fzus63 kmqt 070201
glfls 
expires:202610070800;;656297

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue oct 6 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...

troughing weakens to 29.7 inches tonight as the associated low 
tracks eastward across northeast ontario, persisting through 
tomorrow. high pressure then builds in from the canadian prairies 
and northern plains late in the work week, with 30.0 inch ridging 
over lake superior on thursday strengthening to 30.1 inches on 
friday. a 29.4 inch clipper low then develops off the northern 
rockies late friday and extends a 29.6 to 29.8 inch trough into the 
upper great lakes by saturday.




lsz162-070800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt tue oct 6 2026 /901 pm cdt tue oct 6 2026/

.rest of tonight...west winds 10 to 20 knots. waves 1 to 3 feet
subsiding to calm to 2 feet. 
.wednesday...west winds 10 to 20 knots increasing to 20 to
30 knots in the afternoon. a slight chance of showers by mid
afternoon. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.wednesday night...west winds 15 to 25 knots veering northwest
after midnight. waves subsiding to calm to 2 feet, then building
to 1 to 3 feet. 
.thursday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.thursday night...west winds 5 to 15 knots. waves calm to 2 feet.
.friday...southwest winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.friday night...east winds 10 to 20 knots veering southeast after
midnight. waves building to 1 to 3 feet. 
.saturday...south winds 20 to 30 knots becoming southwest gales
to 35 knots. waves building to 3 to 5 feet occasionally to
7 feet. 
.sunday...west winds 15 to 25 knots veering northeast. a chance
of showers. waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 070201
glfls 
expires:202610070800;;656298

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue oct 6 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...

troughing weakens to 29.7 inches tonight as the associated low 
tracks eastward across northeast ontario, persisting through 
tomorrow. high pressure then builds in from the canadian prairies 
and northern plains late in the work week, with 30.0 inch ridging 
over lake superior on thursday strengthening to 30.1 inches on 
friday. a 29.4 inch clipper low then develops off the northern 
rockies late friday and extends a 29.6 to 29.8 inch trough into the 
upper great lakes by saturday.




lsz263-070800-
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 oct 6 2026

.rest of tonight...west winds 10 to 20 knots. waves 1 to 3 feet
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.wednesday...west winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. a slight chance of showers. waves
building to 3 to 6 feet occasionally to 8 feet. 
.wednesday night...northwest winds 15 to 25 knots. a slight
chance of showers through midnight. waves 3 to 5 feet
occasionally to 7 feet. 
.thursday...northwest winds 15 to 25 knots backing west by mid
afternoon. waves subsiding to 2 to 4 feet. 
.thursday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.friday night...southeast winds 10 to 20 knots. waves building to
1 to 3 feet. 
.saturday...south winds 20 to 30 knots becoming southwest gales
to 35 knots. waves building to 3 to 6 feet occasionally to
8 feet. 
.sunday...west winds 20 to 30 knots becoming northeast 15 to
25 knots. a chance of showers. waves subsiding to 2 to 4 feet,
then building to 3 to 6 feet occasionally to 8 feet. 

$$