fzus63 kmqt 242001
glfls 
expires:202605250800;;584005

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sun may 24 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... 

high pressure off the coast of new england will push east tonight 
with weak troughing of 29.7 inches moving from the canadian prairies 
towards ontario. this will keep weak ridging of 29.9 inches over 
lake superior. a 30.1 inch ridge forms monday over the lower great 
lakes as the trough retreats to alberta. monday night, a 29.7 inch 
trough will be over northern ontario, extending 29.9 inch troughing 
over the lake. by tuesday night, a 30.2 inch high over the western 
shores of hudson bay will extend weak ridging over lake superior 
with 29.4 inch troughing forming in the lee of the northern us 
rockies. pressure rises over the lake as the high shifts southeast 
over northern ontario while low pressure over the west weakens on 
wednesday and thursday.



lsz162-250800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt sun may 24 2026 /300 pm cdt sun may 24 2026/

.late this afternoon...south winds 5 to 15 knots. patchy fog. a
slight chance of showers and thunderstorms. waves calm to 2 feet.
.tonight...southeast winds 5 to 15 knots backing northeast after
midnight, then veering southwest late. patchy fog through
midnight. a slight chance of rain showers. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots veering southwest in the
afternoon. a slight chance of showers and thunderstorms by mid
afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots veering west after
midnight. a slight chance of showers and thunderstorms through
midnight. waves calm to 2 feet. 
.tuesday...northwest winds 5 to 15 knots veering east by mid
afternoon. waves calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.wednesday...northeast winds 10 to 20 knots. waves building to
2 to 4 feet, then subsiding to 1 to 3 feet. 
.wednesday night...northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots backing north. waves
calm to 2 feet. 
.friday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 242001
glfls 
expires:202605250800;;584006

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sun may 24 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... 

high pressure off the coast of new england will push east tonight 
with weak troughing of 29.7 inches moving from the canadian prairies 
towards ontario. this will keep weak ridging of 29.9 inches over 
lake superior. a 30.1 inch ridge forms monday over the lower great 
lakes as the trough retreats to alberta. monday night, a 29.7 inch 
trough will be over northern ontario, extending 29.9 inch troughing 
over the lake. by tuesday night, a 30.2 inch high over the western 
shores of hudson bay will extend weak ridging over lake superior 
with 29.4 inch troughing forming in the lee of the northern us 
rockies. pressure rises over the lake as the high shifts southeast 
over northern ontario while low pressure over the west weakens on 
wednesday and thursday.



lsz263-250800-
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 sun may 24 2026

.late this afternoon...southwest winds 10 to 20 knots. patchy
dense fog. a slight chance of rain showers. waves 1 to 3 feet. 
.tonight...south winds 5 to 15 knots veering southwest late.
patchy fog. a slight chance of thunderstorms through midnight. a
slight chance of rain showers. waves subsiding to calm to 2 feet.
.monday...southwest winds 5 to 15 knots. patchy dense fog through
early afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots veering west after
midnight. a chance of showers and a slight chance of
thunderstorms through midnight. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet. 
.tuesday...northwest winds 5 to 15 knots becoming east less than
10 knots by mid afternoon. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots backing northeast after
midnight. waves calm to 2 feet. 
.wednesday...northeast winds 10 to 20 knots. waves building to
2 to 4 feet, then subsiding to 1 to 3 feet. 
.wednesday night...east winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.thursday...east winds 5 to 15 knots becoming southwest less than
10 knots. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots. waves calm to 2 feet. 

$$