fzus63 kmqt 290201
glfls 
expires:202609290800;;221847

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon sep 28 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 30.0 inch high over lake superior tonight shifts east to the lower 
great lakes by tuesday morning. thereafter, a 29.7 inch trough moves 
into the plains with lake superior remaining between the trough and 
high pressure over the eastern u.s. the trough shifts to the western 
part of the lake by tuesday night as a 29.3 inch low moves from the 
canadian prairies to hudson bay. troughing over lake superior will 
strengthen to 29.6 inches on wednesday before high pressure of 30.3 
inches develops over the central plains thursday night into friday. 
this high moves through the upper great lakes friday night and 
saturday.  




lsz162-290800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt mon sep 28 2026 /901 pm cdt mon sep 28 2026/

.rest of tonight...east winds 5 to 15 knots veering south late.
areas of fog. waves calm to 2 feet. 
.tuesday...south winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. a slight chance of showers through
early afternoon, then showers likely and a slight chance of
thunderstorms by mid afternoon. waves building to 1 to 3 feet. 
.tuesday night...south winds 15 to 25 knots becoming southwest
10 to 20 knots after midnight, then diminishing to 5 to 15 knots
late. a chance of showers through midnight. waves subsiding to
calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots. a slight chance of
showers. waves calm to 2 feet. 
.wednesday night...southwest winds 10 to 20 knots veering
northwest after midnight. waves calm to 2 feet. 
.thursday...west winds 15 to 25 knots. waves building to 1 to
3 feet. 
.thursday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southeast. waves calm
to 2 feet. 
.saturday...south winds 5 to 15 knots becoming west 15 to
25 knots. a chance of showers. waves building to 1 to 3 feet. 

$$

fzus63 kmqt 290201
glfls 
expires:202609290800;;221848

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon sep 28 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 30.0 inch high over lake superior tonight shifts east to the lower 
great lakes by tuesday morning. thereafter, a 29.7 inch trough moves 
into the plains with lake superior remaining between the trough and 
high pressure over the eastern u.s. the trough shifts to the western 
part of the lake by tuesday night as a 29.3 inch low moves from the 
canadian prairies to hudson bay. troughing over lake superior will 
strengthen to 29.6 inches on wednesday before high pressure of 30.3 
inches develops over the central plains thursday night into friday. 
this high moves through the upper great lakes friday night and 
saturday.  




lsz263-290800-
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 mon sep 28 2026

.rest of tonight...east winds 5 to 15 knots becoming southeast
10 to 20 knots after midnight, then veering south late. areas of
fog by midnight. waves calm to 2 feet building to 1 to 3 feet. 
.tuesday...south winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. a chance of showers by mid afternoon.
waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.tuesday night...south winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then veering southwest late. showers
likely through midnight, then a slight chance of showers after
midnight. waves 1 to 3 feet. 
.wednesday...southwest winds 10 to 20 knots. a slight chance of
showers. waves subsiding to calm to 2 feet, then building to 1 to
3 feet. 
.wednesday night...southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. a slight chance of showers. waves
building to 1 to 3 feet. 
.thursday...west winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.thursday night...northwest winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing south. waves calm to
2 feet. 
.saturday...south winds 10 to 20 knots becoming west 20 to
30 knots. a chance of showers. waves building to 3 to 5 feet
occasionally to 7 feet. 

$$