fzus63 kmqt 071401
glfls 
expires:202604072000;;979565

open lake forecast for lake superior
national weather service marquette mi
1000 am edt tue apr 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...

a strong 30.6 inch high pressure traverses the great lakes today, 
reaching new england by wednesday afternoon. meanwhile, a 29.5 inch 
low organizes along the montana/saskatchewan border today, moving 
over the dakotas tonight before moving north of the lake wednesday 
night through thursday morning. high pressure of 30.4 inches then 
moves over the upper great lakes on friday, eventually building to 
30.5 inches over the lower great lakes on saturday. on sunday, low 
pressure develops in the lee of the northern rockies while the 30.5 
inch high pushes off of the eastern seaboard into the atlantic.



lsz162-072000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt tue apr 7 2026 /900 am cdt tue apr 7 2026/

.rest of today...west winds 5 to 15 knots backing southwest in
the afternoon. waves calm to 2 feet building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
a chance of snow showers, possibly mixed with rain after
midnight. waves building to 2 to 4 feet. 
.wednesday...south winds 10 to 20 knots backing southeast in the
afternoon, then veering southwest late. snow showers likely
through early afternoon. rain showers. a slight chance of snow
showers by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.wednesday night...southwest winds 15 to 25 knots becoming west
20 to 30 knots after midnight. a slight chance of rain showers
through midnight. waves building to 3 to 6 feet occasionally to
8 feet. 
.thursday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.thursday night...west winds 5 to 15 knots veering northwest
after midnight. waves subsiding to calm to 2 feet. 
.friday...southwest winds 5 to 15 knots veering west. waves calm
to 2 feet. 
.saturday...east winds 5 to 15 knots becoming southeast 10 to
20 knots. rain showers likely. waves building to 2 to 4 feet. 

$$

fzus63 kmqt 071401
glfls 
expires:202604072000;;979566

open lake forecast for lake superior
national weather service marquette mi
1000 am edt tue apr 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...

a strong 30.6 inch high pressure traverses the great lakes today, 
reaching new england by wednesday afternoon. meanwhile, a 29.5 inch 
low organizes along the montana/saskatchewan border today, moving 
over the dakotas tonight before moving north of the lake wednesday 
night through thursday morning. high pressure of 30.4 inches then 
moves over the upper great lakes on friday, eventually building to 
30.5 inches over the lower great lakes on saturday. on sunday, low 
pressure develops in the lee of the northern rockies while the 30.5 
inch high pushes off of the eastern seaboard into the atlantic.



lsz263-072000-
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-
1000 am edt tue apr 7 2026

.rest of today...west winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then backing southwest late. waves
calm to 2 feet building to 2 to 4 feet. 
.tonight...southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight. a chance of snow showers, possibly mixed
with rain after midnight. waves subsiding to calm to 2 feet, then
building to 3 to 5 feet occasionally to 7 feet. 
.wednesday...south winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. snow showers likely, possibly mixed
with rain showers through early afternoon, then rain showers,
possibly mixed with snow by mid afternoon. waves building to 3 to
6 feet occasionally to 8 feet. 
.wednesday night...southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of rain showers through
midnight. waves building to 6 to 9 feet occasionally to 11 feet. 
.thursday...west winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.thursday night...west winds 5 to 15 knots becoming northwest
less than 10 knots after midnight. waves subsiding to calm to
2 feet. 
.friday...west winds 5 to 15 knots backing southwest. waves calm
to 2 feet. 
.saturday...south winds 5 to 15 knots becoming southeast 15 to
25 knots. rain showers likely. waves building to 3 to 5 feet
occasionally to 7 feet. 

$$