fzus63 kmqt 051401
glfls 
expires:202610052000;;574693

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon oct 5 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 will move over the great lakes today. behind 
this, a 29.5 inch low drops southeast out of northern canada, 
reaching far northern ontario at 29.5 inches by tuesday evening. 
this brings 29.6 inch troughing over lake superior late on tuesday, 
weakening to 29.7 inches through wednesday. high pressure builds 
back in from the canadian prairies and northern plains late in the 
week, resulting in 30.1 inch ridging over lake superior late 
thursday into friday. a 29.4 inch low will develop off the northern 
rockies late friday and extend a 29.7 to 29.9 inch trough to the 
upper great lakes by saturday night.




lsz162-052000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt mon oct 5 2026 /901 am cdt mon oct 5 2026/

.rest of today...north winds 5 to 15 knots veering south in the
afternoon. waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots veering south late. a
chance of showers. waves building to 1 to 3 feet. 
.tuesday...south winds 10 to 20 knots becoming southwest 15 to
25 knots in the afternoon, then veering west late. waves building
to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.tuesday night...west winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.wednesday...west winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.wednesday night...west winds 10 to 20 knots. waves subsiding to
calm to 2 feet, then building to 1 to 3 feet. 
.thursday...west winds 10 to 20 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots becoming east 10 to 20 knots.
waves building to 1 to 3 feet. 

$$

fzus63 kmqt 051401
glfls 
expires:202610052000;;574694

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon oct 5 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 will move over the great lakes today. behind 
this, a 29.5 inch low drops southeast out of northern canada, 
reaching far northern ontario at 29.5 inches by tuesday evening. 
this brings 29.6 inch troughing over lake superior late on tuesday, 
weakening to 29.7 inches through wednesday. high pressure builds 
back in from the canadian prairies and northern plains late in the 
week, resulting in 30.1 inch ridging over lake superior late 
thursday into friday. a 29.4 inch low will develop off the northern 
rockies late friday and extend a 29.7 to 29.9 inch trough to the 
upper great lakes by saturday night.




lsz263-052000-
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 mon oct 5 2026

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

$$