fzus63 kmqt 010801
glfls 
expires:202609012000;;708453

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue sep 1 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 will slowly move east over ontario through wednesday 
and weaken to 29.8 inches as it reaches james bay. this will bring 
broad 29.9 inch troughing over the upper great lakes through 
wednesday. a 29.9 inch ridge will move into the area wednesday night 
and build to 30.0 inches through friday. ridging will give way to 
another weak trough on saturday night with ridging of 30.1 inches 
building back in for sunday.




lsz162-012000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt tue sep 1 2026 /300 am cdt tue sep 1 2026/

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

.early this morning...southwest winds 5 to 15 knots. areas of
dense fog. waves calm to 2 feet. 
.today...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then veering west late. areas of dense
fog through early afternoon. waves building to 1 to 3 feet. 
.tonight...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.wednesday...north winds 5 to 15 knots veering south in the
afternoon. waves calm to 2 feet. 
.wednesday night...east winds less than 10 knots becoming
northeast 5 to 15 knots after midnight. waves calm to 2 feet. 
.thursday...northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.thursday night...northeast winds 10 to 20 knots. a chance of
showers and thunderstorms. waves subsiding to calm to 2 feet. 
.friday...northeast winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 

$$

fzus63 kmqt 010801
glfls 
expires:202609012000;;708454

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue sep 1 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 will slowly move east over ontario through wednesday 
and weaken to 29.8 inches as it reaches james bay. this will bring 
broad 29.9 inch troughing over the upper great lakes through 
wednesday. a 29.9 inch ridge will move into the area wednesday night 
and build to 30.0 inches through friday. ridging will give way to 
another weak trough on saturday night with ridging of 30.1 inches 
building back in for sunday.




lsz263-012000-
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-
400 am edt tue sep 1 2026

...dense fog advisory in effect until 11 am edt this morning...

.early this morning...southwest winds 5 to 15 knots. areas of
dense fog. waves calm to 2 feet. 
.today...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then veering west late. areas of dense
fog through early afternoon. waves building to 2 to 4 feet. 
.tonight...west 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
late. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots becoming southeast
less than 10 knots after midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots increasing to 15 to 25 knots
by mid afternoon. waves calm to 2 feet. 
.thursday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. a chance of thunderstorms. waves calm to
2 feet. 
.friday...east winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.saturday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 

$$