fzus63 kmqt 221401
glfls 
expires:202603222000;;113563

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sun mar 22 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 30.4 inch ridge builds over the great lakes today through monday. 
a clipper low around 29.9 inches tracks across northern ontario and 
briefly extends a 30.1 inch trough over lake superior tuesday 
morning. 30.3 inch ridging quickly builds back in on tuesday night 
and remains until wednesday morning. another clipper low around 29.7 
inches phases with a shortwave low lifting off of the northern 
rockies on wednesday, bringing troughing of at least 29.8 inches 
back across lake superior by thursday morning.



lsz162-222000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt sun mar 22 2026 /900 am cdt sun mar 22 2026/

.rest of today...northeast winds 15 to 25 knots diminishing to
10 to 20 knots in the afternoon, then becoming east 5 to 15 knots
late. freezing spray by late morning. waves 4 to 7 feet
occasionally to 9 feet subsiding to 3 to 5 feet occasionally to
7 feet. 
.tonight...south winds 5 to 15 knots veering west after midnight.
waves subsiding to calm to 2 feet. 
.monday...west winds 5 to 15 knots backing south late. waves calm
to 2 feet. 
.monday night...south winds 10 to 20 knots veering west after
midnight. a chance of rain showers, possibly mixed with snow
after midnight. waves calm to 2 feet. 
.tuesday...north winds 5 to 15 knots veering east by mid
afternoon. waves calm to 2 feet. 
.tuesday night...east winds 10 to 20 knots becoming northeast
15 to 25 knots after midnight. waves building to 2 to 4 feet. 
.wednesday...east winds 15 to 25 knots. a chance of snow showers.
rain showers likely. waves building to 3 to 6 feet occasionally
to 8 feet. 
.thursday...northwest winds 15 to 25 knots veering north. a
chance of rain showers. a chance of snow showers. waves subsiding
to 2 to 4 feet, then building to 3 to 5 feet occasionally to
7 feet. 

$$

fzus63 kmqt 221401
glfls 
expires:202603222000;;113564

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sun mar 22 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 30.4 inch ridge builds over the great lakes today through monday. 
a clipper low around 29.9 inches tracks across northern ontario and 
briefly extends a 30.1 inch trough over lake superior tuesday 
morning. 30.3 inch ridging quickly builds back in on tuesday night 
and remains until wednesday morning. another clipper low around 29.7 
inches phases with a shortwave low lifting off of the northern 
rockies on wednesday, bringing troughing of at least 29.8 inches 
back across lake superior by thursday morning.



lsz263-222000-
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-
1000 am edt sun mar 22 2026

.rest of today...northeast winds 15 to 25 knots diminishing to
5 to 15 knots. freezing spray. waves 5 to 8 feet occasionally to
10 feet subsiding to 3 to 5 feet occasionally to 7 feet. 
.tonight...north winds 5 to 15 knots becoming west less than
10 knots after midnight, then increasing to 5 to 15 knots late.
waves subsiding to calm to 2 feet. 
.monday...northwest winds 5 to 15 knots backing southwest late.
waves calm to 2 feet. 
.monday night...south winds 15 to 25 knots veering southwest
after midnight. a chance of rain showers, possibly mixed with
snow after midnight. waves building to 2 to 4 feet. 
.tuesday...north winds 5 to 15 knots veering northeast by mid
afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...east winds 10 to 20 knots. freezing spray after
midnight. waves building to 3 to 5 feet occasionally to 7 feet. 
.wednesday...east winds 10 to 20 knots increasing to 15 to
25 knots. freezing spray. a chance of snow showers. a chance of
rain showers. waves building to 3 to 6 feet occasionally to
8 feet. 
.thursday...north winds 20 to 30 knots. a chance of rain and snow
showers. freezing spray. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 

$$