fzus63 kmqt 170801
glfls 
expires:202607172000;;108838

open lake forecast for lake superior
national weather service marquette mi
400 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... 

30.1 inch high pressure persists over lake superior into friday 
while gradually shifting east towards the st. lawrence seaway. low 
pressure passing through the northern plains looks to traverse the 
the lake at around 29.7 inches friday evening into saturday morning. 
weak ridging of 29.9 to 30.0 inches returns late saturday and 
remains through sunday. a strong low ranging from 29.3 to 29.5 
inches over northern ontario looks to bring 29.6 inch troughing over 
lake superior on monday.




lsz162-172000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt fri jul 17 2026 /300 am cdt fri jul 17 2026/

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

.early this morning...northeast winds 5 to 15 knots. smoke. a
slight chance of showers and thunderstorms. waves calm to 2 feet.
.today...northeast winds 5 to 15 knots veering east in the
afternoon. smoke. a chance of showers and thunderstorms. 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 170801
glfls 
expires:202607172000;;108839

open lake forecast for lake superior
national weather service marquette mi
400 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... 

30.1 inch high pressure persists over lake superior into friday 
while gradually shifting east towards the st. lawrence seaway. low 
pressure passing through the northern plains looks to traverse the 
the lake at around 29.7 inches friday evening into saturday morning. 
weak ridging of 29.9 to 30.0 inches returns late saturday and 
remains through sunday. a strong low ranging from 29.3 to 29.5 
inches over northern ontario looks to bring 29.6 inch troughing 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-
400 am edt fri jul 17 2026

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

.early this morning...southeast winds 5 to 15 knots. smoke. a
slight chance of showers and thunderstorms. waves calm to 2 feet.
.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. 

$$