fzus63 kmqt 030801
glfls 
expires:202609032000;;821597

open lake forecast for lake superior
national weather service marquette mi
400 am 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...

29.9 inch ridge is expanding from manitoba into the upper great 
lakes as a 29.8 inch trough continues to slide eastward. the ridge 
remains over the area through friday while building to 30.0 inches. 
ridging will continue to build to 30.1 inches by sunday night and 
persist through monday afternoon.




lsz162-032000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt thu sep 3 2026 /300 am cdt thu sep 3 2026/

.early this morning...northeast winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.today...northeast winds 5 to 15 knots becoming east 15 to
25 knots in the afternoon, then becoming northeast 20 to 30 knots
late. waves building to 2 to 4 feet. 
.tonight...east winds 15 to 25 knots becoming northeast 10 to
20 knots after midnight. a slight chance of showers and
thunderstorms. waves subsiding to 1 to 3 feet. 
.friday...northeast winds 15 to 25 knots increasing to 20 to
30 knots late. a slight chance of showers through early
afternoon. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.friday night...northeast winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. 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 becoming northeast 10 to
20 knots. a chance of showers and thunderstorms. waves building
to 2 to 4 feet. 
.monday...east gales to 35 knots. a chance of showers. showers
likely. waves building to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 030801
glfls 
expires:202609032000;;821598

open lake forecast for lake superior
national weather service marquette mi
400 am 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...

29.9 inch ridge is expanding from manitoba into the upper great 
lakes as a 29.8 inch trough continues to slide eastward. the ridge 
remains over the area through friday while building to 30.0 inches. 
ridging will continue to build to 30.1 inches by sunday night and 
persist through monday afternoon.




lsz263-032000-
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 thu sep 3 2026

.early this morning...northeast winds less than 10 knots. patchy
fog. waves calm to 2 feet. 
.today...northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then becoming east 20 to 30 knots
late. waves building to 1 to 3 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a slight chance of showers and
thunderstorms. patchy fog after midnight. waves subsiding to calm
to 2 feet. 
.friday...east winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. waves building to 2 to 4 feet. 
.friday night...east winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. a slight chance of showers through
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 veering southeast
after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots increasing to 15 to 25 knots.
a chance of showers. waves building to 2 to 4 feet. 
.monday...east winds 20 to 30 knots veering southeast. a chance
of showers. showers likely. waves building to 3 to 6 feet
occasionally to 8 feet. 

$$