fzus63 kmqt 180801
glfls 
expires:202607182000;;164998

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat jul 18 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 moves to afternoon. weak ridging of around 30.0 
inches returns to the great lakes this evening 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. then a 30.1 inch ridge descends southeast over 
the midwest tuesday through wednesday night. 




lsz162-182000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt sat jul 18 2026 /300 am cdt sat jul 18 2026/

...dense smoke advisory in effect until 6 am edt /5 am cdt/ early
this morning...

.early this morning...northwest winds 10 to 20 knots. waves calm
to 2 feet. 
.today...northwest winds 10 to 20 knots becoming southwest 5 to
15 knots in the afternoon. patchy smoke. waves calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots becoming north less than
10 knots after midnight, then backing southwest late. patchy
smoke. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots backing south late.
patchy smoke. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. patchy smoke through midnight. a slight
chance of showers through midnight, then showers likely and a
slight chance of thunderstorms after midnight. waves calm to
2 feet. 
.monday...southwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. a chance of showers through early
afternoon. a chance of thunderstorms. showers likely by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.monday night...west winds 15 to 25 knots. a chance of showers
through midnight. waves subsiding to 1 to 3 feet. 
.tuesday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots veering west. waves
calm to 2 feet. 

$$

fzus63 kmqt 180801
glfls 
expires:202607182000;;164999

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat jul 18 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 moves to afternoon. weak ridging of around 30.0 
inches returns to the great lakes this evening 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. then a 30.1 inch ridge descends southeast over 
the midwest tuesday through wednesday night. 




lsz263-182000-
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 sat jul 18 2026

...dense smoke advisory in effect until 6 am edt early this
morning...

.early this morning...northwest winds 10 to 20 knots. patchy
smoke. waves calm to 2 feet. 
.today...northwest winds 10 to 20 knots becoming west 5 to
15 knots in the afternoon, then backing southwest late. smoke
through early afternoon, then patchy smoke by mid afternoon. a
slight chance of showers by mid afternoon. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots backing south after midnight.
smoke. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots backing south late.
smoke. waves calm to 2 feet. 
.sunday night...south winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. areas of smoke through midnight. a
chance of showers and a slight chance of thunderstorms. waves
building to 2 to 4 feet. 
.monday...southwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. showers likely. waves building to 3 to
6 feet occasionally to 8 feet. 
.monday night...west winds 15 to 25 knots. a chance of showers.
waves subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 10 to 20 knots becoming west 5 to
15 knots. waves calm to 2 feet. 

$$