fzus63 kmqt 221401
glfls 
expires:202605222000;;456904

open lake forecast for lake superior
national weather service marquette mi
1000 am 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... 

remnant high pressure ridging of 30.3 to 30.4 inches remains over 
lake superior today as the parent high shifts east into new england 
and quebec. meanwhile, a 29.8 inch low develops over the southern 
plains and lifts toward the lower great lakes. simultaneously, 
another 29.7 inch low lifts over the northern plains towards angle 
inlet. the lows gradually weaken to around 29.9 inches as they lift 
over southern ontario and eastern manitoba saturday into sunday, 
respectively. 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.



lsz162-222000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt fri may 22 2026 /900 am cdt fri may 22 2026/

.rest of today...northeast winds 10 to 20 knots increasing to
15 to 25 knots in the afternoon. waves calm to 2 feet building to
3 to 5 feet occasionally to 7 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots late. a chance of rain showers. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.saturday...east winds 10 to 20 knots backing northeast in the
afternoon. 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 becoming north
less than 10 knots after midnight. a slight chance of rain
showers. 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...south winds 5 to 15 knots veering southwest after
midnight. waves calm to 2 feet. 
.monday...east winds 5 to 15 knots veering west. waves calm to
2 feet. 
.tuesday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 221401
glfls 
expires:202605222000;;456905

open lake forecast for lake superior
national weather service marquette mi
1000 am 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... 

remnant high pressure ridging of 30.3 to 30.4 inches remains over 
lake superior today as the parent high shifts east into new england 
and quebec. meanwhile, a 29.8 inch low develops over the southern 
plains and lifts toward the lower great lakes. simultaneously, 
another 29.7 inch low lifts over the northern plains towards angle 
inlet. the lows gradually weaken to around 29.9 inches as they lift 
over southern ontario and eastern manitoba saturday into sunday, 
respectively. 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.



lsz263-222000-
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 fri may 22 2026

.rest of today...east winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. waves calm to 2 feet building to 2 to
4 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a chance of rain showers. waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 1 to
3 feet. 
.saturday...east winds 10 to 20 knots. a chance of rain showers
through early afternoon, then rain showers by mid afternoon.
waves building to 3 to 5 feet occasionally to 7 feet. 
.saturday night...southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. a chance of rain showers. waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
1 to 3 feet. 
.sunday...west winds 5 to 15 knots backing southwest 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...south winds 5 to 15 knots veering southwest. waves calm
to 2 feet. 
.tuesday...east winds 5 to 15 knots. waves calm to 2 feet. 

$$