fzus63 kmqt 032001
glfls 
expires:202609040800;;850276

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 3 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 29.9 inch ridge extending over lake superior from a 30.2 inch high 
over hudson bay will gradually strengthen to 30.1 inches through 
this weekend as a 29.8 inch low over quebec shifts east towards nova 
scotia and deepens to 29.5 inches. ridging builds to 30.2 inches 
over the lake by early next week as high pressure over hudson bay 
strengthens to 30.4 inches. broad troughing of 29.5 to 29.6 inches 
will persist over the rockies and northern plains through the period.




lsz162-040800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu sep 3 2026 /301 pm cdt thu sep 3 2026/

.late this afternoon...northeast winds 20 to 30 knots. waves 2 to
4 feet. 
.tonight...east winds 20 to 30 knots becoming northeast 15 to
25 knots after midnight. a chance of showers and thunderstorms.
waves 2 to 4 feet. 
.friday...northeast winds 15 to 25 knots increasing to 20 to
30 knots late. a slight chance of showers through early
afternoon. waves 2 to 4 feet. 
.friday night...northeast winds 15 to 25 knots diminishing to
5 to 15 knots. waves subsiding to calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...east winds 5 to 15 knots backing northeast by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet. 
.monday...east gales to 35 knots. a chance of showers. a chance
of thunderstorms. showers likely. waves building to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...south gales to 35 knots becoming southwest 20 to
30 knots. showers likely. a chance of showers. waves subsiding to
1 to 3 feet. 

$$

fzus63 kmqt 032001
glfls 
expires:202609040800;;850277

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 3 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 29.9 inch ridge extending over lake superior from a 30.2 inch high 
over hudson bay will gradually strengthen to 30.1 inches through 
this weekend as a 29.8 inch low over quebec shifts east towards nova 
scotia and deepens to 29.5 inches. ridging builds to 30.2 inches 
over the lake by early next week as high pressure over hudson bay 
strengthens to 30.4 inches. broad troughing of 29.5 to 29.6 inches 
will persist over the rockies and northern plains through the period.




lsz263-040800-
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 thu sep 3 2026

.late this afternoon...east winds 20 to 30 knots. waves 1 to
3 feet building to 2 to 4 feet. 
.tonight...east winds 20 to 30 knots diminishing to 10 to
20 knots after midnight. a chance of showers and a slight chance
of thunderstorms. waves subsiding to 1 to 3 feet, then building
to 2 to 4 feet. 
.friday...east winds 10 to 20 knots backing northeast late. a
slight chance of showers through early afternoon. waves 2 to
4 feet. 
.friday night...northeast winds 10 to 20 knots becoming east 5 to
15 knots after midnight. a slight chance of showers after
midnight. waves subsiding to calm to 2 feet. 
.saturday...east winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.sunday...east winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.monday...east winds 15 to 25 knots becoming southeast gales to
35 knots. a chance of showers. showers likely. waves building to
3 to 6 feet occasionally to 8 feet. 
.tuesday...south gales to 35 knots veering southwest. showers
likely. a chance of showers. waves subsiding to 2 to 4 feet. 

$$