fzus63 kmqt 300201
glfls 
expires:202609300800;;276142

open lake forecast for lake superior
national weather service marquette mi
1001 pm 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...

a 29.2 inch low over northern manitoba moves to hudson bay, 
deepening to 29.1 inches for wednesday morning. pressure falls to 
29.7 inches over lake superior tonight and could deepen to 29.6 
inches on wednesday as the deep canadian low strengthens to 29.0 
inches 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 moves over lake superior saturday night and sunday, 
with 30.3 inch ridging returning sunday night and monday. 




lsz162-300800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt tue sep 29 2026 /901 pm cdt tue sep 29 2026/

.rest of tonight...south winds 15 to 25 knots becoming southwest
10 to 20 knots after midnight. a chance of showers by midnight.
waves 2 to 4 feet 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 west
after midnight. waves calm to 2 feet. 
.thursday...west winds 10 to 20 knots. waves calm to 2 feet. 
.thursday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.friday...northwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots becoming southwest less
than 10 knots after midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots becoming west 10 to
20 knots. a chance of showers. waves calm to 2 feet. 
.sunday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 300201
glfls 
expires:202609300800;;276143

open lake forecast for lake superior
national weather service marquette mi
1001 pm 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...

a 29.2 inch low over northern manitoba moves to hudson bay, 
deepening to 29.1 inches for wednesday morning. pressure falls to 
29.7 inches over lake superior tonight and could deepen to 29.6 
inches on wednesday as the deep canadian low strengthens to 29.0 
inches 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 moves over lake superior saturday night and sunday, 
with 30.3 inch ridging returning sunday night and monday. 




lsz263-300800-
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 pm edt tue sep 29 2026

.rest of tonight...south winds 15 to 25 knots veering southwest
after midnight, then diminishing to 10 to 20 knots late. a chance
of showers by midnight. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.wednesday...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.wednesday night...southwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight, then veering west late. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.thursday...west winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves subsiding to calm to 2 feet,
then building to 1 to 3 feet. 
.thursday night...northwest winds 10 to 20 knots. waves building
to 2 to 4 feet. 
.friday...northwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.friday night...west winds 5 to 15 knots backing southwest after
midnight. waves calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots becoming west 15 to
25 knots. a chance of showers. waves building to 2 to 4 feet. 
.sunday...northwest winds 15 to 25 knots. waves subsiding to 1 to
3 feet. 

$$