fzus63 kmqt 280801
glfls 
expires:202609282000;;181902

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon sep 28 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 30.1 inch high pressure holds over lake superior today. thereafter 
a 29.7 inch trough will build into the plains with lake superior 
remaining between the trough and high pressure over the eastern u.s. 
the trough will shift to the western part of the lake by wednesday 
night as a 29.3 inch low moves from the canadian prairies to the 
hudson bay. behind the trough, high pressure of 30.4 inches develops 
over the central plains thursday night into friday, extending 30.2 
inch ridging over the lake.




lsz162-282000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt mon sep 28 2026 /301 am cdt mon sep 28 2026/

.early this morning...north winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.today...northeast winds less than 10 knots becoming east 5 to
15 knots in the afternoon, then backing northeast late. waves
calm to 2 feet. 
.tonight...east winds 5 to 15 knots veering south late. a slight
chance of showers after midnight. waves calm to 2 feet. 
.tuesday...south winds 10 to 20 knots. a chance of showers. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. showers likely through midnight, then a
chance of showers after midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.wednesday night...southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. a chance of showers through
midnight. waves calm to 2 feet. 
.thursday...west winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.friday...west winds 10 to 20 knots diminishing to 5 to 15 knots.
waves calm to 2 feet. 

$$

fzus63 kmqt 280801
glfls 
expires:202609282000;;181903

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon sep 28 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 30.1 inch high pressure holds over lake superior today. thereafter 
a 29.7 inch trough will build into the plains with lake superior 
remaining between the trough and high pressure over the eastern u.s. 
the trough will shift to the western part of the lake by wednesday 
night as a 29.3 inch low moves from the canadian prairies to the 
hudson bay. behind the trough, high pressure of 30.4 inches develops 
over the central plains thursday night into friday, extending 30.2 
inch ridging over the lake.




lsz263-282000-
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 am edt mon sep 28 2026

.early this morning...north winds 5 to 15 knots. waves calm to
2 feet. 
.today...northeast 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. 
.tonight...east winds 5 to 15 knots veering south late. a slight
chance of showers after midnight. waves calm to 2 feet. 
.tuesday...south winds 15 to 25 knots diminishing to 10 to
20 knots late. a chance of showers by mid afternoon. waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.tuesday night...south winds 10 to 20 knots. showers likely.
waves subsiding to calm to 2 feet. 
.wednesday...south winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. a chance of showers. waves calm to
2 feet. 
.wednesday night...southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. a chance of showers. waves
building to 1 to 3 feet. 
.thursday...west winds 20 to 30 knots. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 1 to 3 feet. 
.friday...west winds 10 to 20 knots diminishing to 5 to 15 knots.
waves subsiding to calm to 2 feet. 

$$