fzus63 kmqt 120201
glfls 
expires:202609120800;;300674

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt fri sep 11 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 29.6 inch trough extends over western lake superior this evening 
from a 29.2 inch low over hudson bay as a 30.0 inch high exits east 
into new england. the trough crosses the lake through saturday 
afternoon accompanied by a cold front. 30.0 inch ridging builds back 
in from the northern plains on sunday and strengthens to 30.2 inches 
on monday. a 29.5 to 29.7 inch low crosses northern ontario on 
tuesday. 




lsz162-120800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt fri sep 11 2026 /901 pm cdt fri sep 11 2026/

.rest of tonight...south winds 15 to 25 knots veering southwest
after midnight. showers by midnight. a slight chance of
thunderstorms. a chance of showers after midnight. waves 1 to
3 feet building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.saturday...west winds 15 to 25 knots increasing to 20 to
30 knots late. waves 1 to 3 feet. 
.saturday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.sunday...northwest winds 10 to 20 knots backing west by mid
afternoon. waves calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots becoming north less
than 10 knots after midnight. waves calm to 2 feet. 
.monday...southeast winds 5 to 15 knots increasing to 20 to
30 knots by mid afternoon. showers likely by mid afternoon. waves
building to 1 to 3 feet. 
.monday night...south gales to 35 knots veering southwest after
midnight. showers through midnight. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...west winds 20 to 30 knots becoming northwest 10 to
20 knots. waves subsiding to calm to 2 feet. 
.wednesday...north winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 120201
glfls 
expires:202609120800;;300675

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt fri sep 11 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 29.6 inch trough extends over western lake superior this evening 
from a 29.2 inch low over hudson bay as a 30.0 inch high exits east 
into new england. the trough crosses the lake through saturday 
afternoon accompanied by a cold front. 30.0 inch ridging builds back 
in from the northern plains on sunday and strengthens to 30.2 inches 
on monday. a 29.5 to 29.7 inch low crosses northern ontario on 
tuesday. 




lsz263-120800-
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 pm edt fri sep 11 2026

.rest of tonight...south winds 15 to 25 knots veering southwest
after midnight. a chance of showers and a slight chance of
thunderstorms. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...west winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. a slight chance of showers through
early afternoon. waves building to 3 to 6 feet occasionally to
8 feet. 
.saturday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots late. waves subsiding to 2 to 4 feet. 
.sunday...northwest winds 10 to 20 knots backing west by mid
afternoon. waves subsiding to 1 to 3 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...south winds 15 to 25 knots becoming southeast 20 to
30 knots by mid afternoon. a chance of showers by mid afternoon.
waves building to 1 to 3 feet. 
.monday night...south gales to 35 knots veering southwest after
midnight. showers through midnight, then a chance of showers
after midnight. waves building to 4 to 7 feet occasionally to
9 feet. 
.tuesday...west gales to 35 knots becoming northwest 20 to
30 knots. waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to calm to 2 feet. 
.wednesday...northwest winds 10 to 20 knots. waves calm to
2 feet. 

$$