fzus63 kmqt 120202
glfls 
expires:202507120800;;290851

open lake forecast for lake superior
national weather service marquette mi
1002 pm edt fri jul 11 2025

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 29.8 inch trough moves across the lake tonight through saturday 
afternoon as a low over northern ontario deepens to 29.6 inches. 
this low deepens further to 29.4 inches saturday night as it drifts 
northeast towards hudson bay while 30.0 inch high pressure builds 
just south of the great lakes basin. the high maintains strength and 
position on sunday while the low deepens to 29.3 inches over hudson 
bay. on monday, lake superior will be between high pressure of 30.0 
inches over much of the eastern conus and broad 29.8 inch troughing 
over the northern plains. this trough reaches lake superior on 
tuesday and expands over the rest of the great lakes on wednesday.



lsz162-120800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1002 pm edt fri jul 11 2025 /902 pm cdt fri jul 11 2025/

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

$$

fzus63 kmqt 120202
glfls 
expires:202507120800;;290852

open lake forecast for lake superior
national weather service marquette mi
1002 pm edt fri jul 11 2025

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 29.8 inch trough moves across the lake tonight through saturday 
afternoon as a low over northern ontario deepens to 29.6 inches. 
this low deepens further to 29.4 inches saturday night as it drifts 
northeast towards hudson bay while 30.0 inch high pressure builds 
just south of the great lakes basin. the high maintains strength and 
position on sunday while the low deepens to 29.3 inches over hudson 
bay. on monday, lake superior will be between high pressure of 30.0 
inches over much of the eastern conus and broad 29.8 inch troughing 
over the northern plains. this trough reaches lake superior on 
tuesday and expands over the rest of the great lakes on wednesday.



lsz263-120800-
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-
1002 pm edt fri jul 11 2025

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

$$