fzus63 kmqt 221401
glfls 
expires:202608222000;;168691

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sat aug 22 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...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is 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 the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz162-222000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt sat aug 22 2026 /900 am cdt sat aug 22 2026/

.rest of today...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...north winds 10 to 20 knots. waves calm to 2 feet. 
.sunday...north winds 5 to 15 knots veering south in the
afternoon. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots becoming northwest less
than 10 knots after midnight. waves calm to 2 feet. 
.monday...north winds less than 10 knots becoming southeast 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots becoming southeast less
than 10 knots after midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots veering west. a chance of
showers and thunderstorms. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 221401
glfls 
expires:202608222000;;168692

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sat aug 22 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...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is 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 the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz263-222000-
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-
1000 am edt sat aug 22 2026

.rest of today...northwest winds 5 to 15 knots increasing to
10 to 20 knots in the afternoon, then diminishing to 5 to
15 knots late. waves calm to 2 feet. 
.tonight...north winds 10 to 20 knots. waves building to 2 to
4 feet. 
.sunday...north winds 10 to 20 knots becoming west 5 to 15 knots
late. waves subsiding to calm to 2 feet. 
.sunday night...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.monday...north winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots veering southwest. a chance
of showers. a chance of thunderstorms. showers likely. waves calm
to 2 feet. 
.wednesday...west winds 10 to 20 knots becoming northwest 5 to
15 knots. a chance of showers. waves calm to 2 feet. 

$$