fzus63 kmqt 072001
glfls 
expires:202608080800;;787635

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri aug 7 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 passing cold front brings 29.8 inch troughing across the lake 
through tonight before 29.9 inch ridging returns saturday. weak 29.8 
inch troughing moves over lake superior saturday night, then benign 
ridging/troughing of around 29.9 inches maintains over the lake 
through sunday night. weak ridging of 29.9 to 30.0 inches returns 
for monday through wednesday.




lsz162-080800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt fri aug 7 2026 /301 pm cdt fri aug 7 2026/

.late this afternoon...west winds 10 to 20 knots. a slight chance
of showers and thunderstorms. waves calm to 2 feet. 
.tonight...west winds 10 to 20 knots veering northwest after
midnight, then backing west late. waves calm to 2 feet. 
.saturday...west winds 10 to 20 knots backing southwest in the
afternoon. waves building to 1 to 3 feet. 
.saturday night...southwest winds 5 to 15 knots veering west
after midnight. a chance of showers and a slight chance of
thunderstorms. waves subsiding to calm to 2 feet. 
.sunday...west winds 5 to 15 knots backing south by mid
afternoon. a slight chance of showers through early afternoon.
waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.monday night...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering north. waves calm
to 2 feet. 

$$

fzus63 kmqt 072001
glfls 
expires:202608080800;;787636

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri aug 7 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 passing cold front brings 29.8 inch troughing across the lake 
through tonight before 29.9 inch ridging returns saturday. weak 29.8 
inch troughing moves over lake superior saturday night, then benign 
ridging/troughing of around 29.9 inches maintains over the lake 
through sunday night. weak ridging of 29.9 to 30.0 inches returns 
for monday through wednesday.




lsz263-080800-
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 aug 7 2026

.late this afternoon...southwest winds 5 to 15 knots. a chance of
showers and thunderstorms. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots veering northwest after
midnight, then backing west late. a slight chance of showers and
thunderstorms through midnight. waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots becoming southwest 15 to
25 knots in the afternoon. waves building to 2 to 4 feet. 
.saturday night...southwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight, then backing southwest late. a
chance of showers. a slight chance of thunderstorms after
midnight. waves subsiding to calm to 2 feet. 
.sunday...west winds 5 to 15 knots backing south by mid
afternoon. a slight chance of showers. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots diminishing to less than
10 knots after midnight. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots becoming west less
than 10 knots after midnight. waves calm to 2 feet. 
.tuesday...west winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$