fzus63 kmqt 112001
glfls 
expires:202609120800;;288161

open lake forecast for lake superior
national weather service marquette mi
401 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...

30.0 inch ridge is exiting eastward as a 29.6 inch trough moves 
across the northern plains. the trough tracks towards hudson bay by 
this afternoon, bringing 29.8 inch troughing to the lake. a cold 
front and 29.7 inch trough passes through on saturday with ridging 
in its wake reaching 30.0 inches by sunday. this strengthens further 
to 30.2 inches monday. 




lsz162-120800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt fri sep 11 2026 /301 pm cdt fri sep 11 2026/

.late this afternoon...south winds 15 to 25 knots. a slight
chance of showers. waves 1 to 3 feet. 
.tonight...south winds 15 to 25 knots veering southwest after
midnight. a chance of showers and a slight chance of
thunderstorms. waves subsiding to calm to 2 feet, then building
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 3 to 5 feet occasionally to 7 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 112001
glfls 
expires:202609120800;;288162

open lake forecast for lake superior
national weather service marquette mi
401 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...

30.0 inch ridge is exiting eastward as a 29.6 inch trough moves 
across the northern plains. the trough tracks towards hudson bay by 
this afternoon, bringing 29.8 inch troughing to the lake. a cold 
front and 29.7 inch trough passes through on saturday with ridging 
in its wake reaching 30.0 inches by sunday. this strengthens further 
to 30.2 inches monday. 




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-
401 pm edt fri sep 11 2026

.late this afternoon...south winds 15 to 25 knots. a chance of
showers and a slight chance of thunderstorms. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.tonight...south winds 15 to 25 knots veering southwest after
midnight. a chance of showers and a slight chance of
thunderstorms. waves 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 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 calm to 2 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves 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 3 to 6 feet occasionally to 8 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 5 to 8 feet occasionally to
10 feet. 
.tuesday...west gales to 35 knots becoming northwest 20 to
30 knots. waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to calm to 2 feet. 
.wednesday...northwest winds 10 to 20 knots. waves calm to
2 feet. 

$$