fzus63 kmqt 120756
glfls 
expires:202604122000;;232933

open lake forecast for lake superior
national weather service marquette mi
356 am edt sun apr 12 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 29.3 inch low developing on the lee of the northern rockies lifts 
northeast through northwestern ontario today before moving into far 
northern quebec by monday morning. another 29.5 inch low takes shape 
over the central plains on monday before lifting through the straits 
of mackinac at 29.6 inches monday night through tuesday morning. 
remnant troughing of around 29.7 to 29.8 inches remains over the 
upper great lakes the rest of the day tuesday before another low 
from the central plains lifts through the upper great lakes at 29.6 
inches wednesday night and thursday.



lsz162-122000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
356 am edt sun apr 12 2026 /256 am cdt sun apr 12 2026/

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

$$

fzus63 kmqt 120756
glfls 
expires:202604122000;;232934

open lake forecast for lake superior
national weather service marquette mi
356 am edt sun apr 12 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 29.3 inch low developing on the lee of the northern rockies lifts 
northeast through northwestern ontario today before moving into far 
northern quebec by monday morning. another 29.5 inch low takes shape 
over the central plains on monday before lifting through the straits 
of mackinac at 29.6 inches monday night through tuesday morning. 
remnant troughing of around 29.7 to 29.8 inches remains over the 
upper great lakes the rest of the day tuesday before another low 
from the central plains lifts through the upper great lakes at 29.6 
inches wednesday night and thursday.



lsz263-122000-
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-
356 am edt sun apr 12 2026

.early this morning...southeast winds 10 to 20 knots. rain
showers likely and a slight chance of thunderstorms. waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet. 
.today...southeast winds 10 to 20 knots veering south late. a
chance of showers and thunderstorms. waves subsiding to 2 to
4 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight. a chance of rain showers and a slight chance of
thunderstorms through midnight. waves subsiding to calm to
2 feet. 
.monday...northwest winds 5 to 15 knots becoming northeast less
than 10 knots in the afternoon, then becoming east 5 to 15 knots
late. a slight chance of rain showers by mid afternoon. waves
calm to 2 feet. 
.monday night...east winds 10 to 20 knots backing northeast after
midnight. rain showers likely and a slight chance of
thunderstorms through midnight, then a chance of rain showers
after midnight. waves building to 2 to 4 feet. 
.tuesday...northeast winds 5 to 15 knots. waves subsiding to 1 to
3 feet. 
.tuesday night...northeast winds 5 to 15 knots. waves building to
2 to 4 feet. 
.wednesday...east winds 5 to 15 knots backing northeast. a chance
of rain showers. waves subsiding to calm to 2 feet, then building
to 1 to 3 feet. 
.thursday...northeast winds 5 to 15 knots becoming east 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
5 to 8 feet occasionally to 10 feet. 

$$