monday night into 
tuesday. ridging then weakens to 30.1 inches over the lake on 
wednesday as a 29.7 inch trough crosses hudson bay.




lsz162-180800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt sat oct 17 2026 /901 pm cdt sat oct 17 2026/

...gale warning in effect through sunday afternoon...

.rest of tonight...southwest gales to 35 knots. waves 4 to 7 feet
occasionally to 9 feet building to 7 to 10 feet occasionally to
13 feet. 
.sunday...southwest gales to 35 knots diminishing to 20 to
30 knots late. waves subsiding to 4 to 7 feet occasionally to
9 feet. 
.sunday night...southwest winds 15 to 25 knots becoming west 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...northeast winds 5 to 15 knots veering east by mid
afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots backing northeast.
waves calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots veering east. waves
calm to 2 feet. 

$$

fzus63 kmqt 180201
glfls 
expires:202610180800;;283495

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat oct 17 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...

30.5 inch high pressure spans from new england to texas tonight 
while a 29.2 inch low moves over hudson bay, with lake superior 
around 30.0 inches through sunday between these features. high 
pressure gradually strengthens to 30.6 inches over the canadian 
maritimes through monday as 30.4 inch ridge extends southwest to the 
tennessee valley. meanwhile, 30.2 inch high pressure builds over the 
northern plains sunday night and tracks east across ontario at 30.4 
inches on monday, strengthening to 30.5 inches over quebec by 
tuesday. as this occurs, ridging over lake superior will strengthen 
from 30.1 inches sunday night to 30.4 inches monday night into 
tuesday. ridging then weakens to 30.1 inches over the lake on 
wednesday as a 29.7 inch trough crosses hudson bay.




lsz263-180800-
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 pm edt sat oct 17 2026

...gale warning in effect through sunday afternoon...

.rest of tonight...southwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. waves 5 to 8 feet occasionally
to 10 feet building to 8 to 11 feet occasionally to 14 feet. 
.sunday...southwest gales to 40 knots. waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.sunday night...southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight, then diminishing to 5 to 15 knots
late. waves subsiding to calm to 2 feet. 
.monday...north winds less than 10 knots becoming northeast 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots. waves calm to
2 feet. 
.wednesday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots veering southeast. waves
calm to 2 feet. 

$$