fzus63 kmqt 082001
glfls 
expires:202604090800;;046084

open lake forecast for lake superior
national weather service marquette mi
400 pm edt wed apr 8 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 29.7 inch low moves through lake winnipeg this evening before 
continuing to just north of lake superior tonight. the low 
eventually reaches james bay by thursday morning as high pressure 
builds back into the upper great lakes thursday and friday. the high 
builds to 30.5 inches over the lower great lakes by saturday. on 
sunday, a 29.3 inch low pressure lifts through the northern plains 
while the 30.5 inch high pushes off of the eastern seaboard into the 
atlantic. this low pushes east through the upper great lakes sunday 
night before continuing into northern quebec monday.



lsz162-090800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt wed apr 8 2026 /300 pm cdt wed apr 8 2026/

.late this afternoon...northeast winds 5 to 15 knots. rain
showers. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...southwest winds 10 to 20 knots increasing to 20 to
30 knots after midnight, then veering west late. a slight chance
of rain showers through midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.thursday...west winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to 1 to 3 feet. 
.thursday night...west winds 5 to 15 knots veering northwest
late. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 10 to 20 knots. a chance of rain
showers through midnight. a chance of thunderstorms. rain showers
after midnight. waves building to 2 to 4 feet. 
.sunday...east winds 10 to 20 knots becoming southwest 15 to
25 knots. rain showers. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet. 
.monday...west winds 15 to 25 knots becoming northeast gales to
35 knots. a chance of rain showers, then rain showers, possibly
mixed with snow. waves subsiding to 2 to 4 feet, then building to
9 to 12 feet occasionally to 15 feet. 

$$

fzus63 kmqt 082001
glfls 
expires:202604090800;;046085

open lake forecast for lake superior
national weather service marquette mi
400 pm edt wed apr 8 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 29.7 inch low moves through lake winnipeg this evening before 
continuing to just north of lake superior tonight. the low 
eventually reaches james bay by thursday morning as high pressure 
builds back into the upper great lakes thursday and friday. the high 
builds to 30.5 inches over the lower great lakes by saturday. on 
sunday, a 29.3 inch low pressure lifts through the northern plains 
while the 30.5 inch high pushes off of the eastern seaboard into the 
atlantic. this low pushes east through the upper great lakes sunday 
night before continuing into northern quebec monday.



lsz263-090800-
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 wed apr 8 2026

.late this afternoon...southeast winds 20 to 30 knots. rain
showers. waves 3 to 6 feet occasionally to 8 feet. 
.tonight...southwest winds 15 to 25 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible after midnight,
then veering west late. a chance of rain showers through
midnight. waves subsiding to 3 to 5 feet occasionally to 7 feet,
then building to 6 to 9 feet occasionally to 11 feet. 
.thursday...west winds 20 to 30 knots diminishing to 15 to
25 knots late. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.thursday night...west winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots diminishing to less than
10 knots after midnight. waves calm to 2 feet. 
.saturday...south winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. a chance of rain showers through
midnight, then rain showers after midnight. waves building to
3 to 5 feet occasionally to 7 feet. 
.sunday...southeast winds 15 to 25 knots becoming southwest 20 to
30 knots. rain showers and a chance of thunderstorms. waves
subsiding to 2 to 4 feet, then building to 4 to 7 feet
occasionally to 9 feet. 
.monday...west winds 20 to 30 knots becoming northeast gales to
35 knots. a chance of rain showers, then rain showers, possibly
mixed with snow. waves subsiding to 3 to 6 feet occasionally to
8 feet, then building to 10 to 14 feet occasionally to 18 feet. 

$$