fzus63 kmqt 152115 cca
glfls 
expires:202511160900;;471033

open lake forecast for lake superior...corrected
national weather service marquette mi
415 pm est sat nov 15 2025

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 29.3 inch trough is placed just north of lake huron this 
afternoon. the trough exits into eastern ontario this evening and 
develops into a 29.1 inch low over new england by sunday morning, 
further deepening to 28.8 inches over the canadian maritimes sunday 
night into monday. troughing gradually weakens to 29.9 inches over 
lake superior through sunday night as this occurs. meanwhile, 30.1 
inch high pressure extending from saskatchewan to the dakotas this 
weekend builds to 30.3 inches as it shifts east to the great lakes 
by tuesday night. high pressure persists at around 30.2 inches over 
the lake through late next week as the high shifts east to new 
england by thursday night.



lsz162-160900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
415 pm est sat nov 15 2025 /315 pm cst sat nov 15 2025/

.late this afternoon...northwest winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...northwest winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 20 to 30 knots late.
waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 
.sunday...northwest winds 20 to 30 knots. waves subsiding to 2 to
4 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots late. waves subsiding to calm to 2 feet. 
.monday...northwest winds 5 to 15 knots. waves calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.tuesday...east winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.wednesday...south winds 5 to 15 knots veering southwest. waves
calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots becoming north 10 to
20 knots. a chance of rain showers. waves calm to 2 feet. 

$$

fzus63 kmqt 152115 cca
glfls 
expires:202511160900;;471034

open lake forecast for lake superior...corrected
national weather service marquette mi
415 pm est sat nov 15 2025

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 29.3 inch trough is placed just north of lake huron this 
afternoon. the trough exits into eastern ontario this evening and 
develops into a 29.1 inch low over new england by sunday morning, 
further deepening to 28.8 inches over the canadian maritimes sunday 
night into monday. troughing gradually weakens to 29.9 inches over 
lake superior through sunday night as this occurs. meanwhile, 30.1 
inch high pressure extending from saskatchewan to the dakotas this 
weekend builds to 30.3 inches as it shifts east to the great lakes 
by tuesday night. high pressure persists at around 30.2 inches over 
the lake through late next week as the high shifts east to new 
england by thursday night.



lsz263-160900-
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-
415 pm est sat nov 15 2025

.late this afternoon...northwest winds 20 to 30 knots. waves 4 to
8 feet occasionally to 10 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. waves 5 to 8 feet occasionally to 10 feet. 
.sunday...northwest winds 15 to 25 knots. waves subsiding to 3 to
6 feet occasionally to 8 feet. 
.sunday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots by midnight. waves subsiding to 2 to 4 feet. 
.monday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. waves subsiding to calm to 2 feet. 
.monday night...north winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...east winds less than 10 knots veering south
after midnight. waves calm to 2 feet. 
.wednesday...south winds 5 to 15 knots veering southwest. waves
calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots veering north. a chance
of rain showers. waves calm to 2 feet. 

$$