fzus63 kmqt 252001
glfls 
expires:202604260800;;514675

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat apr 25 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...

ridging slowly rises over lake superior to 30.1 inches by sunday 
morning as 30.4 inch high pressure over northern quebec builds. the 
pattern remains stable over lake superior on sunday while a 29.3 
inch colorado low develops. throughout monday, this low moves 
northeast, arriving in wisconsin monday night. the low then crosses 
lake superior tuesday morning, reaching james bay tuesday night. in 
the wake of the low, 30.2 inch high pressure builds over the 
canadian prairie, sending 30.1 inch high pressure over the lake 
wednesday. this high approaches the great lakes slowly thursday.



lsz162-260800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sat apr 25 2026 /301 pm cdt sat apr 25 2026/

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...northeast winds 5 to 15 knots. patchy fog. a chance of
rain showers. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. patchy fog through early afternoon. a
chance of rain showers. waves calm to 2 feet. 
.sunday night...northeast winds 10 to 20 knots. a slight chance
of rain showers after midnight. waves building to 2 to 4 feet. 
.monday...northeast winds 15 to 25 knots veering east by mid
afternoon. a chance of rain showers through early afternoon, then
rain showers and a slight chance of thunderstorms by mid
afternoon. waves building to 3 to 6 feet occasionally to 8 feet. 
.monday night...northeast winds 15 to 25 knots becoming north
20 to 30 knots after midnight. rain showers. waves building to
4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...northwest winds 20 to 30 knots backing west by mid
afternoon. a chance of rain showers through early afternoon.
waves subsiding to 2 to 4 feet. 
.tuesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots veering north. waves
calm to 2 feet. 

$$

fzus63 kmqt 252001
glfls 
expires:202604260800;;514676

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat apr 25 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...

ridging slowly rises over lake superior to 30.1 inches by sunday 
morning as 30.4 inch high pressure over northern quebec builds. the 
pattern remains stable over lake superior on sunday while a 29.3 
inch colorado low develops. throughout monday, this low moves 
northeast, arriving in wisconsin monday night. the low then crosses 
lake superior tuesday morning, reaching james bay tuesday night. in 
the wake of the low, 30.2 inch high pressure builds over the 
canadian prairie, sending 30.1 inch high pressure over the lake 
wednesday. this high approaches the great lakes slowly thursday.



lsz263-260800-
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 sat apr 25 2026

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...east winds 5 to 15 knots. a slight chance of rain
showers. patchy fog after midnight. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots. patchy fog through early
afternoon. a chance of rain showers. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots veering east after
midnight. waves building to 1 to 3 feet. 
.monday...east winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. a chance of rain showers through early
afternoon, then rain showers likely and a slight chance of
thunderstorms by mid afternoon. waves building to 5 to 8 feet
occasionally to 10 feet. 
.monday night...east winds 20 to 30 knots becoming north 15 to
25 knots after midnight. rain showers. waves building to 7 to
10 feet occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.tuesday...west winds 20 to 30 knots. a chance of rain showers
through early afternoon. waves subsiding to 4 to 8 feet
occasionally to 10 feet. 
.tuesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...west winds 5 to 15 knots veering northwest. waves
subsiding to calm to 2 feet. 
.thursday...north winds 5 to 15 knots. waves calm to 2 feet. 

$$