fzus63 kmqt 040811 cca
glfls 
expires:202610042000;;508348

open lake forecast for lake superior...corrected
national weather service marquette mi
411 am edt sun oct 4 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 29.8 inch low lifting off of lake superior's north shore this 
morning is progressively being replaced by 30.3 inch high pressure 
over the northern plains the rest of today through monday. after 
this high pressure ridging moves through late on monday, another 
clipper low phases with a low from northern canada that digs 
southeast towards the lake on tuesday. this phased low is expected 
to bring 29.6 inch troughing to the lake tuesday through tuesday 
night. remnant troughing of 29.9 inches remains over lake superior 
through thursday prior to surface ridging of 30.2 inches moving in 
again on friday.


lsz162-042000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
411 am edt sun oct 4 2026 /311 am cdt sun oct 4 2026/

.early this morning...northwest winds 20 to 30 knots. waves 3 to
5 feet occasionally to 7 feet. 
.today...northwest winds 15 to 25 knots backing west late. waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
1 to 3 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots late. waves subsiding to calm to 2 feet. 
.monday...north winds 5 to 15 knots veering south in the
afternoon. waves calm to 2 feet. 
.monday night...southeast winds 10 to 20 knots veering south
after midnight. waves building to 2 to 4 feet. 
.tuesday...southwest winds 15 to 25 knots veering west by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.tuesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.thursday...west winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 040811 cca
glfls 
expires:202610042000;;508349

open lake forecast for lake superior...corrected
national weather service marquette mi
411 am edt sun oct 4 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 29.8 inch low lifting off of lake superior's north shore this 
morning is progressively being replaced by 30.3 inch high pressure 
over the northern plains the rest of today through monday. after 
this high pressure ridging moves through late on monday, another 
clipper low phases with a low from northern canada that digs 
southeast towards the lake on tuesday. this phased low is expected 
to bring 29.6 inch troughing to the lake tuesday through tuesday 
night. remnant troughing of 29.9 inches remains over lake superior 
through thursday prior to surface ridging of 30.2 inches moving in 
again on friday.


lsz263-042000-
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-
411 am edt sun oct 4 2026

.early this morning...northwest winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet building to 4 to 7 feet
occasionally to 9 feet. 
.today...northwest winds 20 to 30 knots backing west late. waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 3 to 6 feet occasionally to 8 feet. 
.tonight...northwest winds 15 to 25 knots diminishing to 10 to
20 knots late. waves subsiding to 2 to 4 feet. 
.monday...north winds 5 to 15 knots backing northwest in the
afternoon, then backing south late. waves subsiding to calm to
2 feet. 
.monday night...southeast winds 10 to 20 knots becoming south
15 to 25 knots after midnight. waves building to 2 to 4 feet. 
.tuesday...south winds 15 to 25 knots veering southwest by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.tuesday night...west winds 15 to 25 knots. waves building to
3 to 5 feet occasionally to 7 feet. 
.wednesday...west winds 15 to 25 knots. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 1 to 3 feet. 
.thursday...west winds 10 to 20 knots. waves subsiding to calm to
2 feet. 

$$