fzus63 kmqt 072002
glfls 
expires:202610080800;;696787

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed oct 7 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...

29.7 inch troughing continues through this evening as the associated 
29.4 inch low tracks eastward across far northern ontario over james 
bay. high pressure then builds in from the canadian prairies and 
northern plains late in the work week, shifting into the ohio river 
valley early friday. this will result in 29.9 inch ridging over lake 
superior on thursday strengthening to 30.1 inches on friday. a 29.4 
inch clipper low then develops off the northern rockies late friday, 
creating a tight pressure gradient over the great lakes as the high 
pressure center remains over the northeast us through saturday. 29.8 
inch troughing moves over the lake sunday morning as troughing 
extends eastward from the southwest us. ridging returns over the 
lake tuesday morning as high pressure builds once more over the 
northern plains. 




lsz162-080800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt wed oct 7 2026 /301 pm cdt wed oct 7 2026/

.late this afternoon...west winds 15 to 25 knots. a slight chance
of showers. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.thursday...west winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. waves subsiding to calm to 2 feet. 
.thursday night...west winds 5 to 15 knots. waves calm to 2 feet.
.friday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.friday night...east winds 10 to 20 knots. waves building to 1 to
3 feet. 
.saturday...southeast winds 20 to 30 knots becoming south gales
to 35 knots by mid afternoon. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.saturday night...southwest gales to 35 knots. waves building to
3 to 6 feet occasionally to 8 feet. 
.sunday...southwest winds 15 to 25 knots veering north. a chance
of showers. waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet. 
.monday...northeast winds 15 to 25 knots backing north. a chance
of rain showers. waves subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 072002
glfls 
expires:202610080800;;696788

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed oct 7 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...

29.7 inch troughing continues through this evening as the associated 
29.4 inch low tracks eastward across far northern ontario over james 
bay. high pressure then builds in from the canadian prairies and 
northern plains late in the work week, shifting into the ohio river 
valley early friday. this will result in 29.9 inch ridging over lake 
superior on thursday strengthening to 30.1 inches on friday. a 29.4 
inch clipper low then develops off the northern rockies late friday, 
creating a tight pressure gradient over the great lakes as the high 
pressure center remains over the northeast us through saturday. 29.8 
inch troughing moves over the lake sunday morning as troughing 
extends eastward from the southwest us. ridging returns over the 
lake tuesday morning as high pressure builds once more over the 
northern plains. 




lsz263-080800-
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 wed oct 7 2026

.late this afternoon...west winds 15 to 25 knots. a slight chance
of showers. waves 3 to 6 feet occasionally to 8 feet, then
subsiding to 3 to 5 feet occasionally to 7 feet. 
.tonight...northwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then becoming west 15 to 25 knots late.
waves subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.thursday...west winds 15 to 25 knots. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.thursday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.friday night...southeast winds 15 to 25 knots. waves building to
1 to 3 feet. 
.saturday...southeast winds 20 to 30 knots becoming south gales
to 35 knots by mid afternoon. waves building to 2 to 4 feet. 
.saturday night...south gales to 40 knots becoming southwest
gales to 35 knots after midnight. waves building to 4 to 7 feet
occasionally to 9 feet. 
.sunday...southwest winds 20 to 30 knots becoming north 15 to
25 knots. a chance of showers. waves subsiding to 2 to 4 feet,
then building to 3 to 6 feet occasionally to 8 feet. 
.monday...north winds 15 to 25 knots increasing to 20 to
30 knots. a chance of rain showers. waves subsiding to 2 to
4 feet. 

$$