fzus63 kmqt 031419
glfls 
expires:202610032230;;466388

open lake forecast for lake superior
national weather service marquette mi
1019 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 and tomorrow, sending elevated northwesterly surface winds 
across lake superior tomorrow afternoon and evening. 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 
29.9 inches remains over lake superior through thursday.




lsz162-032230-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1019 am edt sat oct 3 2026 /919 am cdt sat oct 3 2026/

.rest of today...south winds 10 to 20 knots increasing to 15 to
25 knots late. a slight chance of showers by late morning, then
rain likely by mid afternoon. waves calm to 2 feet 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 1 to 3 feet. 
.sunday night...northwest winds 10 to 20 knots. waves subsiding
to 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 building to 1 to
3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 031419
glfls 
expires:202610032230;;466389

open lake forecast for lake superior
national weather service marquette mi
1019 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 and tomorrow, sending elevated northwesterly surface winds 
across lake superior tomorrow afternoon and evening. 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 
29.9 inches remains over lake superior through thursday.




lsz263-032230-
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-
1019 am edt sat oct 3 2026

.rest of 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 calm to 2 feet 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 building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 1 to 3 feet. 

$$