fzus63 kmqt 201401
glfls 
expires:202609202000;;766961

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun sep 20 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...

today and monday, a 30.2 inch high over manitoba builds to 30.4 
inches as it moves over ontario. this high pressure center slowly 
builds to 30.5 inches as it shifts into quebec by midday tuesday, 
trailing a 30.4 inch ridge over lake superior. the high builds 
further to 30.6 inches wednesday as it progresses eastward. the 
high, still over southern quebec, weakens to 30.4 inches thursday. 
by late friday, the high weakens to 30.3 inches over the eastern 
great lakes basin as 29.5 inch low pressure develops over montana.




lsz162-202000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt sun sep 20 2026 /901 am cdt sun sep 20 2026/

.rest of today...northeast winds 20 to 30 knots becoming east
15 to 25 knots late. waves 3 to 6 feet occasionally to 8 feet. 
.tonight...east winds 10 to 20 knots. waves subsiding to 1 to
3 feet. 
.monday...east winds 10 to 20 knots. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 
.monday night...east winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.tuesday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves building to 1 to 3 feet. 
.tuesday night...east winds 10 to 20 knots becoming southeast
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...east winds 10 to 20 knots. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing east. waves calm to
2 feet. 

$$

fzus63 kmqt 201401
glfls 
expires:202609202000;;766962

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun sep 20 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...

today and monday, a 30.2 inch high over manitoba builds to 30.4 
inches as it moves over ontario. this high pressure center slowly 
builds to 30.5 inches as it shifts into quebec by midday tuesday, 
trailing a 30.4 inch ridge over lake superior. the high builds 
further to 30.6 inches wednesday as it progresses eastward. the 
high, still over southern quebec, weakens to 30.4 inches thursday. 
by late friday, the high weakens to 30.3 inches over the eastern 
great lakes basin as 29.5 inch low pressure develops over montana.




lsz263-202000-
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 sun sep 20 2026

.rest of today...northeast winds 15 to 25 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...northeast winds 10 to 20 knots becoming east 5 to
15 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...east winds 5 to 15 knots increasing to 10 to 20 knots
late. waves subsiding to calm to 2 feet, then building to 1 to
3 feet. 
.monday night...east winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.tuesday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves calm to 2 feet. 
.tuesday night...east winds 10 to 20 knots becoming southeast
5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots veering south. waves
calm to 2 feet. 
.thursday...south winds 5 to 15 knots. waves calm to 2 feet. 

$$