fzus63 kmqt 240802
glfls 
expires:202607242000;;509843

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri jul 24 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... 

30.0 inch remnant ridging over lake superior today gives way to 29.8 
inch troughing tonight as a parent 29.3 inch low tracks across 
hudson bay tonight. weak ridging of around 29.9 inches develops over 
lake superior saturday afternoon before weakening further to 29.8 
inches by sunday morning. a 29.6 inch clipper low then moves into 
the upper great lakes or upper midwest by monday before leaving east 
towards the st. lawrence seaway at 29.4 inches on tuesday. behind 
the clipper, weak ridging of at least 29.8 inches returns to lake 
superior on tuesday, increasing to at least 29.9 inches by wednesday 
morning.




lsz162-242000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt fri jul 24 2026 /301 am cdt fri jul 24 2026/

.early this morning...southwest winds 10 to 20 knots. waves 1 to
3 feet. 
.today...southwest winds 10 to 20 knots backing south late. waves
subsiding to calm to 2 feet. 
.tonight...south winds 15 to 25 knots veering southwest after
midnight. a chance of showers and thunderstorms. waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.saturday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. waves subsiding to calm to 2 feet. 
.saturday night...north winds 5 to 15 knots veering northeast
after midnight. a slight chance of showers after midnight. waves
calm to 2 feet. 
.sunday...east winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots backing northeast after
midnight. a chance of showers. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots backing north. a chance
of showers. waves calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots backing north. waves
calm to 2 feet. 

$$

fzus63 kmqt 240802
glfls 
expires:202607242000;;509844

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri jul 24 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... 

30.0 inch remnant ridging over lake superior today gives way to 29.8 
inch troughing tonight as a parent 29.3 inch low tracks across 
hudson bay tonight. weak ridging of around 29.9 inches develops over 
lake superior saturday afternoon before weakening further to 29.8 
inches by sunday morning. a 29.6 inch clipper low then moves into 
the upper great lakes or upper midwest by monday before leaving east 
towards the st. lawrence seaway at 29.4 inches on tuesday. behind 
the clipper, weak ridging of at least 29.8 inches returns to lake 
superior on tuesday, increasing to at least 29.9 inches by wednesday 
morning.




lsz263-242000-
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 fri jul 24 2026

.early this morning...southwest winds 10 to 20 knots. waves 2 to
4 feet. 
.today...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then becoming south 10 to 20 knots
late. waves subsiding to 1 to 3 feet. 
.tonight...southwest winds 15 to 25 knots. a chance of showers
and thunderstorms. waves building to 3 to 6 feet occasionally to
8 feet. 
.saturday...southwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.saturday night...south winds 5 to 15 knots becoming east less
than 10 knots after midnight. waves calm to 2 feet. 
.sunday...east winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots backing northeast after
midnight. a chance of showers. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots backing north. a chance
of showers. waves calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots becoming north less than
10 knots. waves calm to 2 feet. 

$$