fzus63 kmqt 192001
glfls 
expires:202605200800;;308166

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue may 19 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 29.7 inch low northeast of lake superior moves to quebec at 29.6 
inches this evening. afterwards, a 30.2 inch high over the northern 
plains builds to 30.4 inches tonight into wednesday as it tracks 
eastward into the upper great lakes. the high pressure shifts east 
on thursday while leaving lingering ridging of at least 30.2 inches 
over lake superior through friday. a 29.9 inch low lifts into the 
lower great lakes from the southern plains friday night and 
saturday, but 30.1 inch ridging likely persists over lake superior 
the remainder of the weekend.



lsz162-200800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt tue may 19 2026 /301 pm cdt tue may 19 2026/

.late this afternoon...west winds 15 to 25 knots. waves 1 to
3 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing south in the
afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots backing
northeast after midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots. waves calm to 2 feet.
.friday...east winds 10 to 20 knots becoming northeast 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.friday night...northeast winds 10 to 20 knots. a chance of rain
showers. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.saturday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of rain showers. waves subsiding to calm to
2 feet. 
.sunday...southwest winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202605200800;;308167

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue may 19 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 29.7 inch low northeast of lake superior moves to quebec at 29.6 
inches this evening. afterwards, a 30.2 inch high over the northern 
plains builds to 30.4 inches tonight into wednesday as it tracks 
eastward into the upper great lakes. the high pressure shifts east 
on thursday while leaving lingering ridging of at least 30.2 inches 
over lake superior through friday. a 29.9 inch low lifts into the 
lower great lakes from the southern plains friday night and 
saturday, but 30.1 inch ridging likely persists over lake superior 
the remainder of the weekend.



lsz263-200800-
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 pm edt tue may 19 2026

.late this afternoon...west winds 10 to 20 knots. waves 2 to
4 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing southwest in
the afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots veering south
late. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves building to 2 to 4 feet. 
.friday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to 1 to 3 feet. 
.saturday...east winds 5 to 15 knots. a chance of rain showers.
waves building to 2 to 4 feet, then subsiding to calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots backing south. waves calm
to 2 feet. 

$$