fzus63 kmqt 140201
glfls 
expires:202604140800;;326940

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt mon apr 13 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 29.5 inch low over the central plains lifts through northern lower 
michigan at 29.6 inches tuesday morning. following this, weak 
ridging of around 29.8 to 29.9 inches moves back over lake superior 
from northern ontario tuesday through wednesday before another low 
from the central plains lifts through the straits of mackinac at 
29.6 inches on thursday morning. ridging increases to 29.8 inches 
over lake superior later in the day thursday before troughing of 
29.4 to 29.6 inches moves across the lake friday through saturday.



lsz162-140800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt mon apr 13 2026 /900 pm cdt mon apr 13 2026/

.rest of tonight...northeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight, then diminishing to 10 to 20 knots
late. patchy fog. a chance of rain showers. waves calm to 2 feet
building to 2 to 4 feet. 
.tuesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots late. patchy fog. a chance of rain showers. waves
subsiding to calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots backing north
after midnight, then veering northeast late. waves calm to
2 feet. 
.wednesday...east winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots. a slight chance
of rain showers. waves calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots veering east by mid
afternoon. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.friday...east winds 10 to 20 knots becoming west 20 to 30 knots.
rain showers. waves building to 5 to 8 feet occasionally to
10 feet. 
.saturday...west winds 20 to 30 knots becoming northwest gales to
35 knots. a chance of rain showers. a chance of snow showers.
waves subsiding to 4 to 7 feet occasionally to 9 feet, then
building to 6 to 9 feet occasionally to 11 feet. 

$$