fzus63 kmqt 062002
glfls 
expires:202610070800;;643627

open lake forecast for lake superior
national weather service marquette mi
402 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...

a 29.6 inch trough spreads over lake superior this afternoon into 
this evening as a 29.4 inch low moves over far northern ontario. the 
trough will weaken to 29.7 inches over the lake through wednesday. 
high pressure 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-
402 pm edt tue oct 6 2026 /302 pm cdt tue oct 6 2026/

.late this afternoon...west winds 15 to 25 knots. waves 1 to
3 feet. 
.tonight...west winds 10 to 20 knots. waves 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. 
.wednesday night...west winds 15 to 25 knots veering northwest
after midnight. waves subsiding 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 6 feet occasionally to
8 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
6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 062002
glfls 
expires:202610070800;;643628

open lake forecast for lake superior
national weather service marquette mi
402 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...

a 29.6 inch trough spreads over lake superior this afternoon into 
this evening as a 29.4 inch low moves over far northern ontario. the 
trough will weaken to 29.7 inches over the lake through wednesday. 
high pressure 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-
402 pm edt tue oct 6 2026

.late this afternoon...west winds 10 to 20 knots. waves 1 to
3 feet. 
.tonight...west winds 10 to 20 knots. waves 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 subsiding to 2 to
4 feet, then building to 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
2 to 4 feet. 
.saturday...south winds 20 to 30 knots becoming southwest gales
to 35 knots. waves building to 4 to 7 feet occasionally to
9 feet. 
.sunday...west winds 20 to 30 knots becoming northeast 15 to
25 knots. a chance of showers. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 

$$