fzus63 kmqt 100801
glfls 
expires:202604102000;;124962

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri apr 10 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...

30.4 inch high pressure over the plains sends 30.2 inch ridging over 
the lake today. ridging over the lake builds to 30.4 inches tonight 
into saturday as high pressure becomes centered over the lower great 
lakes at 30.5 inches. on sunday, a 29.3 inch low pressure lifts 
through the northern plains while the 30.5 inch high pushes off of 
the eastern seaboard into the atlantic. this low pushes east through 
the upper great lakes sunday night before continuing into northern 
quebec monday. another low will take shape over the central plains 
on monday, deepening to 29.5 inches on tuesday with a weak 29.8 inch 
trough extending through the upper great lakes.



lsz162-102000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt fri apr 10 2026 /300 am cdt fri apr 10 2026/

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...west winds 10 to 20 knots backing southwest in the
afternoon, then diminishing to 5 to 15 knots late. waves calm to
2 feet. 
.tonight...west winds 5 to 15 knots veering northwest late. waves
calm to 2 feet. 
.saturday...east winds 5 to 15 knots. a slight chance of rain
showers, possibly mixed with snow by mid afternoon. waves calm to
2 feet. 
.saturday night...east winds 10 to 20 knots. a slight chance of
thunderstorms through midnight. rain showers. waves building to
2 to 4 feet. 
.sunday...east winds 5 to 15 knots backing northeast by mid
afternoon. rain showers. a chance of thunderstorms by mid
afternoon. waves subsiding to 1 to 3 feet. 
.sunday night...west winds 10 to 20 knots. a chance of rain
showers. waves subsiding to calm to 2 feet, then building to 1 to
3 feet. 
.monday...east winds 5 to 15 knots becoming northeast 15 to
25 knots. rain showers likely. waves building to 5 to 8 feet
occasionally to 10 feet. 
.tuesday...northeast winds 15 to 25 knots increasing to 20 to
30 knots. a chance of rain showers. waves subsiding to 3 to
6 feet occasionally to 8 feet, then building to 7 to 10 feet
occasionally to 13 feet. 

$$

fzus63 kmqt 100801
glfls 
expires:202604102000;;124963

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri apr 10 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...

30.4 inch high pressure over the plains sends 30.2 inch ridging over 
the lake today. ridging over the lake builds to 30.4 inches tonight 
into saturday as high pressure becomes centered over the lower great 
lakes at 30.5 inches. on sunday, a 29.3 inch low pressure lifts 
through the northern plains while the 30.5 inch high pushes off of 
the eastern seaboard into the atlantic. this low pushes east through 
the upper great lakes sunday night before continuing into northern 
quebec monday. another low will take shape over the central plains 
on monday, deepening to 29.5 inches on tuesday with a weak 29.8 inch 
trough extending through the upper great lakes.



lsz263-102000-
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 fri apr 10 2026

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...northwest winds 5 to 15 knots backing southwest late.
waves calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight, then diminishing to less than 10 knots late. waves calm
to 2 feet. 
.saturday...south winds less than 10 knots backing southeast in
the afternoon, then becoming east 5 to 15 knots late. a slight
chance of rain and snow showers by mid afternoon. waves calm to
2 feet. 
.saturday night...southeast winds 10 to 20 knots. rain showers. a
slight chance of thunderstorms after midnight. waves building to
3 to 5 feet occasionally to 7 feet. 
.sunday...southeast winds 10 to 20 knots becoming south 5 to
15 knots by mid afternoon. rain showers. a chance of
thunderstorms by mid afternoon. waves subsiding to 2 to 4 feet. 
.sunday night...southwest winds 10 to 20 knots veering west after
midnight. rain showers likely through midnight. waves 2 to
4 feet. 
.monday...northwest winds 10 to 20 knots becoming east 20 to
30 knots. a chance of rain showers. waves subsiding to calm to
2 feet, then building to 5 to 8 feet occasionally to 10 feet. 
.tuesday...northeast winds 20 to 30 knots veering east. a chance
of rain showers. waves subsiding to 3 to 6 feet occasionally to
8 feet, then building to 7 to 10 feet occasionally to 13 feet. 

$$