fzus63 kmqt 082001
glfls 
expires:202608090800;;843571

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 8 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...

upper michigan is situated between a 29.6 inch northern quebec low 
and a 30.0 inch high centered over northern illinois. this will 
drive weak and ill-defined 29.9 inch ridging/troughing over lake 
superior through monday night as the high moves southeast. weak 
ridging of 30.0 inches, extending between a 30.2 inch bermuda high 
and 30.0 inch ridging over the western canadian provinces, returns 
for monday and tuesday before decreasing to 29.9 inches tuesday 
night. a 29.8 inch trough moves over the lake wednesday before 
ridging of 30.0 inches returns on thursday from the canadian prairie.




lsz162-090800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sat aug 8 2026 /301 pm cdt sat aug 8 2026/

.late this afternoon...southwest winds 15 to 25 knots. waves 1 to
3 feet. 
.tonight...southwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight, then veering northwest late. a chance of
showers and a slight chance of thunderstorms. waves subsiding to
calm to 2 feet. 
.sunday...west winds 5 to 15 knots backing south in the
afternoon. a slight chance of showers through early afternoon.
waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.monday night...west winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.tuesday...north winds 5 to 15 knots veering south by mid
afternoon. waves calm to 2 feet. 
.tuesday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 082001
glfls 
expires:202608090800;;843572

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 8 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...

upper michigan is situated between a 29.6 inch northern quebec low 
and a 30.0 inch high centered over northern illinois. this will 
drive weak and ill-defined 29.9 inch ridging/troughing over lake 
superior through monday night as the high moves southeast. weak 
ridging of 30.0 inches, extending between a 30.2 inch bermuda high 
and 30.0 inch ridging over the western canadian provinces, returns 
for monday and tuesday before decreasing to 29.9 inches tuesday 
night. a 29.8 inch trough moves over the lake wednesday before 
ridging of 30.0 inches returns on thursday from the canadian prairie.




lsz263-090800-
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 aug 8 2026

.late this afternoon...southwest winds 15 to 25 knots. waves 2 to
4 feet. 
.tonight...southwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight. a chance of showers. a slight chance of
thunderstorms after midnight. waves subsiding to calm to 2 feet. 
.sunday...west winds 5 to 15 knots veering north in the
afternoon, then backing southwest late. a slight chance of
showers through early afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots diminishing to less
than 10 knots after midnight, then veering west late. waves calm
to 2 feet. 
.monday...west winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.tuesday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.tuesday night...southwest winds 5 to 15 knots becoming west less
than 10 knots after midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.thursday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$