fzus63 kmqt 261401
glfls 
expires:202606262000;;938678

open lake forecast for lake superior
national weather service marquette mi
1000 am edt fri jun 26 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 30.1 inch high remains over lake superior today into sunday 
morning. meanwhile, broad low pressure of at least 29.5 inches 
deepens in the high plains today and saturday. by sunday afternoon, 
the high over lake superior retreats eastward but keeps 30.0 inch 
ridging over the upper great lakes while the low pressure remains 
over the plains. the high pressure then shifts over to lake ontario 
by monday morning as the now 29.4 inch low pressure consolidates 
over south dakota. through monday and tuesday, this low slides north 
to lake winnipeg while the 30.1 inch high shifts off the east coast. 
this progressively strengthens troughing over lake superior to 29.8 
inches by monday evening, remaining that way until tuesday morning. 
a shortwave low lifting from colorado then deepens the troughing 
over lake superior to 29.7 inches by tuesday evening as it heads 
toward northern ontario. with a 30.1 inch high developing over the 
southeastern u.s. on wednesday, we could see 29.9 inch ridging 
return over lake superior late in the day.  




lsz162-262000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt fri jun 26 2026 /900 am cdt fri jun 26 2026/

.rest of today...north winds less than 10 knots increasing to
5 to 15 knots in the afternoon, then veering northeast late.
waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots backing northeast after
midnight. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots becoming northeast 10 to
20 knots in the afternoon. waves building to 1 to 3 feet. 
.saturday night...northeast winds 10 to 20 knots veering east
after midnight. a slight chance of showers after midnight. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.sunday...east winds 10 to 20 knots becoming northeast 15 to
25 knots by mid afternoon. a chance of showers. a slight chance
of thunderstorms by mid afternoon. waves building to 2 to 4 feet.
.sunday night...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a chance of showers through midnight. a
chance of thunderstorms. showers likely after midnight. waves
2 to 4 feet. 
.monday...northeast winds 10 to 20 knots increasing to 15 to
25 knots. a chance of showers and thunderstorms. waves subsiding
to 1 to 3 feet, then building to 2 to 4 feet. 
.tuesday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. a chance of showers and thunderstorms. waves subsiding
to calm to 2 feet. 

$$

fzus63 kmqt 261401
glfls 
expires:202606262000;;938679

open lake forecast for lake superior
national weather service marquette mi
1000 am edt fri jun 26 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 30.1 inch high remains over lake superior today into sunday 
morning. meanwhile, broad low pressure of at least 29.5 inches 
deepens in the high plains today and saturday. by sunday afternoon, 
the high over lake superior retreats eastward but keeps 30.0 inch 
ridging over the upper great lakes while the low pressure remains 
over the plains. the high pressure then shifts over to lake ontario 
by monday morning as the now 29.4 inch low pressure consolidates 
over south dakota. through monday and tuesday, this low slides north 
to lake winnipeg while the 30.1 inch high shifts off the east coast. 
this progressively strengthens troughing over lake superior to 29.8 
inches by monday evening, remaining that way until tuesday morning. 
a shortwave low lifting from colorado then deepens the troughing 
over lake superior to 29.7 inches by tuesday evening as it heads 
toward northern ontario. with a 30.1 inch high developing over the 
southeastern u.s. on wednesday, we could see 29.9 inch ridging 
return over lake superior late in the day.  




lsz263-262000-
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 am edt fri jun 26 2026

.rest of today...southwest winds less than 10 knots increasing to
5 to 15 knots in the afternoon, then backing northeast late.
waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots diminishing to less than
10 knots late. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots backing northeast in the
afternoon, then increasing to 10 to 20 knots late. waves calm to
2 feet. 
.saturday night...east winds 10 to 20 knots becoming southeast
5 to 15 knots after midnight. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.sunday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. a chance of showers. waves building to 2 to
4 feet. 
.sunday night...east winds 15 to 25 knots becoming southeast
10 to 20 knots 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. 
.monday...east winds 10 to 20 knots veering southwest. a chance
of showers. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.tuesday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers and thunderstorms. waves subsiding
to calm to 2 feet. 

$$