fzus63 kmqt 301401
glfls 
expires:202606302000;;167575

open lake forecast for lake superior
national weather service marquette mi
1001 am edt tue jun 30 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 29.4 inch low will rotate around lake winnipeg, deepening to 29.1 
inches this morning.  this low wobbles around southern manitoba 
today, weakening to 29.5 inches as it crosses northern ontario 
tomorrow. thursday morning, the low will further weaken to 29.6 
inches over northern quebec while 30.0 inch high pressure builds 
over the us southeast and northern manitoba and broad 29.8 inch low 
pressure spreads over the high plains. friday into the weekend, the 
high over canada moves into hudson bay, building to 30.1 inches. 




lsz162-302000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt tue jun 30 2026 /901 am cdt tue jun 30 2026/

...dense fog advisory in effect until 8 pm edt /7 pm cdt/ this
evening...

.rest of today...southwest winds 5 to 15 knots increasing to
10 to 20 knots late. patchy fog by late morning. waves calm to
2 feet. 
.tonight...southwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots. a chance of showers
and a slight chance of thunderstorms by mid afternoon. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.wednesday night...southwest winds 5 to 15 knots. a chance of
showers and thunderstorms through midnight. waves calm to 2 feet.
.thursday...southwest winds 10 to 20 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 
.thursday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.friday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.saturday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 301401
glfls 
expires:202606302000;;167576

open lake forecast for lake superior
national weather service marquette mi
1001 am edt tue jun 30 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 29.4 inch low will rotate around lake winnipeg, deepening to 29.1 
inches this morning.  this low wobbles around southern manitoba 
today, weakening to 29.5 inches as it crosses northern ontario 
tomorrow. thursday morning, the low will further weaken to 29.6 
inches over northern quebec while 30.0 inch high pressure builds 
over the us southeast and northern manitoba and broad 29.8 inch low 
pressure spreads over the high plains. friday into the weekend, the 
high over canada moves into hudson bay, building to 30.1 inches. 




lsz263-302000-
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 jun 30 2026

...dense fog advisory in effect until 8 pm edt this evening...

.rest of today...southwest winds 5 to 15 knots increasing to
10 to 20 knots in the afternoon. patchy dense fog. a slight
chance of showers and thunderstorms by mid afternoon. some
thunderstorms may be severe. waves 1 to 3 feet subsiding to calm
to 2 feet, then building to 1 to 3 feet. 
.tonight...southwest winds 10 to 20 knots diminishing to 5 to
15 knots late. waves building to 2 to 4 feet, then subsiding to
1 to 3 feet. 
.wednesday...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. a chance of showers by mid afternoon.
waves building to 2 to 4 feet. 
.wednesday night...southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. a chance of showers and
thunderstorms through midnight. waves subsiding to calm to
2 feet. 
.thursday...southwest winds 10 to 20 knots. waves building to
2 to 4 feet, then subsiding to 1 to 3 feet. 
.thursday night...west winds 5 to 15 knots veering northeast
after midnight. waves subsiding to calm to 2 feet. 
.friday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 

$$