fzus63 kmqt 150801
glfls 
expires:202609152000;;480095

open lake forecast for lake superior
national weather service marquette mi
400 am 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 29.3 inch low currently over manitoba moves to southern hudson bay 
at 29.4 inches by this afternoon, bringing 29.7 inch troughing 
across lake superior. meanwhile, 30.2 inch high pressure develops 
over the northern plains this afternoon, strengthening to 30.4 
inches as it crosses the upper great lakes on wednesday. high 
pressure ridging of 30.2 to 30.3 inches then looks to remain over 
lake superior through the rest of the workweek. 




lsz162-152000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt tue sep 15 2026 /300 am cdt tue sep 15 2026/

...gale warning in effect from 8 am edt /7 am cdt/ this morning
to 4 pm edt /3 pm cdt/ this afternoon...

.early this morning...southwest winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.today...southwest gales to 40 knots veering west in the
afternoon, then diminishing to 20 to 30 knots late. waves
building to 7 to 10 feet occasionally to 13 feet, then 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. waves calm to
2 feet. 
.thursday...northwest winds 5 to 15 knots backing west by mid
afternoon. 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 15 to 25 knots increasing to 20 to 30 knots.
a chance of showers. waves building to 2 to 4 feet. 
.saturday...northeast winds 20 to 30 knots. a chance of showers.
waves building to 3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202609152000;;480096

open lake forecast for lake superior
national weather service marquette mi
400 am 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 29.3 inch low currently over manitoba moves to southern hudson bay 
at 29.4 inches by this afternoon, bringing 29.7 inch troughing 
across lake superior. meanwhile, 30.2 inch high pressure develops 
over the northern plains this afternoon, strengthening to 30.4 
inches as it crosses the upper great lakes on wednesday. high 
pressure ridging of 30.2 to 30.3 inches then looks to remain over 
lake superior through the rest of the workweek. 




lsz263-152000-
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 15 2026

...gale warning in effect from 8 am edt this morning through this
evening...

.early this morning...southwest winds 20 to 30 knots. waves 4 to
7 feet occasionally to 9 feet. 
.today...southwest gales to 45 knots veering west in the
afternoon. waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 7 to 10 feet occasionally to 13 feet. 
.tonight...west winds 15 to 25 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 becoming northeast 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 south after
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 east after
midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots increasing to 15 to 25 knots.
a chance of showers. waves building to 2 to 4 feet. 
.saturday...east winds 20 to 30 knots backing northeast. a chance
of showers. waves building to 3 to 5 feet occasionally to 7 feet.

$$