fzus63 kmqt 302001
glfls 
expires:202607010800;;183220

open lake forecast for lake superior
national weather service marquette mi
401 pm 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 29.2 inch low will remain stalled near lake winnipeg tonight and 
gradually weaken to 29.5 inches by wednesday morning. it will then 
weaken further with a broad 29.6 inch low over ontario and quebec by 
late wednesday afternoon. the low will push toward the hudson bay 
and quebec wednesday night into thursday dragging a 29.7 inch trough 
over lake superior. thereafter a 30.0 inch high will build over 
ontario, extending south into the upper great lakes through the 
weekend.




lsz162-010800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt tue jun 30 2026 /301 pm cdt tue jun 30 2026/

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

.late this afternoon...southwest winds 10 to 20 knots. waves calm
to 2 feet. 
.tonight...southwest winds 10 to 20 knots. waves calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots. a slight chance of
showers and 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 a slight chance of 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...west 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. 
.friday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.saturday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots becoming north less than
10 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202607010800;;183221

open lake forecast for lake superior
national weather service marquette mi
401 pm 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 29.2 inch low will remain stalled near lake winnipeg tonight and 
gradually weaken to 29.5 inches by wednesday morning. it will then 
weaken further with a broad 29.6 inch low over ontario and quebec by 
late wednesday afternoon. the low will push toward the hudson bay 
and quebec wednesday night into thursday dragging a 29.7 inch trough 
over lake superior. thereafter a 30.0 inch high will build over 
ontario, extending south into the upper great lakes through the 
weekend.




lsz263-010800-
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 jun 30 2026

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

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

$$