fzus63 kmqt 040801
glfls 
expires:202609042000;;879124

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri sep 4 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...

high pressure will be in control over the weekend as a 30.0 inch 
ridge builds over the lake. the ridge over the lake will gradually 
strengthen to 30.1 inches through this weekend as a 29.8 inch low 
over southeast 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.




lsz162-042000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt fri sep 4 2026 /300 am cdt fri sep 4 2026/

.early this morning...east winds 15 to 25 knots. showers likely
and a slight chance of thunderstorms. waves 2 to 4 feet. 
.today...northeast winds 15 to 25 knots. a chance of showers.
waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet. 
.tonight...northeast winds 10 to 20 knots diminishing to 5 to
15 knots late. a slight chance of showers through midnight. waves
subsiding to calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots increasing to 10 to
20 knots late. 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. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots. a chance of
showers and thunderstorms. waves calm to 2 feet. 
.monday...east gales to 40 knots. a chance of showers. showers.
waves building to 5 to 8 feet occasionally to 10 feet. 
.tuesday...south gales to 35 knots becoming west 20 to 30 knots.
showers likely. a chance of showers. waves subsiding to 1 to
3 feet. 

$$

fzus63 kmqt 040801
glfls 
expires:202609042000;;879125

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri sep 4 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...

high pressure will be in control over the weekend as a 30.0 inch 
ridge builds over the lake. the ridge over the lake will gradually 
strengthen to 30.1 inches through this weekend as a 29.8 inch low 
over southeast 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.




lsz263-042000-
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 fri sep 4 2026

.early this morning...east winds 10 to 20 knots. a chance of
showers and a slight chance of thunderstorms. waves 2 to 4 feet. 
.today...east winds 10 to 20 knots backing northeast late. a
chance of showers. waves 2 to 4 feet. 
.tonight...northeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. a slight chance of showers through
midnight. waves subsiding to calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots. 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. a chance of showers. waves calm to
2 feet. 
.monday...east gales to 35 knots. a chance of showers. waves
building to 4 to 7 feet occasionally to 9 feet. 
.tuesday...south gales to 40 knots. a chance of showers. waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 2 to 4 feet. 

$$