fzus63 kmqt 232101
glfls 
expires:202511240900;;383021

open lake forecast for lake superior
national weather service marquette mi
400 pm 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 line 
south of james bay, dissipating as it tracks east through this 
evening. meanwhile, a 30.2 inch high passing south of the great 
lakes through this evening will result in a 30.0 inch ridge passing 
over the lake. in its wake, a 29.8 inch trough 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.



lsz162-240900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est sun nov 23 2025 /300 pm cst sun nov 23 2025/

.late this afternoon...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...south winds 5 to 15 knots becoming southwest 10 to
20 knots by midnight. 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...north winds 5 to 15 knots veering northeast by
midnight, then increasing to 10 to 20 knots late. a slight chance
of rain showers after midnight. 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 showers in the
morning, then rain showers 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 showers in the evening.
snow showers. waves building to 5 to 8 feet occasionally to
10 feet. 
.wednesday...north gales to 40 knots backing northwest in the
afternoon. snow showers. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 
.wednesday night...northwest gales to 35 knots diminishing to
20 to 30 knots after midnight. a chance of snow showers. waves
subsiding to 3 to 5 feet occasionally to 7 feet. 
.thursday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. waves subsiding to calm to 2 feet. 
.friday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 232101
glfls 
expires:202511240900;;383022

open lake forecast for lake superior
national weather service marquette mi
400 pm 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 line 
south of james bay, dissipating as it tracks east through this 
evening. meanwhile, a 30.2 inch high passing south of the great 
lakes through this evening will result in a 30.0 inch ridge passing 
over the lake. in its wake, a 29.8 inch trough 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.



lsz263-240900-
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-
400 pm est sun nov 23 2025

.late this afternoon...southwest winds 5 to 15 knots. waves 1 to
3 feet. 
.tonight...south winds 5 to 15 knots increasing to 10 to 20 knots
by midnight, then veering southwest late. waves subsiding to calm
to 2 feet, then building to 1 to 3 feet. 
.monday...west winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. waves building to 2 to 4 feet, then subsiding
to calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots. a slight chance of
rain showers after midnight. 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 showers in the
morning, then rain showers likely in the afternoon. waves
building to 2 to 4 feet. 
.tuesday night...northeast winds 20 to 30 knots becoming north
gales to 40 knots after midnight. rain showers in the evening.
snow showers. waves building to 8 to 11 feet occasionally to
14 feet. 
.wednesday...north gales to 45 knots backing northwest in the
afternoon. snow showers. waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 7 to 10 feet
occasionally to 13 feet. 
.wednesday night...northwest gales to 40 knots. snow showers
likely in the evening, then a chance of snow showers after
midnight. waves subsiding to 6 to 9 feet occasionally to 11 feet.
.thursday...northwest gales to 40 knots diminishing to 20 to
30 knots. a chance of snow showers. waves subsiding to 3 to
5 feet occasionally to 7 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$