fzus63 kmqt 171401
glfls 
expires:202607172000;;121605

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri jul 17 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... 

30.0 inch high pressure shifts east of lake superior this afternoon. 
a 29.7 inch low crosses the lake tonight and moves to southern 
quebec by saturday afternoon. weak ridging of around 30.0 inches 
returns to the great lakes late saturday and persists through 
sunday. a strong low ranging from 29.1 to 29.4 inches over northern 
ontario looks to bring troughing of around 29.5 inches over lake 
superior on monday.




lsz162-172000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt fri jul 17 2026 /901 am cdt fri jul 17 2026/

...dense smoke advisory in effect until 8 pm edt /7 pm cdt/ this
evening...

.rest of today...east winds 5 to 15 knots. smoke. a chance of
showers. a slight chance of thunderstorms by mid afternoon. waves
calm to 2 feet. 
.tonight...west winds 10 to 20 knots veering northwest late. a
slight chance of showers and thunderstorms through midnight.
areas of smoke. waves calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots backing southwest in
the afternoon. areas of smoke. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots becoming south less
than 10 knots after midnight. areas of smoke through midnight.
waves calm to 2 feet. 
.sunday...south winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...south winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. a chance of thunderstorms. showers
likely after midnight. waves calm to 2 feet. 
.monday...southwest winds 20 to 30 knots veering west. a chance
of showers and thunderstorms. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.tuesday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 171401
glfls 
expires:202607172000;;121606

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri jul 17 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... 

30.0 inch high pressure shifts east of lake superior this afternoon. 
a 29.7 inch low crosses the lake tonight and moves to southern 
quebec by saturday afternoon. weak ridging of around 30.0 inches 
returns to the great lakes late saturday and persists through 
sunday. a strong low ranging from 29.1 to 29.4 inches over northern 
ontario looks to bring troughing of around 29.5 inches over lake 
superior on monday.




lsz263-172000-
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-
1001 am edt fri jul 17 2026

...dense smoke advisory in effect until 8 pm edt this evening...

.rest of today...south winds 5 to 15 knots backing east late.
smoke. a chance of showers and thunderstorms. waves calm to
2 feet. 
.tonight...west winds 5 to 15 knots veering northwest late. areas
of smoke. a chance of thunderstorms through midnight. a chance of
showers. waves calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots backing southwest late.
smoke. waves building to 1 to 3 feet, then subsiding to calm to
2 feet. 
.saturday night...west winds 5 to 15 knots backing south after
midnight. areas of smoke through midnight. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.sunday night...south winds 10 to 20 knots becoming southwest
20 to 30 knots after midnight. showers likely and a chance of
thunderstorms after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.monday...southwest winds 20 to 30 knots veering west. a chance
of showers and thunderstorms. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...northwest gales to 35 knots diminishing to 10 to
20 knots. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 1 to 3 feet. 

$$