fzus63 kmqt 220801
glfls 
expires:202605222000;;444317

open lake forecast for lake superior
national weather service marquette mi
400 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 tonight into friday 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-
400 am edt fri may 22 2026 /300 am cdt fri may 22 2026/

.early this morning...east winds 5 to 15 knots. waves 1 to 3 feet
subsiding to calm to 2 feet. 
.today...east winds 10 to 20 knots becoming northeast 15 to
25 knots in the afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a chance of rain showers. waves
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 220801
glfls 
expires:202605222000;;444318

open lake forecast for lake superior
national weather service marquette mi
400 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 tonight into friday 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-
400 am edt fri may 22 2026

.early this morning...east winds 5 to 15 knots. waves calm to
2 feet. 
.today...east winds 5 to 15 knots increasing to 15 to 25 knots.
waves building to 3 to 5 feet occasionally to 7 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a slight chance of rain showers after
midnight. waves subsiding to 2 to 4 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. 

$$