fzus63 kmqt 191401
glfls 
expires:202605192000;;825961

open lake forecast for lake superior
national weather service marquette mi
1001 am 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 over eastern lake superior this morning moves to the 
ontario/quebec line south of james bay at 29.6 inches by 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 into friday. a 29.9 inch low lifts into the lower 
great lakes from the southern plains on saturday, but 30.1 inch 
ridging persists over lake superior.



lsz162-192000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt tue may 19 2026 /901 am cdt tue may 19 2026/

.rest of today...west winds 10 to 20 knots. waves 2 to 4 feet
subsiding to 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. waves calm to
2 feet. 
.thursday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots. waves calm to 2 feet.
.friday...northeast winds 10 to 20 knots. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots. a chance of rain
showers. waves calm to 2 feet. 

$$

fzus63 kmqt 191401
glfls 
expires:202605192000;;825962

open lake forecast for lake superior
national weather service marquette mi
1001 am 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 over eastern lake superior this morning moves to the 
ontario/quebec line south of james bay at 29.6 inches by 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 into friday. a 29.9 inch low lifts into the lower 
great lakes from the southern plains on saturday, but 30.1 inch 
ridging persists over lake superior.



lsz263-192000-
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-
1001 am edt tue may 19 2026

.rest of today...west winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then increasing to 10 to 20 knots
late. waves 3 to 5 feet occasionally to 7 feet subsiding to 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, then backing south late. waves calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 
.saturday...east winds 5 to 15 knots. waves calm to 2 feet. 

$$