fzus63 kmqt 032003
glfls 
expires:202610040800;;479929

open lake forecast for lake superior
national weather service marquette mi
402 pm 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 centered over lake huron this afternoon 
shifts east to the mouth of the st. lawrence river by this evening. 
immediately behind, a 29.8 inch clipper approaching northern 
minnesota this afternoon skirts along lake superior's north shore 
tonight and tomorrow, sending elevated southerly winds across lake 
superior this evening, followed by elevated northwesterlies tomorrow 
behind the front. behind the clipper, 30.3 inch high pressure 
quickly returns to the northern plains on sunday and moves overhead 
on monday. after this high pressure ridging, another 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 
prior to surface ridging moving in again on friday.




lsz162-040800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
402 pm edt sat oct 3 2026 /302 pm cdt sat oct 3 2026/

.late this afternoon...south winds 15 to 25 knots. showers
likely. waves calm to 2 feet building to 1 to 3 feet. 
.tonight...southwest winds 20 to 30 knots becoming west 15 to
25 knots after midnight, then becoming northwest 20 to 30 knots
late. showers likely through midnight. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.sunday...northwest winds 20 to 30 knots backing west in the
afternoon, then becoming northwest 15 to 25 knots late. waves
subsiding to 1 to 3 feet. 
.sunday night...northwest winds 15 to 25 knots diminishing to
5 to 15 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...southeast winds 10 to 20 knots veering south
after midnight. waves building to 2 to 4 feet. 
.tuesday...southwest winds 15 to 25 knots. waves subsiding to
1 to 3 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 veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 032003
glfls 
expires:202610040800;;479930

open lake forecast for lake superior
national weather service marquette mi
402 pm 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 centered over lake huron this afternoon 
shifts east to the mouth of the st. lawrence river by this evening. 
immediately behind, a 29.8 inch clipper approaching northern 
minnesota this afternoon skirts along lake superior's north shore 
tonight and tomorrow, sending elevated southerly winds across lake 
superior this evening, followed by elevated northwesterlies tomorrow 
behind the front. behind the clipper, 30.3 inch high pressure 
quickly returns to the northern plains on sunday and moves overhead 
on monday. after this high pressure ridging, another 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 
prior to surface ridging moving in again on friday.




lsz263-040800-
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 sat oct 3 2026

.late this afternoon...southeast winds 15 to 25 knots. showers
likely. waves calm to 2 feet building to 1 to 3 feet. 
.tonight...south winds 20 to 30 knots becoming west 15 to
25 knots after midnight, then becoming northwest 20 to 30 knots
late. showers through midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.sunday...northwest winds 20 to 30 knots becoming west 15 to
25 knots late. waves 3 to 6 feet occasionally to 8 feet. 
.sunday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots late. waves subsiding to 2 to 4 feet. 
.monday...northwest winds 5 to 15 knots backing southwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.monday night...south winds 5 to 15 knots increasing to 15 to
25 knots after midnight. waves building to 2 to 4 feet. 
.tuesday...south winds 20 to 30 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 2 to 4 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 2 to 4 feet. 
.thursday...west winds 10 to 20 knots veering northwest. waves
subsiding to 1 to 3 feet. 

$$