fzus63 kmqt 291402
glfls 
expires:202609292000;;248519

open lake forecast for lake superior
national weather service marquette mi
1001 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 the 30.1 parent high over the lower great lakes the rest of this 
morning through early this afternoon continues east towards the 
atlantic. a deep 29.3 inch low over the northern canadian 
territories and provinces is projected to extend a 29.7 inch trough 
south through the plains today. pressure falls to 29.7 inches over 
lake superior tonight and continues to deepen to 29.6 inches on 
wednesday as the deep canadian low strengthens to 29.0 inches over 
hudson bay wednesday afternoon. 29.8 inch troughing lingers over the 
lake on thursday between this low and another 29.7 low over the 
southern plains. high pressure then builds to 30.3 inches over the 
northern plains thursday night into friday before shifting east into 
the great lakes friday night and saturday. in it's wake, a weak 30.0 
inch clipper brings 30.0 inch troughing over lake superior saturday 
night into sunday. 




lsz162-292000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt tue sep 29 2026 /901 am cdt tue sep 29 2026/

.rest of today...south winds 15 to 25 knots. showers likely by
mid afternoon. waves 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 building to
1 to 3 feet, then subsiding to 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 291402
glfls 
expires:202609292000;;248520

open lake forecast for lake superior
national weather service marquette mi
1001 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 the 30.1 parent high over the lower great lakes the rest of this 
morning through early this afternoon continues east towards the 
atlantic. a deep 29.3 inch low over the northern canadian 
territories and provinces is projected to extend a 29.7 inch trough 
south through the plains today. pressure falls to 29.7 inches over 
lake superior tonight and continues to deepen to 29.6 inches on 
wednesday as the deep canadian low strengthens to 29.0 inches over 
hudson bay wednesday afternoon. 29.8 inch troughing lingers over the 
lake on thursday between this low and another 29.7 low over the 
southern plains. high pressure then builds to 30.3 inches over the 
northern plains thursday night into friday before shifting east into 
the great lakes friday night and saturday. in it's wake, a weak 30.0 
inch clipper brings 30.0 inch troughing over lake superior saturday 
night into sunday. 




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-
1001 am edt tue sep 29 2026

.rest of today...south winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. a chance of showers by mid afternoon.
waves 2 to 4 feet 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. 

$$