fzus63 kmqt 282002
glfls 
expires:202609290800;;209611

open lake forecast for lake superior
national weather service marquette mi
401 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 30.1 inch high pressure over lake superior this afternoon heads 
toward the lower great lakes tonight. thereafter a 29.7 inch trough 
builds 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 could strengthen to 29.6 inches wednesday night 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-
401 pm edt mon sep 28 2026 /301 pm cdt mon sep 28 2026/

.late this afternoon...east winds 5 to 15 knots. areas of fog.
waves calm to 2 feet. 
.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, then subsiding to calm to 2 feet. 
.thursday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves 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 282002
glfls 
expires:202609290800;;209612

open lake forecast for lake superior
national weather service marquette mi
401 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 30.1 inch high pressure over lake superior this afternoon heads 
toward the lower great lakes tonight. thereafter a 29.7 inch trough 
builds 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 could strengthen to 29.6 inches wednesday night 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-
401 pm edt mon sep 28 2026

.late this afternoon...east winds 5 to 15 knots. areas of fog.
waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight, then veering south late. areas of fog
through midnight. waves 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. 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 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. 

$$