fzus63 kmqt 202001
glfls 
expires:202606210800;;087118

open lake forecast for lake superior
national weather service marquette mi
401 pm 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 afternoon, lake superior is sits under 29.9 inches of pressure 
between a surface low over the gulf of st. lawrence and high 
pressure over the northern plains. lake superior remains at 29.9 
inches through sunday night as the high weakens and moves over the 
upper great lakes. pressure increases to 30.2 inches by tuesday 
morning. this ridging begins to break down late tuesday, decreasing 
to 29.9 by thursday afternoon as a weak low tracks from wisconsin to 
the upper great lakes.




lsz162-210800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sat jun 20 2026 /301 pm cdt sat jun 20 2026/

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

$$

fzus63 kmqt 202001
glfls 
expires:202606210800;;087119

open lake forecast for lake superior
national weather service marquette mi
401 pm 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 afternoon, lake superior is sits under 29.9 inches of pressure 
between a surface low over the gulf of st. lawrence and high 
pressure over the northern plains. lake superior remains at 29.9 
inches through sunday night as the high weakens and moves over the 
upper great lakes. pressure increases to 30.2 inches by tuesday 
morning. this ridging begins to break down late tuesday, decreasing 
to 29.9 by thursday afternoon as a weak low tracks from wisconsin to 
the upper great lakes.




lsz263-210800-
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 sat jun 20 2026

.late this afternoon...west winds 5 to 15 knots. patchy fog. a
slight chance of showers. waves calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots becoming west less than
10 knots after midnight, then veering north late. patchy fog.
waves calm to 2 feet. 
.sunday...northeast winds less than 10 knots. patchy fog through
early afternoon. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots diminishing to less
than 10 knots after midnight, then backing north late. 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 less than 10 knots becoming northeast
5 to 15 knots by mid afternoon. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots. a chance of rain
showers. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots. waves calm to 2 feet.
.thursday...north winds less than 10 knots backing west. waves
calm to 2 feet. 

$$