fzus63 kmqt 050201
glfls 
expires:202610050800;;547748

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sun oct 4 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 29.5 inch low shifts into northern quebec tonight. it will be 
followed by a 30.3 inch high pressure shifting east into the great 
lakes tomorrow while strengthening to 30.2 inches. a 29.5 inch low 
then drops southeast out of northern canada, reaching northern 
ontario at 29.5 inches by tuesday evening. this brings 29.6 inch 
troughing over lake superior on tuesday, weakening to 29.7 inches 
through wednesday. high pressure builds back in from the canadian 
prairie and northern plains late in the week, resulting in 30.1 inch 
ridging over lake superior late thursday into friday.




lsz162-050800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt sun oct 4 2026 /901 pm cdt sun oct 4 2026/

.rest of tonight...northwest winds 10 to 20 knots diminishing to
5 to 15 knots late. waves 1 to 3 feet subsiding to calm to
2 feet. 
.monday...north winds 5 to 15 knots veering south in the
afternoon, then backing southeast late. waves calm to 2 feet. 
.monday night...southeast winds 10 to 20 knots veering south
late. a slight chance of showers. waves building to 2 to 4 feet. 
.tuesday...southwest winds 10 to 20 knots becoming west 15 to
25 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.tuesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 15 to 25 knots. waves building to 1 to
3 feet. 
.wednesday night...west winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.thursday...west winds 10 to 20 knots. waves calm to 2 feet. 
.friday...west winds 10 to 20 knots backing east. waves building
to 1 to 3 feet. 

$$

fzus63 kmqt 050201
glfls 
expires:202610050800;;547749

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sun oct 4 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 29.5 inch low shifts into northern quebec tonight. it will be 
followed by a 30.3 inch high pressure shifting east into the great 
lakes tomorrow while strengthening to 30.2 inches. a 29.5 inch low 
then drops southeast out of northern canada, reaching northern 
ontario at 29.5 inches by tuesday evening. this brings 29.6 inch 
troughing over lake superior on tuesday, weakening to 29.7 inches 
through wednesday. high pressure builds back in from the canadian 
prairie and northern plains late in the week, resulting in 30.1 inch 
ridging over lake superior late thursday into friday.




lsz263-050800-
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 sun oct 4 2026

.rest of tonight...northwest winds 15 to 25 knots diminishing to
10 to 20 knots late. sprinkles by midnight. waves 3 to 5 feet
occasionally to 7 feet subsiding to 2 to 4 feet. 
.monday...north winds 5 to 15 knots backing northwest in the
afternoon, then backing south late. waves subsiding to calm to
2 feet. 
.monday night...southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then becoming south 15 to 25 knots late.
a slight chance of showers. waves building to 2 to 4 feet. 
.tuesday...south winds 15 to 25 knots veering west by mid
afternoon. a slight chance of showers through early afternoon.
waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet. 
.tuesday night...west winds 15 to 25 knots. waves 2 to 4 feet. 
.wednesday...west winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.wednesday night...northwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. waves subsiding to 2 to 4 feet. 
.thursday...west winds 15 to 25 knots becoming northwest 10 to
20 knots. waves subsiding to calm to 2 feet. 
.friday...west winds 10 to 20 knots backing southeast. waves
building to 1 to 3 feet. 

$$