fzus63 kmqt 030201
glfls 
expires:202609030800;;806762

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed sep 2 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.




lsz162-030800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt wed sep 2 2026 /900 pm cdt wed sep 2 2026/

.rest of tonight...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...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. 
.thursday night...east winds 15 to 25 knots becoming northeast
10 to 20 knots after midnight. a chance of showers and a slight
chance of thunderstorms. waves subsiding to 1 to 3 feet. 
.friday...northeast winds 15 to 25 knots. a slight chance of
showers through early afternoon. waves building to 2 to 4 feet. 
.friday night...northeast winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. a slight chance of showers and
thunderstorms through 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. a chance of
showers and thunderstorms. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots becoming northeast 10 to
20 knots. a chance of showers. 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 030201
glfls 
expires:202609030800;;806763

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed sep 2 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.




lsz263-030800-
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-
1000 pm edt wed sep 2 2026

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

$$