fzus63 kmqt 070801
glfls 
expires:202605072000;;152794

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu may 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... 

weak 29.9 inch ridging over lake superior this morning weakens to 
29.8 inches by this evening as the area becomes sandwiched among a 
29.4 inch low over hudson bay, a 29.4 inch low moving over labrador, 
a low of 29.8 inches over the black hills, a high of 30.1 inches 
over southern oklahoma, and a weakening 29.9 inch high over the 
saskatchewan/manitoba line. the hudson bay and black hills lows work 
to pass a 29.6 inch trough over lake superior by friday, with this 
troughing eventually consolidating into a 29.5 inch low over lake 
superior by saturday morning. the low then lifts into ontario 
through the day on saturday as high pressure ridging begins to push 
back into the region from the canadian prairies. the high pressure 
builds back up to 30.1 inches over lake superior by sunday as the 
parent high strengthens over the canadian prairies and northern 
plains. the parent high eventually tracks over the upper great lakes 
at 30.3 inches on monday.



lsz162-072000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt thu may 7 2026 /301 am cdt thu may 7 2026/

.early this morning...west winds 5 to 15 knots. waves calm to
2 feet. 
.today...west winds 10 to 20 knots becoming southwest 5 to
15 knots in the afternoon. a chance of rain showers by mid
afternoon. waves building to 1 to 3 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight. waves subsiding to calm to 2 feet. 
.friday...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. sprinkles by mid afternoon. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet. 
.friday night...northwest winds 5 to 15 knots backing west after
midnight. a slight chance of rain showers after midnight. waves
calm to 2 feet. 
.saturday...west winds 10 to 20 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.saturday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.sunday...west winds 5 to 15 knots veering north. waves calm to
2 feet. 
.monday...south winds 5 to 15 knots backing east. waves calm to
2 feet. 

$$

fzus63 kmqt 070801
glfls 
expires:202605072000;;152795

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu may 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... 

weak 29.9 inch ridging over lake superior this morning weakens to 
29.8 inches by this evening as the area becomes sandwiched among a 
29.4 inch low over hudson bay, a 29.4 inch low moving over labrador, 
a low of 29.8 inches over the black hills, a high of 30.1 inches 
over southern oklahoma, and a weakening 29.9 inch high over the 
saskatchewan/manitoba line. the hudson bay and black hills lows work 
to pass a 29.6 inch trough over lake superior by friday, with this 
troughing eventually consolidating into a 29.5 inch low over lake 
superior by saturday morning. the low then lifts into ontario 
through the day on saturday as high pressure ridging begins to push 
back into the region from the canadian prairies. the high pressure 
builds back up to 30.1 inches over lake superior by sunday as the 
parent high strengthens over the canadian prairies and northern 
plains. the parent high eventually tracks over the upper great lakes 
at 30.3 inches on monday.



lsz263-072000-
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 am edt thu may 7 2026

.early this morning...west winds 5 to 15 knots. waves calm to
2 feet. 
.today...west winds 5 to 15 knots increasing to 10 to 20 knots in
the afternoon, then backing southwest late. a chance of rain
showers by mid afternoon. waves building to 1 to 3 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight, then backing southwest late. waves subsiding to calm to
2 feet. 
.friday...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.friday night...southwest winds 5 to 15 knots veering west after
midnight. a slight chance of rain showers after midnight. waves
subsiding to calm to 2 feet. 
.saturday...west winds 5 to 15 knots. waves building to 1 to
3 feet. 
.saturday night...northwest winds 5 to 15 knots. waves 1 to
3 feet. 
.sunday...west winds 5 to 15 knots veering northwest. waves
subsiding to calm to 2 feet. 
.monday...south winds 5 to 15 knots backing southeast. waves calm
to 2 feet. 

$$