fzus63 kmqt 100301
glfls 
expires:202511100900;;150526

open lake forecast for lake superior
national weather service marquette mi
1001 pm est sun nov 9 2025

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...

30.3 inch ridging remains over lake superior this evening, with 30.7 
inch high pressure over the great plains. the ridge weakens to 29.9 
inches by monday night ahead of a 29.4 inch trough expected to move 
across the lake tuesday night into wednesday. by wednesday night, 
the lake will be between 30.1 inch ridging over the plains and a 
deep 28.7 inch low east of hudson bay. ridging builds to 30.1 inches 
over the lake thursday night ahead of a 29.2 inch low moving 
southeast out of the northern rockies.



lsz162-100900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm est sun nov 9 2025 /901 pm cst sun nov 9 2025/

.rest of tonight...north winds 20 to 30 knots diminishing to
15 to 25 knots by midnight. isolated snow showers. waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet. 
.monday...north winds 15 to 25 knots becoming northwest 10 to
20 knots by late morning, then backing west by mid afternoon.
waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to calm to 2 feet. 
.monday night...west winds 10 to 20 knots backing southwest by
midnight, then increasing to 20 to 30 knots late. a slight chance
of snow showers after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...southwest winds 20 to 30 knots becoming west 15 to
25 knots in the afternoon. a slight chance of snow showers in the
morning. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 2 to 4 feet. 
.tuesday night...west winds 20 to 30 knots increasing to gales to
35 knots after midnight. a slight chance of rain showers. waves
building to 4 to 7 feet occasionally to 9 feet. 
.wednesday...northwest gales to 35 knots becoming west 20 to
30 knots in the afternoon. waves building to 4 to 8 feet
occasionally to 10 feet. 
.wednesday night...west winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. waves subsiding to 2 to 4 feet. 
.thursday...west winds 15 to 25 knots becoming east 5 to
15 knots. waves subsiding to calm to 2 feet. 
.friday...east winds 10 to 20 knots increasing to 15 to 25 knots.
waves building to 3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 100301
glfls 
expires:202511100900;;150527

open lake forecast for lake superior
national weather service marquette mi
1001 pm est sun nov 9 2025

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...

30.3 inch ridging remains over lake superior this evening, with 30.7 
inch high pressure over the great plains. the ridge weakens to 29.9 
inches by monday night ahead of a 29.4 inch trough expected to move 
across the lake tuesday night into wednesday. by wednesday night, 
the lake will be between 30.1 inch ridging over the plains and a 
deep 28.7 inch low east of hudson bay. ridging builds to 30.1 inches 
over the lake thursday night ahead of a 29.2 inch low moving 
southeast out of the northern rockies.



lsz263-100900-
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 est sun nov 9 2025

.rest of tonight...north winds 15 to 25 knots. isolated snow
showers. waves 3 to 6 feet occasionally to 8 feet. 
.monday...north winds 15 to 25 knots becoming northwest 5 to
15 knots by mid afternoon. isolated snow showers in the morning.
waves subsiding to 1 to 3 feet. 
.monday night...west winds 5 to 15 knots becoming southwest 10 to
20 knots by midnight, then increasing to 15 to 25 knots late.
waves subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...southwest winds 20 to 30 knots veering west in the
afternoon. a slight chance of rain and snow showers. waves
building to 4 to 8 feet occasionally to 10 feet. 
.tuesday night...west winds 20 to 30 knots increasing to gales to
35 knots after midnight. a slight chance of rain showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
7 to 10 feet occasionally to 13 feet. 
.wednesday...northwest gales to 35 knots. waves building to 8 to
11 feet occasionally to 14 feet. 
.wednesday night...west gales to 35 knots diminishing to 20 to
30 knots after midnight. waves subsiding to 5 to 8 feet
occasionally to 10 feet. 
.thursday...west winds 20 to 30 knots becoming northwest 10 to
20 knots. waves subsiding to calm to 2 feet. 
.friday...east winds 15 to 25 knots becoming southeast 20 to
30 knots. waves building to 5 to 8 feet occasionally to 10 feet. 

$$