fzus63 kmqt 152001
glfls 
expires:202609160800;;508110

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue sep 15 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 is working into northern ontario this afternoon, 
bringing 29.7 inch troughing across lake superior. meanwhile, 30.2 
inch high pressure over the northern plains strengthens to 30.4 
inches as it crosses the upper great lakes on tomorrow. high 
pressure ridging around 30.3 inches then settles over lake superior 
through the rest of the workweek. 




lsz162-160800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt tue sep 15 2026 /301 pm cdt tue sep 15 2026/

...gale warning in effect until 5 pm edt /4 pm cdt/ this
afternoon...

.late this afternoon...west winds 20 to 30 knots. waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tonight...west winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight, then veering northwest late. waves subsiding to
calm to 2 feet. 
.wednesday...north winds 5 to 15 knots veering east in the
afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots diminishing to less
than 10 knots after midnight, then veering west late. a slight
chance of showers through midnight. waves calm to 2 feet. 
.thursday...west winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots becoming northeast
10 to 20 knots after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. waves building to 1 to 3 feet. 
.friday night...east winds 15 to 25 knots. a chance of showers.
waves 1 to 3 feet. 
.saturday...northeast winds 20 to 30 knots diminishing to 15 to
25 knots. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.sunday...northeast winds 20 to 30 knots diminishing to 15 to
25 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202609160800;;508111

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue sep 15 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 is working into northern ontario this afternoon, 
bringing 29.7 inch troughing across lake superior. meanwhile, 30.2 
inch high pressure over the northern plains strengthens to 30.4 
inches as it crosses the upper great lakes on tomorrow. high 
pressure ridging around 30.3 inches then settles over lake superior 
through the rest of the workweek. 




lsz263-160800-
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 sep 15 2026

...gale warning in effect until 8 pm edt this evening...

.late this afternoon...west gales to 35 knots. waves 9 to 12 feet
occasionally to 15 feet subsiding to 6 to 9 feet occasionally to
11 feet. 
.tonight...west winds 20 to 30 knots diminishing to 10 to
20 knots after midnight, then veering northwest late. waves
subsiding to calm to 2 feet. 
.wednesday...north winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming east 5 to 15 knots late.
waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots veering southwest
late. a slight chance of showers through midnight. waves calm to
2 feet. 
.thursday...west winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves calm to 2 feet. 
.friday night...east winds 10 to 20 knots. a chance of showers.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.saturday...east winds 15 to 25 knots backing northeast. waves
building to 1 to 3 feet. 
.sunday...northeast winds 20 to 30 knots becoming east 15 to
25 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 

$$