fzus63 kmqt 122001
glfls 
expires:202604130800;;260308

open lake forecast for lake superior
national weather service marquette mi
400 pm 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 29.4 inch low over minnesota will lift northeast through 
northwestern lake superior this evening before moving into far 
northern quebec by monday morning. another 29.5 inch low then takes 
shape over the central plains on monday before lifting through the 
straits of mackinac at 29.6 inches tuesday morning. weak ridging of 
29.9 to 30.0 inches moves back over lake superior from northern 
ontario tuesday evening through wednesday before another low from 
the central plains lifts through the upper great lakes at 29.6 
inches on thursday. behind this low, yet another low at around 29.5 
inches moves into lake superior on friday into saturday.



lsz162-130800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt sun apr 12 2026 /300 pm cdt sun apr 12 2026/

...dense fog advisory in effect until 11 am edt /10 am cdt/
monday...

.late this afternoon...northeast winds 10 to 20 knots. patchy
dense fog. a chance of rain showers and a slight chance of
thunderstorms. waves calm to 2 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. areas of
dense fog through midnight, then patchy fog after midnight. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.monday...west winds 5 to 15 knots veering northeast in the
afternoon, then veering east late. a slight chance of rain
showers by mid afternoon. waves calm to 2 feet. 
.monday night...northeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight, then diminishing to 10 to 20 knots
late. rain showers 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. a slight chance of rain showers
through early afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.wednesday...east winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots. a chance of
rain showers. waves building to 1 to 3 feet. 
.thursday...northeast winds 5 to 15 knots increasing to 10 to
20 knots. a chance of rain showers. waves subsiding to calm to
2 feet, then building to 3 to 5 feet occasionally to 7 feet. 
.friday...northeast winds 15 to 25 knots becoming northwest 20 to
30 knots. a chance of rain showers, then rain showers likely,
possibly mixed with snow showers. waves building to 3 to 6 feet
occasionally to 8 feet. 

$$

fzus63 kmqt 122001
glfls 
expires:202604130800;;260309

open lake forecast for lake superior
national weather service marquette mi
400 pm 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 29.4 inch low over minnesota will lift northeast through 
northwestern lake superior this evening before moving into far 
northern quebec by monday morning. another 29.5 inch low then takes 
shape over the central plains on monday before lifting through the 
straits of mackinac at 29.6 inches tuesday morning. weak ridging of 
29.9 to 30.0 inches moves back over lake superior from northern 
ontario tuesday evening through wednesday before another low from 
the central plains lifts through the upper great lakes at 29.6 
inches on thursday. behind this low, yet another low at around 29.5 
inches moves into lake superior on friday into saturday.



lsz263-130800-
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-
400 pm edt sun apr 12 2026

...dense fog advisory in effect until 11 am edt monday...

.late this afternoon...south winds 10 to 20 knots. patchy fog. a
chance of showers and thunderstorms. waves 2 to 4 feet. 
.tonight...southwest winds 10 to 20 knots veering west after
midnight. a chance of rain showers and a slight chance of
thunderstorms through midnight. areas of dense fog. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.monday...west winds 5 to 15 knots becoming northwest less than
10 knots in the afternoon, then becoming east 5 to 15 knots late.
waves subsiding to calm to 2 feet. 
.monday night...east winds 10 to 20 knots backing northeast late.
a slight chance of thunderstorms through midnight. rain showers.
waves building to 2 to 4 feet. 
.tuesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. a slight chance of rain showers
through early afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots diminishing to
less than 10 knots after midnight. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots. waves calm to 2 feet.
.wednesday night...east winds 5 to 15 knots backing northeast
after midnight. a chance of rain showers. waves building to 1 to
3 feet. 
.thursday...northeast winds 5 to 15 knots becoming east 10 to
20 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 
.friday...east winds 15 to 25 knots becoming northwest 20 to
30 knots. a chance of rain showers, then rain showers likely,
possibly mixed with snow showers. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 

$$