fzus63 kmqt 190901
glfls 
expires:202511192100;;127020

open lake forecast for lake superior
national weather service marquette mi
401 am est wed nov 19 2025

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 30.2 inch ridge over lake superior this morning weakens to 30.0 
inches through this evening as 30.3 inch high pressure over the 
lower great lakes shifts east into new england. a 29.8 inch trough 
moves over the lake on thursday as a developing 29.7 inch low over 
northern manitoba moves into hudson bay. a 30.1 inch ridge of high 
pressure over the northern plains and upper midwest on friday moves 
over the great lakes on saturday. another 29.8 inch trough then 
moves over lake superior saturday night into sunday before 30.1 inch 
high pressure rebuilds over the great lakes early next week.



lsz162-192100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am est wed nov 19 2025 /301 am cst wed nov 19 2025/

.early this morning...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...southwest winds 5 to 15 knots increasing to 10 to
20 knots. a slight chance of rain showers in the afternoon. waves
building to 1 to 3 feet. 
.tonight...southwest winds 10 to 20 knots increasing to 15 to
25 knots by midnight, then diminishing to 10 to 20 knots late. a
chance of rain showers in the evening, then rain showers likely
after midnight. waves building to 3 to 5 feet occasionally to
7 feet. 
.thursday...southwest winds 15 to 25 knots veering west. a chance
of rain showers in the morning. waves subsiding to 1 to 3 feet. 
.thursday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.friday...west winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon. waves subsiding to calm to 2 feet. 
.friday night...northwest winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots veering west. waves
calm to 2 feet. 
.sunday...west winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 190901
glfls 
expires:202511192100;;127021

open lake forecast for lake superior
national weather service marquette mi
401 am est wed nov 19 2025

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 30.2 inch ridge over lake superior this morning weakens to 30.0 
inches through this evening as 30.3 inch high pressure over the 
lower great lakes shifts east into new england. a 29.8 inch trough 
moves over the lake on thursday as a developing 29.7 inch low over 
northern manitoba moves into hudson bay. a 30.1 inch ridge of high 
pressure over the northern plains and upper midwest on friday moves 
over the great lakes on saturday. another 29.8 inch trough then 
moves over lake superior saturday night into sunday before 30.1 inch 
high pressure rebuilds over the great lakes early next week.



lsz263-192100-
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-
401 am est wed nov 19 2025

.early this morning...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...southwest winds 5 to 15 knots increasing to 10 to
20 knots. a slight chance of rain showers in the afternoon. waves
building to 1 to 3 feet. 
.tonight...southwest winds 10 to 20 knots increasing to 15 to
25 knots by midnight. a chance of rain showers. waves building to
3 to 5 feet occasionally to 7 feet. 
.thursday...southwest winds 15 to 25 knots veering west. rain
showers likely in the morning, then a slight chance of rain
showers in the afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.thursday night...west winds 15 to 25 knots. waves subsiding to
2 to 4 feet, then building to 3 to 6 feet occasionally to 8 feet.
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. waves subsiding to calm to 2 feet. 
.friday night...northwest winds 5 to 15 knots backing southwest
after midnight. waves calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots veering west. waves
building to 1 to 3 feet. 
.sunday...west winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 

$$