fzus63 kmqt 200801
glfls 
expires:202606202000;;059272

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat jun 20 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... 

this morning, lake superior is between a 29.3 inch low over the gulf 
of st. lawrence and broad 30.0 inch high pressure spanning much of 
the northern plains southeast into kentucky/tennessee. the high 
weakens to 29.9 inches as it moves over the upper great lakes 
tonight. the high builds slowly through sunday, reaching 30.1 inches 
monday morning. the high builds further to 30.2 inches tuesday 
morning as weak 30.0 inch low pressure forms over the dakotas that 
evening. this low tracks to wisconsin wednesday night as broad high 
pressure over much of canada weakens to 30.0 to 30.1 inches. 




lsz162-202000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt sat jun 20 2026 /300 am cdt sat jun 20 2026/

.early this morning...west winds 5 to 15 knots. waves calm to
2 feet. 
.today...west winds 5 to 15 knots backing southwest in the
afternoon. a chance of rain showers and a slight chance of
thunderstorms. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots veering north late. waves
calm to 2 feet. 
.sunday...north winds less than 10 knots becoming southeast 5 to
15 knots in the afternoon, then backing east late. waves calm to
2 feet. 
.sunday night...northeast winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.monday...northeast winds less than 10 knots becoming north 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...north winds less than 10 knots. waves calm to
2 feet. 
.tuesday...northeast winds 5 to 15 knots. a chance of rain
showers. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots becoming north less
than 10 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 200801
glfls 
expires:202606202000;;059273

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat jun 20 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... 

this morning, lake superior is between a 29.3 inch low over the gulf 
of st. lawrence and broad 30.0 inch high pressure spanning much of 
the northern plains southeast into kentucky/tennessee. the high 
weakens to 29.9 inches as it moves over the upper great lakes 
tonight. the high builds slowly through sunday, reaching 30.1 inches 
monday morning. the high builds further to 30.2 inches tuesday 
morning as weak 30.0 inch low pressure forms over the dakotas that 
evening. this low tracks to wisconsin wednesday night as broad high 
pressure over much of canada weakens to 30.0 to 30.1 inches. 




lsz263-202000-
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-
400 am edt sat jun 20 2026

.early this morning...west winds less than 10 knots. waves calm
to 2 feet. 
.today...west winds 5 to 15 knots. a slight chance of rain
showers. a slight chance of thunderstorms by mid afternoon. waves
calm to 2 feet. 
.tonight...west winds less than 10 knots veering north late.
waves calm to 2 feet. 
.sunday...north winds less than 10 knots veering south in the
afternoon, then backing northeast late. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots backing north after
midnight. waves calm to 2 feet. 
.monday...north winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.monday night...west winds 5 to 15 knots diminishing to less than
10 knots after midnight. waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots backing east. a chance
of rain showers. waves calm to 2 feet. 
.wednesday...east winds 5 to 15 knots backing northeast. waves
calm to 2 feet. 

$$