fzus63 kmqt 191401
glfls 
expires:202608192000;;993663

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed aug 19 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 over the canadian prairies and northern 
plains moves into the upper great lakes. this high then expands into 
the rest of the great lakes by tomorrow as it strengthens to 30.1 
inches. friday into the weekend, a low pressure of around 29.8 
inches transits across northern ontario, bringing 29.9 inch 
troughing over lake superior friday into saturday. this is quickly 
followed by 30.1 inch ridging for the latter part of the weekend 
into early next week via a 30.2 inch parent high from canada.




lsz162-192000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt wed aug 19 2026 /901 am cdt wed aug 19 2026/

.rest of today...west winds 5 to 15 knots backing southwest in
the afternoon. waves calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots backing northeast after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet. 
.thursday...east winds 5 to 15 knots. a chance of showers. a
slight chance of thunderstorms by mid afternoon. waves calm to
2 feet. 
.thursday night...east winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. showers likely and a slight chance
of thunderstorms through midnight, then a slight chance of
showers after midnight. waves calm to 2 feet. 
.friday...northeast winds 5 to 15 knots veering southwest by mid
afternoon. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots veering north. waves
calm to 2 feet. 
.sunday...north winds 5 to 15 knots veering northeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 191401
glfls 
expires:202608192000;;993664

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed aug 19 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 over the canadian prairies and northern 
plains moves into the upper great lakes. this high then expands into 
the rest of the great lakes by tomorrow as it strengthens to 30.1 
inches. friday into the weekend, a low pressure of around 29.8 
inches transits across northern ontario, bringing 29.9 inch 
troughing over lake superior friday into saturday. this is quickly 
followed by 30.1 inch ridging for the latter part of the weekend 
into early next week via a 30.2 inch parent high from canada.




lsz263-192000-
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 wed aug 19 2026

.rest of today...west winds 5 to 15 knots backing southwest late.
waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots becoming east less than
10 knots late. waves calm to 2 feet. 
.thursday...east winds less than 10 knots becoming southeast 5 to
15 knots in the afternoon, then backing east late. a chance of
showers. a slight chance of thunderstorms by mid afternoon. waves
calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots backing east
after midnight. a slight chance of thunderstorms through
midnight. a chance of showers. waves calm to 2 feet. 
.friday...northeast winds 5 to 15 knots backing north by mid
afternoon. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...northwest winds 10 to 20 knots veering north. waves
calm to 2 feet. 
.sunday...north winds 10 to 20 knots becoming southeast 5 to
15 knots. waves calm to 2 feet. 

$$