fzus63 kmqt 220801
glfls 
expires:202610222000;;983257

open lake forecast for lake superior
national weather service marquette mi
400 am 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...

30.3 inch high pressure becomes centered over northern ontario and 
the upper great lakes this morning. by friday afternoon, the high 
builds to 30.5 inches over southern quebec as a 29.5 inch low moves 
into eastern montana. by saturday afternoon, the high continues into 
new england as the low lifts north of lake winnipeg into northern 
manitoba, strengthening to 29.2 inches by saturday evening. the low 
then lifts northeast to 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.




lsz162-222000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt thu oct 22 2026 /300 am cdt thu oct 22 2026/

.early this morning...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.today...east winds 5 to 15 knots. patchy fog. waves calm to
2 feet. 
.tonight...northeast winds 5 to 15 knots. patchy fog. waves calm
to 2 feet. 
.friday...east winds 5 to 15 knots. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots becoming south 10 to
20 knots after midnight. a slight chance of showers. waves
building to 2 to 4 feet. 
.saturday...south winds 15 to 25 knots veering southwest by mid
afternoon. a chance of showers by mid afternoon. waves building
to 3 to 5 feet occasionally to 7 feet. 
.saturday night...west winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.sunday...west winds 5 to 15 knots veering north. waves calm to
2 feet. 
.monday...northeast winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 220801
glfls 
expires:202610222000;;983258

open lake forecast for lake superior
national weather service marquette mi
400 am 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...

30.3 inch high pressure becomes centered over northern ontario and 
the upper great lakes this morning. by friday afternoon, the high 
builds to 30.5 inches over southern quebec as a 29.5 inch low moves 
into eastern montana. by saturday afternoon, the high continues into 
new england as the low lifts north of lake winnipeg into northern 
manitoba, strengthening to 29.2 inches by saturday evening. the low 
then lifts northeast to 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.




lsz263-222000-
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 am edt thu oct 22 2026

.early this morning...east winds less than 10 knots. patchy dense
fog. waves calm to 2 feet. 
.today...east winds less than 10 knots increasing to 5 to
15 knots in the afternoon. patchy fog. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots veering south late. patchy
fog. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming southeast 5 to 15 knots
late. waves calm to 2 feet. 
.friday night...south winds 10 to 20 knots. waves building to
2 to 4 feet. 
.saturday...south winds 15 to 25 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.saturday night...southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. waves subsiding to 2 to 4 feet. 
.sunday...west winds 5 to 15 knots veering north. waves subsiding
to calm to 2 feet, then building to 1 to 3 feet. 
.monday...northeast winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 

$$