fzus63 kmqt 131401
glfls 
expires:202604132000;;299238

open lake forecast for lake superior
national weather service marquette mi
1000 am 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 taking shape over the central plains today lifts 
through the straits of mackinac at 29.6 inches tuesday morning. 
following this, weak ridging of around 29.9 inches moves back over 
lake superior from northern ontario tuesday evening through 
wednesday before another low from the central plains lifts through 
lower michigan at 29.7 inches on thursday. behind this low, yet 
another low at around 29.5 inches moves into lake superior on friday 
into saturday.



lsz162-132000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt mon apr 13 2026 /900 am cdt mon apr 13 2026/

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

.rest of today...west winds 5 to 15 knots veering north in the
afternoon, then veering east late. a slight chance of showers and
thunderstorms by mid afternoon. waves calm to 2 feet. 
.tonight...northeast winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then diminishing to 10 to 20 knots late.
a slight chance of thunderstorms through midnight. a chance of
rain showers. waves building to 3 to 5 feet occasionally to
7 feet. 
.tuesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots late. a chance of rain showers. a slight chance of snow
showers by mid afternoon. waves subsiding to 1 to 3 feet. 
.tuesday night...northeast winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots. a slight chance of
rain showers by mid afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots. a chance of
rain showers. waves calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots becoming east 10 to
20 knots. a chance of rain showers. waves building to 3 to 5 feet
occasionally to 7 feet. 
.friday...northeast winds 10 to 20 knots becoming northwest 20 to
30 knots. 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. 

$$

fzus63 kmqt 131401
glfls 
expires:202604132000;;299239

open lake forecast for lake superior
national weather service marquette mi
1000 am 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 taking shape over the central plains today lifts 
through the straits of mackinac at 29.6 inches tuesday morning. 
following this, weak ridging of around 29.9 inches moves back over 
lake superior from northern ontario tuesday evening through 
wednesday before another low from the central plains lifts through 
lower michigan at 29.7 inches on thursday. behind this low, yet 
another low at around 29.5 inches moves into lake superior on friday 
into saturday.



lsz263-132000-
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 mon apr 13 2026

...dense fog advisory in effect until 11 am edt this morning...

.rest of today...west winds 5 to 15 knots becoming northwest less
than 10 knots in the afternoon, then becoming east 5 to 15 knots
late. patchy fog by late morning. waves calm to 2 feet. 
.tonight...east winds 10 to 20 knots backing northeast late. a
slight chance of thunderstorms through midnight. a chance of rain
showers. waves building to 2 to 4 feet. 
.tuesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. a slight chance of rain showers. waves
subsiding to 1 to 3 feet. 
.tuesday night...northeast winds 5 to 15 knots becoming north
less than 10 knots after midnight. waves subsiding to calm to
2 feet. 
.wednesday...northeast winds less than 10 knots increasing to
5 to 15 knots by mid afternoon. a slight chance of rain showers
by mid afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots backing northeast
after midnight. a chance of rain showers. waves calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots becoming east 10 to
20 knots. a chance of rain showers. waves building to 3 to 5 feet
occasionally to 7 feet. 
.friday...east winds 15 to 25 knots becoming west 20 to 30 knots.
a chance of rain showers, then rain showers likely, possibly
mixed with snow showers. waves building to 8 to 11 feet
occasionally to 14 feet. 

$$