fzus63 kmqt 030802
glfls 
expires:202610032000;;453165

open lake forecast for lake superior
national weather service marquette mi
401 am edt sat oct 3 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...

high pressure of 30.3 inches over the mackinac straits this morning 
shifts east to the mouth of the st. lawrence river by this evening. 
in response, a 29.8 inch clipper moving through the canadian 
prairies this morning skirts along lake superior's north shore 
tonight. behind the clipper, 30.3 inch high pressure quickly returns 
to the northern plains on sunday and moves overhead on monday. 
behind this high pressure ridging, another 29.7 inch clipper low 
moves east over the canadian prairies before passing to the north of 
lake superior at 29.6 inches late tuesday and tuesday night. remnant 
troughing of 29.8 inches remains over lake superior until thursday 
morning.




lsz162-032000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt sat oct 3 2026 /301 am cdt sat oct 3 2026/

.early this morning...south winds 5 to 15 knots. waves calm to
2 feet. 
.today...south winds 5 to 15 knots increasing to 15 to 25 knots.
a slight chance of showers through early afternoon, then rain
likely by mid afternoon. waves building to 1 to 3 feet. 
.tonight...south winds 15 to 25 knots veering west after
midnight, then becoming northwest 20 to 30 knots late. a chance
of rain through midnight. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet. 
.sunday...northwest winds 15 to 25 knots backing west in the
afternoon, then veering northwest late. a slight chance of
showers by mid afternoon. waves subsiding to calm to 2 feet. 
.sunday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.monday...northwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.monday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 1 to 3 feet. 
.tuesday...southwest winds 15 to 25 knots becoming west 10 to
20 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 
.wednesday...west winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 030802
glfls 
expires:202610032000;;453166

open lake forecast for lake superior
national weather service marquette mi
401 am edt sat oct 3 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...

high pressure of 30.3 inches over the mackinac straits this morning 
shifts east to the mouth of the st. lawrence river by this evening. 
in response, a 29.8 inch clipper moving through the canadian 
prairies this morning skirts along lake superior's north shore 
tonight. behind the clipper, 30.3 inch high pressure quickly returns 
to the northern plains on sunday and moves overhead on monday. 
behind this high pressure ridging, another 29.7 inch clipper low 
moves east over the canadian prairies before passing to the north of 
lake superior at 29.6 inches late tuesday and tuesday night. remnant 
troughing of 29.8 inches remains over lake superior until thursday 
morning.




lsz263-032000-
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-
401 am edt sat oct 3 2026

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

$$