fzus63 kmqt 290801
glfls 
expires:202609292000;;235419

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue sep 29 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...

ridging has weakened to 29.9 inches over lake superior this morning 
as 30.0 high pressure shifts east of the lake and extends from 
southern quebec to lower michigan. deep troughing of 29.3 inches is 
lifting out of the canadian rockies, with a 29.7 inch trough 
extending south through the plains. pressure will fall to 29.7 
inches over lake superior tonight and continue to deepen to 29.6 
inches on wednesday as the canadian trough strengthens into a 29.0 
inch low over hudson bay wednesday afternoon. 29.8 inch troughing 
lingers over the lake on thursday between this low and another 29.6 
low over the south plains. high pressure then builds to 30.3 inches 
over the northern plains thursday night into friday and shifts east 
to the great lakes friday night and saturday.




lsz162-292000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt tue sep 29 2026 /301 am cdt tue sep 29 2026/

.early this morning...south winds 5 to 15 knots. waves calm to
2 feet. 
.today...south winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. showers likely by mid afternoon. waves building
to 1 to 3 feet. 
.tonight...south winds 15 to 25 knots becoming southwest 10 to
20 knots after midnight. a chance of showers through midnight.
waves subsiding to calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots. waves calm to
2 feet. 
.wednesday night...southwest winds 10 to 20 knots veering
northwest after midnight. waves calm to 2 feet. 
.thursday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.friday...west winds 5 to 15 knots backing south. waves calm to
2 feet. 
.saturday...south winds 5 to 15 knots becoming west 15 to
25 knots. a chance of showers. waves building to 1 to 3 feet. 

$$

fzus63 kmqt 290801
glfls 
expires:202609292000;;235420

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue sep 29 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...

ridging has weakened to 29.9 inches over lake superior this morning 
as 30.0 high pressure shifts east of the lake and extends from 
southern quebec to lower michigan. deep troughing of 29.3 inches is 
lifting out of the canadian rockies, with a 29.7 inch trough 
extending south through the plains. pressure will fall to 29.7 
inches over lake superior tonight and continue to deepen to 29.6 
inches on wednesday as the canadian trough strengthens into a 29.0 
inch low over hudson bay wednesday afternoon. 29.8 inch troughing 
lingers over the lake on thursday between this low and another 29.6 
low over the south plains. high pressure then builds to 30.3 inches 
over the northern plains thursday night into friday and shifts east 
to the great lakes friday night and saturday.




lsz263-292000-
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-
401 am edt tue sep 29 2026

.early this morning...south winds 10 to 20 knots. waves calm to
2 feet building to 1 to 3 feet. 
.today...south winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. a chance of showers by mid afternoon. waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.tonight...southwest winds 15 to 25 knots diminishing to 10 to
20 knots late. showers likely through midnight, then a slight
chance of showers after midnight. waves building to 2 to 4 feet,
then subsiding to calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots increasing to 15 to
25 knots in the afternoon. waves building to 1 to 3 feet. 
.wednesday night...southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. waves subsiding to calm to 2 feet,
then building to 1 to 3 feet. 
.thursday...west winds 15 to 25 knots. waves building to 2 to
4 feet. 
.thursday night...northwest winds 10 to 20 knots. waves subsiding
to 1 to 3 feet. 
.friday...west winds 5 to 15 knots backing south. waves subsiding
to calm to 2 feet. 
.saturday...south winds 10 to 20 knots becoming west 15 to
25 knots. a chance of showers. waves building to 3 to 5 feet
occasionally to 7 feet. 

$$