fzus63 kmqt 242001
glfls 
expires:202604250800;;458256

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri apr 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...

tonight into saturday, low pressure near lake winnipeg weakens 
considerably as remnant troughing moves south and 30.0 inch ridging 
builds over lake superior by late saturday. this ridge builds to 
30.1 inches by late sunday and persists into early monday. 
meanwhile, a 29.3 inch colorado low develops, moving towards the 
upper midwest by early monday, causing pressure over lake superior 
to fall rapidly toward 29.7 inches by mid-monday. lake superior 
pressure continues to fall as this 29.3 inch low reaches mn/wi by 
late monday and lake superior by early tuesday, causing pressure 
over the lake to remain low near 29.3 throughout tuesday. this low 
lifts north into ontario wednesday morning, and lake superior 
pressures increase to 29.8 inches by wednesday midday.



lsz162-250800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt fri apr 24 2026 /301 pm cdt fri apr 24 2026/

.late this afternoon...southwest winds 5 to 15 knots. waves 1 to
3 feet. 
.tonight...west winds 5 to 15 knots veering north after midnight.
waves subsiding to calm to 2 feet. 
.saturday...north winds 5 to 15 knots veering south in the
afternoon, then backing east late. waves calm to 2 feet. 
.saturday night...northeast winds 5 to 15 knots. a slight chance
of rain showers after midnight. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...northeast winds 10 to 20 knots. waves building to
1 to 3 feet. 
.monday...east winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. a chance of rain showers through early
afternoon, then rain showers likely by mid afternoon. waves
building to 5 to 8 feet occasionally to 10 feet. 
.monday night...northeast winds 20 to 30 knots backing north
after midnight. rain showers. waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.tuesday...west gales to 35 knots diminishing to 20 to 30 knots.
a chance of rain showers. waves subsiding to 4 to 8 feet
occasionally to 10 feet. 
.wednesday...west winds 10 to 20 knots veering northwest. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 242001
glfls 
expires:202604250800;;458257

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri apr 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...

tonight into saturday, low pressure near lake winnipeg weakens 
considerably as remnant troughing moves south and 30.0 inch ridging 
builds over lake superior by late saturday. this ridge builds to 
30.1 inches by late sunday and persists into early monday. 
meanwhile, a 29.3 inch colorado low develops, moving towards the 
upper midwest by early monday, causing pressure over lake superior 
to fall rapidly toward 29.7 inches by mid-monday. lake superior 
pressure continues to fall as this 29.3 inch low reaches mn/wi by 
late monday and lake superior by early tuesday, causing pressure 
over the lake to remain low near 29.3 throughout tuesday. this low 
lifts north into ontario wednesday morning, and lake superior 
pressures increase to 29.8 inches by wednesday midday.



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-
401 pm edt fri apr 24 2026

.late this afternoon...west winds 5 to 15 knots. waves 3 to
5 feet occasionally to 7 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight, then backing northwest late. patchy fog after midnight.
waves subsiding to calm to 2 feet. 
.saturday...north winds 5 to 15 knots veering east late. patchy
fog through early afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots diminishing to less
than 10 knots late. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.monday...east winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. a chance of rain showers. waves building to
6 to 9 feet occasionally to 11 feet. 
.monday night...east gales to 40 knots. rain showers. waves
building to 11 to 15 feet occasionally to 19 feet, then subsiding
to 10 to 14 feet occasionally to 18 feet. 
.tuesday...west gales to 35 knots. a chance of rain showers.
waves subsiding to 6 to 9 feet occasionally to 11 feet, then
building to 9 to 12 feet occasionally to 15 feet. 
.wednesday...west winds 10 to 20 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$