fzus63 kmqt 031957
glfls 
expires:202605040800;;962667

open lake forecast for lake superior
national weather service marquette mi
357 pm edt sun may 3 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 29.6 inch trough moves over lake superior today before lifting 
into northern ontario. a deepening 29.3 inch low digs over the 
canadian prairies tonight and then deepens to 29.1 inches over 
northern ontario on monday. the low lifts into james bay by monday 
evening as 30.1 inch ridging builds just to the east of the canadian 
rockies. as the high pressure ridging shifts to the canadian 
prairies tuesday and wednesday, the now-29.2 inch low continues 
lifting into far northern quebec. thursday into friday, the weather 
pattern becomes nebulous as major pressure systems remain far away 
from the upper great lakes.



lsz162-040800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
357 pm edt sun may 3 2026 /257 pm cdt sun may 3 2026/

.late this afternoon...southwest winds 10 to 20 knots. waves calm
to 2 feet. 
.tonight...southwest winds 10 to 20 knots increasing to 15 to
25 knots after midnight. a chance of rain showers after midnight.
waves building to 3 to 6 feet occasionally to 8 feet. 
.monday...west winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon, then diminishing to 15 to 25 knots late. a
chance of rain showers through early afternoon. waves subsiding
to 3 to 5 feet occasionally to 7 feet. 
.monday night...west winds 15 to 25 knots. waves subsiding to
calm to 2 feet. 
.tuesday...west winds 10 to 20 knots. waves calm to 2 feet. 
.tuesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...west winds 10 to 20 knots becoming southwest 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...west winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...southwest winds 5 to 15 knots veering northwest.
waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 031957
glfls 
expires:202605040800;;962668

open lake forecast for lake superior
national weather service marquette mi
357 pm edt sun may 3 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 29.6 inch trough moves over lake superior today before lifting 
into northern ontario. a deepening 29.3 inch low digs over the 
canadian prairies tonight and then deepens to 29.1 inches over 
northern ontario on monday. the low lifts into james bay by monday 
evening as 30.1 inch ridging builds just to the east of the canadian 
rockies. as the high pressure ridging shifts to the canadian 
prairies tuesday and wednesday, the now-29.2 inch low continues 
lifting into far northern quebec. thursday into friday, the weather 
pattern becomes nebulous as major pressure systems remain far away 
from the upper great lakes.



lsz263-040800-
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-
357 pm edt sun may 3 2026

.late this afternoon...west winds 5 to 15 knots. waves 1 to
3 feet. 
.tonight...southwest winds 5 to 15 knots increasing to 20 to
30 knots. a slight chance of rain showers after midnight. waves
building to 4 to 7 feet occasionally to 9 feet. 
.monday...southwest winds 20 to 30 knots veering west in the
afternoon, then diminishing to 15 to 25 knots late. a chance of
rain showers through early afternoon. waves building to 5 to
8 feet occasionally to 10 feet. 
.monday night...west winds 15 to 25 knots diminishing to 10 to
20 knots late. waves subsiding to 2 to 4 feet. 
.tuesday...west winds 10 to 20 knots. waves subsiding to 1 to
3 feet. 
.tuesday night...west winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.wednesday night...west winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...west winds 5 to 15 knots. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$