fzus63 kmqt 230204 cca
glfls 
expires:202610230800;;024566

open lake forecast for lake superior...corrected
national weather service marquette mi
1004 pm edt thu oct 22 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 30.4 inch high pressure over quebec, extending a 30.2 inch ridge 
over lake superior through the rest of the week, builds to 30.5 
inches through friday night as it drops south towards new england. 
by saturday afternoon, a 29.2 inch low over northern manitoba drags 
a 30.1 inch trough over the west half of lake superior. the trough 
remains over the lake until saturday night. high pressure of at 
least 30.6 inches over the canadian prairies on sunday and monday 
pushes ridging of at least 30.4 inches over the upper great lakes on 
sunday. the ridging intensifies to 30.6 inches monday night into 
tuesday morning as the high's center moves overhead. the high 
retreats east into new england by wednesday morning. 




lsz162-230800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1004 pm edt thu oct 22 2026 /904 pm cdt thu oct 22 2026/

...dense fog advisory in effect until 11 am edt /10 am cdt/
friday...

.rest of tonight...northeast winds 5 to 15 knots veering east
late. areas of dense fog. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots. patchy dense fog through
early afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots veering south after
midnight, then increasing to 10 to 20 knots late. patchy fog
through midnight. waves building to 1 to 3 feet. 
.saturday...south winds 15 to 25 knots veering southwest by mid
afternoon. a chance of showers. waves building to 2 to 4 feet. 
.saturday night...west winds 10 to 20 knots. a slight chance of
showers through midnight. waves subsiding to calm to 2 feet. 
.sunday...west winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.sunday night...northwest winds 10 to 20 knots veering north
after midnight. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots veering east. waves calm
to 2 feet. 
.tuesday...east winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 230204 cca
glfls 
expires:202610230800;;024567

open lake forecast for lake superior...corrected
national weather service marquette mi
1004 pm edt thu oct 22 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 30.4 inch high pressure over quebec, extending a 30.2 inch ridge 
over lake superior through the rest of the week, builds to 30.5 
inches through friday night as it drops south towards new england. 
by saturday afternoon, a 29.2 inch low over northern manitoba drags 
a 30.1 inch trough over the west half of lake superior. the trough 
remains over the lake until saturday night. high pressure of at 
least 30.6 inches over the canadian prairies on sunday and monday 
pushes ridging of at least 30.4 inches over the upper great lakes on 
sunday. the ridging intensifies to 30.6 inches monday night into 
tuesday morning as the high's center moves overhead. the high 
retreats east into new england by wednesday morning. 




lsz263-230800-
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-
1004 pm edt thu oct 22 2026

...dense fog advisory in effect until 11 am edt friday...

.rest of tonight...southeast winds 5 to 15 knots veering south
late. patchy dense fog. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming east 5 to 15 knots late.
patchy dense fog through early afternoon. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. waves building to 2 to 4 feet. 
.saturday...south winds 15 to 25 knots. a slight chance of
showers by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.saturday night...southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. a slight chance of showers through
midnight. waves subsiding to 1 to 3 feet. 
.sunday...west winds 10 to 20 knots. waves building to 2 to
4 feet. 
.sunday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...north winds 5 to 15 knots veering northeast. waves
subsiding to calm to 2 feet. 
.tuesday...east winds 5 to 15 knots veering south. waves calm to
2 feet. 

$$