fzus63 kmqt 302001
glfls 
expires:202607310800;;351154

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu jul 30 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 29.7 inch low pressure will move through ontario tonight and into 
quebec on friday. this will bring a weak 29.9 inch trough over lake 
superior through friday evening. a 30.0 inch high will build over 
james bay on saturday, extending a weak 29.9 inch ridge over the 
lake. ridging over the lake will build to 30.0 inches on sunday and 
linger into monday. a weak trough of 29.9 inches will move through 
the area on tuesday.




lsz162-310800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu jul 30 2026 /301 pm cdt thu jul 30 2026/

.late this afternoon...southwest winds 10 to 20 knots. patchy
smoke. a slight chance of showers and thunderstorms. waves 1 to
3 feet. 
.tonight...west winds 5 to 15 knots backing southwest after
midnight, then veering west late. patchy smoke. a slight chance
of showers and thunderstorms. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southwest in the
afternoon, then veering west late. a chance of showers and a
slight chance of thunderstorms. patchy smoke by mid afternoon.
waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering north late.
patchy smoke through midnight. a slight chance of showers through
midnight. waves calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.saturday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.monday...east winds 5 to 15 knots veering southwest. waves calm
to 2 feet. 
.tuesday...southwest winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202607310800;;351155

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu jul 30 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 29.7 inch low pressure will move through ontario tonight and into 
quebec on friday. this will bring a weak 29.9 inch trough over lake 
superior through friday evening. a 30.0 inch high will build over 
james bay on saturday, extending a weak 29.9 inch ridge over the 
lake. ridging over the lake will build to 30.0 inches on sunday and 
linger into monday. a weak trough of 29.9 inches will move through 
the area on tuesday.




lsz263-310800-
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 thu jul 30 2026

.late this afternoon...southwest winds 10 to 20 knots. patchy
smoke. a chance of showers and a slight chance of thunderstorms.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...southwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then veering west late. patchy smoke. a
slight chance of showers and thunderstorms. waves subsiding to
calm to 2 feet. 
.friday...west winds 5 to 15 knots. patchy smoke. a slight chance
of showers and thunderstorms. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering north late.
patchy smoke. a slight chance of showers. waves calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.saturday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots increasing to 10 to 20 knots.
waves building to 1 to 3 feet. 
.tuesday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$