fzus63 kmqt 222143
glfls 
expires:202610230545;;015532

open lake forecast for lake superior
national weather service marquette mi
543 pm edt thu oct 22 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 30.3 inch high pressure over quebec, extending a 30.2 inch ridge 
over lake superior, will build to 30.5 inches through friday night. 
by saturday afternoon, the high shifts southeast into new england as 
a 29.6 inch low lifts north of lake winnipeg into northern manitoba, 
strengthening to 29.2 inches by saturday evening. the low then lifts 
northeast to the hudson bay saturday night through sunday as it 
drags a 30.2 inch trough across lake superior. high pressure of at 
least 30.6 inches over the canadian prairies on monday pushes 
ridging of at least 30.4 inches over the upper great lakes early 
next week.


lsz162-230545-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
543 pm edt thu oct 22 2026 /443 pm cdt thu oct 22 2026/

...dense fog advisory in effect until 11 am edt /10 am cdt/
friday...

.late this afternoon...east winds 5 to 15 knots. patchy dense
fog. waves calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots veering east late. areas
of dense fog. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots. patchy dense fog. waves calm
to 2 feet. 
.friday night...east winds 5 to 15 knots veering south after
midnight, then increasing to 10 to 20 knots late. patchy fog
through midnight. waves building to 1 to 3 feet. 
.saturday...south winds 15 to 25 knots veering southwest by mid
afternoon. a chance of showers. waves building to 2 to 4 feet. 
.saturday night...west winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.sunday...west winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.sunday night...northwest winds 10 to 20 knots veering north
after midnight. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots veering east. waves calm
to 2 feet. 
.tuesday...east winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 222143
glfls 
expires:202610230545;;015533

open lake forecast for lake superior
national weather service marquette mi
543 pm edt thu oct 22 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 30.3 inch high pressure over quebec, extending a 30.2 inch ridge 
over lake superior, will build to 30.5 inches through friday night. 
by saturday afternoon, the high shifts southeast into new england as 
a 29.6 inch low lifts north of lake winnipeg into northern manitoba, 
strengthening to 29.2 inches by saturday evening. the low then lifts 
northeast to the hudson bay saturday night through sunday as it 
drags a 30.2 inch trough across lake superior. high pressure of at 
least 30.6 inches over the canadian prairies on monday pushes 
ridging of at least 30.4 inches over the upper great lakes early 
next week.


lsz263-230545-
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-
543 pm edt thu oct 22 2026

...dense fog advisory in effect until 11 am edt friday...

.late this afternoon...east winds 5 to 15 knots. patchy dense
fog. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots veering south late. patchy
dense fog. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming east 5 to 15 knots late.
patchy dense fog. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. waves building to 2 to 4 feet. 
.saturday...south winds 15 to 25 knots. a slight chance of
showers by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.saturday night...southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.sunday...west winds 10 to 20 knots. waves building to 2 to
4 feet. 
.sunday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...north winds 5 to 15 knots veering northeast. waves
subsiding to calm to 2 feet. 
.tuesday...east winds 5 to 15 knots veering south. waves calm to
2 feet. 

$$