fzus63 kmqt 231500
glfls 
expires:202511232100;;368114

open lake forecast for lake superior
national weather service marquette mi
1000 am est sun nov 23 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...

a 29.8 inch trough currently resides on the quebec/ontario lines 
south of james bay, dissipating as it tracks east today. meanwhile, 
a 30.2 inch high passing south of the great lakes today will result 
in a 30.0 inch ridge passing over the lake today. in its wake, a 
29.8 inch truogh will pass just north of lake superior tonight 
through monday. monday night into tuesday, a 29.8 inch low will 
organize just west of the great lakes, deepening to 29.6 inches 
tuesday night over the michigan upper peninsula and passing over 
eastern lake superior at 29.4 inches wednesday. this low deepens 
further to 29.3 inches over quebec thursday while 30.5 inch high 
pressure builds over the northern great plains. this high moves over 
lake superior friday into the weekend.



lsz162-232100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est sun nov 23 2025 /900 am cst sun nov 23 2025/

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

$$

fzus63 kmqt 231500
glfls 
expires:202511232100;;368115

open lake forecast for lake superior
national weather service marquette mi
1000 am est sun nov 23 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...

a 29.8 inch trough currently resides on the quebec/ontario lines 
south of james bay, dissipating as it tracks east today. meanwhile, 
a 30.2 inch high passing south of the great lakes today will result 
in a 30.0 inch ridge passing over the lake today. in its wake, a 
29.8 inch truogh will pass just north of lake superior tonight 
through monday. monday night into tuesday, a 29.8 inch low will 
organize just west of the great lakes, deepening to 29.6 inches 
tuesday night over the michigan upper peninsula and passing over 
eastern lake superior at 29.4 inches wednesday. this low deepens 
further to 29.3 inches over quebec thursday while 30.5 inch high 
pressure builds over the northern great plains. this high moves over 
lake superior friday into the weekend.



lsz263-232100-
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 am est sun nov 23 2025

.rest of today...northwest winds 10 to 20 knots backing west by
late morning, then becoming southwest 5 to 15 knots by mid
afternoon. waves 3 to 5 feet occasionally to 7 feet subsiding to
1 to 3 feet. 
.tonight...south winds 5 to 15 knots becoming southwest 10 to
20 knots late. waves subsiding to calm to 2 feet, then building
to 2 to 4 feet. 
.monday...southwest winds 10 to 20 knots veering west by late
morning, then diminishing to 5 to 15 knots by mid afternoon.
waves subsiding to calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots. a slight chance of
rain. waves calm to 2 feet. 
.tuesday...northeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. a chance of rain in the morning, then
rain likely in the afternoon. waves building to 2 to 4 feet. 
.tuesday night...northeast winds 20 to 30 knots becoming north
gales to 35 knots after midnight. rain and snow. waves building
to 8 to 11 feet occasionally to 14 feet. 
.wednesday...north gales to 40 knots becoming northwest gales to
35 knots. snow showers likely, then a chance of snow showers.
waves building to 9 to 12 feet occasionally to 15 feet, then
subsiding to 6 to 9 feet occasionally to 11 feet. 
.thursday...northwest gales to 35 knots diminishing to 20 to
30 knots. a chance of snow showers. waves subsiding to 3 to
5 feet occasionally to 7 feet. 

$$