fzus63 kmqt 240802
glfls 
expires:202609242000;;967767

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu sep 24 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 30.6 inch high centered over quebec begins to break down today, 
weakening to 30.4 inches tonight. by late friday, the high weakens 
to 30.3 inches over the eastern great lakes basin as a 29.5 inch low 
develops over the northern rockies. on saturday the high begins 
shifting northeast toward northern quebec while the low deepens and 
moves north through the canadian prairies. sunday through monday, 
the high shifts east to the canadian maritimes, weakening to 30.0 
inches. this gradually weakens high pressure ridging over lake 
superior from 30.1 inches sunday morning to 29.9 inches by the end 
of monday as a 29.8 inch trough approaches from the west.




lsz162-242000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt thu sep 24 2026 /301 am cdt thu sep 24 2026/

.early this morning...south winds 5 to 15 knots. waves calm to
2 feet. 
.today...south winds 5 to 15 knots backing east late. a slight
chance of showers by mid afternoon. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots becoming northeast less than
10 knots after midnight, then veering south late. a slight chance
of showers through midnight. patchy fog after midnight. waves
calm to 2 feet. 
.friday...south winds less than 10 knots backing north in the
afternoon, then becoming northeast 5 to 15 knots late. patchy fog
through early afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots veering south after
midnight. a chance of showers. waves calm to 2 feet. 
.sunday...south winds 5 to 15 knots becoming southwest less than
10 knots. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 

$$

fzus63 kmqt 240802
glfls 
expires:202609242000;;967768

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu sep 24 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 30.6 inch high centered over quebec begins to break down today, 
weakening to 30.4 inches tonight. by late friday, the high weakens 
to 30.3 inches over the eastern great lakes basin as a 29.5 inch low 
develops over the northern rockies. on saturday the high begins 
shifting northeast toward northern quebec while the low deepens and 
moves north through the canadian prairies. sunday through monday, 
the high shifts east to the canadian maritimes, weakening to 30.0 
inches. this gradually weakens high pressure ridging over lake 
superior from 30.1 inches sunday morning to 29.9 inches by the end 
of monday as a 29.8 inch trough approaches from the west.




lsz263-242000-
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 thu sep 24 2026

.early this morning...south winds 5 to 15 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.today...south winds 5 to 15 knots backing east late. waves calm
to 2 feet. 
.tonight...southeast winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots becoming southwest less than
10 knots in the afternoon, then becoming northeast 5 to 15 knots
late. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 

$$