fzus63 kmqt 102001
glfls 
expires:202609110800;;235047

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 10 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 ridging remains over the lake through tonight. a trough 
averaging 29.5 inches tracks from the great plains north toward 
hudson bay by friday 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. 




lsz162-110800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu sep 10 2026 /301 pm cdt thu sep 10 2026/

.late this afternoon...south winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...south winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then becoming southwest 15 to 25 knots late.
waves building to 1 to 3 feet. 
.friday...southwest winds 20 to 30 knots backing south late.
waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.friday night...south winds 20 to 30 knots veering southwest
after midnight, then becoming west 15 to 25 knots late. a chance
of showers and 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 by mid afternoon. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.saturday night...west winds 15 to 25 knots becoming northwest
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...north winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.monday...southeast gales to 35 knots veering west. a chance of
showers. showers. waves building to 4 to 7 feet occasionally to
9 feet. 
.tuesday...west gales to 35 knots becoming northwest 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 102001
glfls 
expires:202609110800;;235048

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 10 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 ridging remains over the lake through tonight. a trough 
averaging 29.5 inches tracks from the great plains north toward 
hudson bay by friday 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. 




lsz263-110800-
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 thu sep 10 2026

.late this afternoon...south winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...south winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then becoming southwest 20 to 30 knots late.
waves building to 2 to 4 feet. 
.friday...southwest winds to 30 knots with a few gale force gusts
to 35 knots possible diminishing to 20 to 30 knots late. waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
1 to 3 feet. 
.friday night...south winds 20 to 30 knots veering southwest
after midnight. a slight chance of showers through midnight. a
chance of thunderstorms. showers after midnight. waves building
to 2 to 4 feet. 
.saturday...west winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. a slight chance of showers through
early afternoon. waves building to 3 to 6 feet occasionally to
8 feet. 
.saturday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. waves subsiding to 2 to 4 feet. 
.sunday...northwest winds 15 to 25 knots becoming west 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots backing southeast
after midnight. waves calm to 2 feet. 
.monday...southeast gales to 35 knots becoming south gales to
40 knots. showers. waves building to 5 to 8 feet occasionally to
10 feet. 
.tuesday...west gales to 40 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. 

$$