fzus63 kmqt 231401
glfls 
expires:202510232000;;624062

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu oct 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...

30.1 inch ridging gradually builds into the great lakes, reducing 
troughing over the lake until 30.2 inch ridging spans most of the 
upper great lakes friday as a 30.3 inch high slides southeast 
through wisconsin. by saturday, this high builds to 30.4 inches over 
northeastern ontario then to 30.5 inches late sunday over northern 
quebec. this high remains parked over northern quebec through 
tuesday. meanwhile, a 29.9 inch low lifts through the northern 
plains tuesday morning.



lsz162-232000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt thu oct 23 2025 /901 am cdt thu oct 23 2025/

.rest of today...northwest winds 15 to 25 knots diminishing to
10 to 20 knots late. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...north winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then backing northwest late. waves
subsiding to calm to 2 feet. 
.friday...northwest winds 5 to 15 knots backing southwest late.
waves calm to 2 feet. 
.friday night...south winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...south winds 10 to 20 knots. waves calm to 2 feet. 
.saturday night...south winds 10 to 20 knots. waves calm to
2 feet. 
.sunday...southeast winds 10 to 20 knots. waves building to 1 to
3 feet. 
.monday...southeast winds 10 to 20 knots increasing to 15 to
25 knots. a chance of showers. waves building to 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 231401
glfls 
expires:202510232000;;624063

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu oct 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...

30.1 inch ridging gradually builds into the great lakes, reducing 
troughing over the lake until 30.2 inch ridging spans most of the 
upper great lakes friday as a 30.3 inch high slides southeast 
through wisconsin. by saturday, this high builds to 30.4 inches over 
northeastern ontario then to 30.5 inches late sunday over northern 
quebec. this high remains parked over northern quebec through 
tuesday. meanwhile, a 29.9 inch low lifts through the northern 
plains tuesday morning.



lsz263-232000-
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 am edt thu oct 23 2025

.rest of today...north winds 15 to 25 knots backing northwest in
the afternoon, then diminishing to 10 to 20 knots late. isolated
rain showers by late morning. waves 3 to 6 feet occasionally to
8 feet subsiding to 2 to 4 feet. 
.tonight...north winds 10 to 20 knots diminishing to 5 to
15 knots late. waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 1 to 3 feet. 
.friday...northwest winds 5 to 15 knots backing west late. waves
subsiding to calm to 2 feet. 
.friday night...south winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots. waves calm to 2 feet. 
.saturday night...south winds 10 to 20 knots. waves calm to
2 feet. 
.sunday...south winds 5 to 15 knots becoming southeast 10 to
20 knots. waves building to 1 to 3 feet. 
.monday...southeast winds 15 to 25 knots. a chance of showers.
waves building to 3 to 6 feet occasionally to 8 feet. 

$$