fzus63 kmqt 312001
glfls 
expires:202608010800;;405534

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 31 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 29.6 inch low pressure present over northern quebec this afternoon 
is dragging a 29.9 inch trough over the lake. troughing lingers over 
the lake into early saturday morning as the parent low continues to 
move northward through quebec. a 30.0 inch high will build over 
james bay on saturday, extending a weak 29.9 inch ridge over the 
lake. ridging over the lake builds further to 30.0 inches on sunday, 
lingering into monday. a weak trough of 29.9 inches then moves 
through the area on tuesday followed by 30.0 inch ridging on 
wednesday.




lsz162-010800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt fri jul 31 2026 /301 pm cdt fri jul 31 2026/

.late this afternoon...southwest winds 5 to 15 knots. patchy fog
and smoke. a slight chance of showers and thunderstorms. waves
calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight, then veering north late. a slight chance of showers and
thunderstorms through midnight. patchy smoke. patchy fog after
midnight. waves calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots veering east in the
afternoon, then backing northeast late. a slight chance of
showers by mid afternoon. waves calm to 2 feet. 
.saturday night...north winds 5 to 15 knots veering northeast
late. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.monday...east winds 5 to 15 knots. waves calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots veering southwest
after midnight. a chance of showers after midnight. waves calm to
2 feet. 
.tuesday...southwest winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots veering northwest.
waves calm to 2 feet. 

$$

fzus63 kmqt 312001
glfls 
expires:202608010800;;405535

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 31 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 29.6 inch low pressure present over northern quebec this afternoon 
is dragging a 29.9 inch trough over the lake. troughing lingers over 
the lake into early saturday morning as the parent low continues to 
move northward through quebec. a 30.0 inch high will build over 
james bay on saturday, extending a weak 29.9 inch ridge over the 
lake. ridging over the lake builds further to 30.0 inches on sunday, 
lingering into monday. a weak trough of 29.9 inches then moves 
through the area on tuesday followed by 30.0 inch ridging on 
wednesday.




lsz263-010800-
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 jul 31 2026

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

$$