fzus63 kmqt 150801
glfls 
expires:202604152000;;396972

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed apr 15 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...

weak ridging of around 29.8 to 29.9 inches settles over the lake 
today before another low from the central plains lifts through lower 
michigan or closer to the straits at around 29.7 inches. 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. this deepens further to 29.0 inches 
over far northern quebec by sunday morning. 30.2 inch ridging builds 
in over lake superior for sunday night.



lsz162-152000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt wed apr 15 2026 /300 am cdt wed apr 15 2026/

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

.early this morning...west winds 5 to 15 knots. areas of dense
fog. waves calm to 2 feet. 
.today...northwest winds 5 to 15 knots veering northeast in the
afternoon. areas of dense fog through early afternoon. waves calm
to 2 feet. 
.tonight...east winds 5 to 15 knots backing northeast late.
patchy fog through midnight, then areas of dense fog after
midnight. waves calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots veering east in the
afternoon. areas of dense fog through early afternoon. waves calm
to 2 feet. 
.thursday night...northeast winds 10 to 20 knots. waves calm to
2 feet. 
.friday...northeast winds 15 to 25 knots. a chance of rain
showers. a chance of thunderstorms by mid afternoon. waves
building to 2 to 4 feet. 
.friday night...north winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight. rain showers through midnight,
then a chance of rain showers, possibly mixed with snow after
midnight. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.saturday...west winds 20 to 30 knots veering northwest. a chance
of snow showers. waves building to 3 to 6 feet occasionally to
8 feet. 
.sunday...northwest winds 20 to 30 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202604152000;;396973

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed apr 15 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...

weak ridging of around 29.8 to 29.9 inches settles over the lake 
today before another low from the central plains lifts through lower 
michigan or closer to the straits at around 29.7 inches. 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. this deepens further to 29.0 inches 
over far northern quebec by sunday morning. 30.2 inch ridging builds 
in over lake superior for sunday night.



lsz263-152000-
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 am edt wed apr 15 2026

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

.early this morning...north winds less than 10 knots. areas of
dense fog. waves calm to 2 feet. 
.today...north winds less than 10 knots veering northeast late.
areas of dense fog through early afternoon. waves calm to 2 feet.
.tonight...east winds less than 10 knots. patchy fog through
midnight, then areas of dense fog after midnight. waves calm to
2 feet. 
.thursday...northeast winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then veering east late. areas of dense
fog through early afternoon. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots. waves calm to 2 feet.
.friday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. a chance of rain showers by mid afternoon.
waves building to 2 to 4 feet. 
.friday night...northeast winds 20 to 30 knots backing northwest
after midnight. rain showers through midnight, then a chance of
rain showers, possibly mixed with snow after midnight. waves
building to 4 to 7 feet occasionally to 9 feet. 
.saturday...west gales to 35 knots veering northwest. a chance of
snow showers. waves building to 8 to 11 feet occasionally to
14 feet. 
.sunday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to 1 to 3 feet. 

$$