fzus63 kmqt 210201
glfls 
expires:202605210800;;375914

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed may 20 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... 

a 30.4 inch high pressure remains over lake superior tonight before 
shifting east through friday into new england and quebec. 
nevertheless, remnant ridging of at least 30.3 inches remains over 
lake superior until this weekend. meanwhile, a 29.7 inch low 
develops over the southern plains and lifts toward the great lakes. 
the low gradually weakens to 29.9 inches as it lifts over lower 
michigan and lake huron saturday into sunday. weak troughing of 30.0 
inches passes northward over lake superior saturday night into 
sunday before ridging of around 30.0 inches returns on monday.



lsz162-210800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt wed may 20 2026 /900 pm cdt wed may 20 2026/

.rest of tonight...east winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...southeast winds 5 to 15 knots backing east in the
afternoon. waves calm to 2 feet. 
.thursday night...northeast winds 5 to 15 knots veering east
late. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots becoming northeast 15 to
25 knots by mid afternoon. waves building to 2 to 4 feet. 
.friday night...northeast 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 1 to 3 feet. 
.saturday...northeast winds 10 to 20 knots. rain showers likely
through early afternoon, then a chance of rain showers by mid
afternoon. waves building to 2 to 4 feet. 
.saturday night...northeast winds 5 to 15 knots backing north
after midnight. a chance of rain showers. waves subsiding to calm
to 2 feet. 
.sunday...southwest winds 5 to 15 knots. waves calm to 2 feet. 
.monday...east winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 210201
glfls 
expires:202605210800;;375915

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed may 20 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... 

a 30.4 inch high pressure remains over lake superior tonight before 
shifting east through friday into new england and quebec. 
nevertheless, remnant ridging of at least 30.3 inches remains over 
lake superior until this weekend. meanwhile, a 29.7 inch low 
develops over the southern plains and lifts toward the great lakes. 
the low gradually weakens to 29.9 inches as it lifts over lower 
michigan and lake huron saturday into sunday. weak troughing of 30.0 
inches passes northward over lake superior saturday night into 
sunday before ridging of around 30.0 inches returns on monday.



lsz263-210800-
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 pm edt wed may 20 2026

.rest of tonight...southeast winds 5 to 15 knots diminishing to
less than 10 knots after midnight, then becoming south 5 to
15 knots late. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing northeast in the
afternoon, then veering east late. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves building to 2 to 4 feet. 
.friday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. a slight chance of rain showers after
midnight. waves subsiding to 1 to 3 feet. 
.saturday...east winds 10 to 20 knots. rain showers likely. waves
building to 3 to 6 feet occasionally to 8 feet. 
.saturday night...east winds 5 to 15 knots veering southwest
after midnight. a chance of rain showers. waves subsiding to 1 to
3 feet. 
.sunday...southwest winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.monday...southwest winds 5 to 15 knots. waves calm to 2 feet. 

$$