fzus63 kmqt 222001
glfls 
expires:202605230800;;471852

open lake forecast for lake superior
national weather service marquette mi
400 pm edt fri may 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... 

30.4 inch high pressure over quebec is sending 30.3 inch ridging 
over the lake through tonight. meanwhile, two 29.7-29.8 inch lows, 
one over the lower mississippi valley and one over the northern 
plains, are set track into manitoba and the lower great lakes 
(respectively) into saturday while weakening to 29.9 inches. in 
response to these lows, weak troughing of around 30.0 inches passes 
northward over lake superior saturday night into sunday night, 
before ridging of around 30.0 inches returns on monday. behind this, 
expect weak troughing of around 29.9 inches to return to the lake by 
tuesday morning.



lsz162-230800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt fri may 22 2026 /300 pm cdt fri may 22 2026/

.late this afternoon...northeast winds 15 to 25 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots late. a chance of rain showers. waves subsiding to 2 to
4 feet. 
.saturday...northeast winds 10 to 20 knots. rain showers likely
through early afternoon, then a chance of rain showers by mid
afternoon. waves subsiding to 1 to 3 feet. 
.saturday night...northeast winds 5 to 15 knots backing west
late. a slight chance of rain showers through midnight. waves
subsiding to calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots. waves calm to
2 feet. 
.monday...southwest winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.monday night...north winds less than 10 knots. waves calm to
2 feet. 
.tuesday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 
.wednesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 222001
glfls 
expires:202605230800;;471853

open lake forecast for lake superior
national weather service marquette mi
400 pm edt fri may 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... 

30.4 inch high pressure over quebec is sending 30.3 inch ridging 
over the lake through tonight. meanwhile, two 29.7-29.8 inch lows, 
one over the lower mississippi valley and one over the northern 
plains, are set track into manitoba and the lower great lakes 
(respectively) into saturday while weakening to 29.9 inches. in 
response to these lows, weak troughing of around 30.0 inches passes 
northward over lake superior saturday night into sunday night, 
before ridging of around 30.0 inches returns on monday. behind this, 
expect weak troughing of around 29.9 inches to return to the lake by 
tuesday morning.



lsz263-230800-
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 pm edt fri may 22 2026

.late this afternoon...east winds 15 to 25 knots. waves 2 to
4 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a chance of rain showers after midnight.
waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet. 
.saturday...east winds 10 to 20 knots. a chance of rain showers.
waves building to 3 to 5 feet occasionally to 7 feet. 
.saturday night...southeast winds 10 to 20 knots becoming west
5 to 15 knots late. a chance of rain showers. waves subsiding to
1 to 3 feet. 
.sunday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves subsiding to calm to 2 feet. 
.sunday night...south winds 5 to 15 knots veering southwest after
midnight. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.monday night...south winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots backing northeast. waves
calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 

$$