fzus63 kmqt 252002
glfls 
expires:202609260800;;048315

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri sep 25 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...

30.3 inch high pressure remains stretched out over the great lakes 
basin today through saturday, with 29.4 inch low pressure developing 
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 ridging over lake superior from 30.1 inches 
sunday morning to 29.9 inches by late monday as a 29.8 inch trough 
approaches from the west. by tuesday evening the trough will move 
over lake superior at around 29.7 inches.




lsz162-260800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt fri sep 25 2026 /301 pm cdt fri sep 25 2026/

.late this afternoon...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...east winds 5 to 15 knots backing northeast after
midnight. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots increasing to 10 to 20 knots
late. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots veering south after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet. 
.sunday...south winds 5 to 15 knots veering southwest by mid
afternoon. a slight chance of showers through early afternoon.
waves calm to 2 feet. 
.sunday night...west winds less than 10 knots veering north after
midnight. waves calm to 2 feet. 
.monday...east winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots veering west. waves
calm to 2 feet. 

$$

fzus63 kmqt 252002
glfls 
expires:202609260800;;048316

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri sep 25 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...

30.3 inch high pressure remains stretched out over the great lakes 
basin today through saturday, with 29.4 inch low pressure developing 
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 ridging over lake superior from 30.1 inches 
sunday morning to 29.9 inches by late monday as a 29.8 inch trough 
approaches from the west. by tuesday evening the trough will move 
over lake superior at around 29.7 inches.




lsz263-260800-
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 fri sep 25 2026

.late this afternoon...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...east winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots backing east in the
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots veering south after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet. 
.sunday...south winds 5 to 15 knots veering southwest by mid
afternoon. a slight chance of showers through early afternoon.
waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots becoming west less
than 10 knots after midnight. waves calm to 2 feet. 
.monday...northeast winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. a chance of showers. waves building to 1 to 3 feet. 

$$