fzus63 kmqt 050801
glfls 
expires:202605052000;;042393

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue may 5 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 29.1 inch low over far-northeast ontario lifts into james bay at 
29.2 inches by this morning as 30.2 inch ridging builds east of the 
canadian rockies. the low continues lifting into far northern quebec 
into wednesday as high pressure over the canadian prairie splits and 
moves to the canadian four corners and the southern plains at 30.0 
inches and 30.2 inches respectively. by thursday afternoon, lake 
superior is projected to be between a 29.5 inch low over hudson bay, 
a 29.4 inch low over the mouth of the st lawrence river, a low of 
29.7 inches over the black hills, a high of 30.1 inches over 
oklahoma, and a weak 29.9 inch high over the saskatchewan/manitoba 
line. the hudson bay and black hills lows work to pass a 29.8 inch 
trough over lake superior thursday night into friday, with the lows 
consolidating over quebec by saturday, leaving remnant 29.7 inch 
troughing over lake superior.



lsz162-052000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt tue may 5 2026 /301 am cdt tue may 5 2026/

.early this morning...northwest winds 15 to 25 knots. waves 1 to
3 feet building to 2 to 4 feet. 
.today...west winds 15 to 25 knots. a slight chance of rain and
snow showers by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet. 
.tonight...west winds 10 to 20 knots veering northwest after
midnight. a slight chance of rain and snow showers through
midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 10 to 20 knots becoming southwest 5 to
15 knots late. waves calm to 2 feet. 
.wednesday night...west winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots veering northwest
after midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots veering west. waves calm
to 2 feet. 
.saturday...west winds 10 to 20 knots becoming northwest 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 050801
glfls 
expires:202605052000;;042394

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue may 5 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 29.1 inch low over far-northeast ontario lifts into james bay at 
29.2 inches by this morning as 30.2 inch ridging builds east of the 
canadian rockies. the low continues lifting into far northern quebec 
into wednesday as high pressure over the canadian prairie splits and 
moves to the canadian four corners and the southern plains at 30.0 
inches and 30.2 inches respectively. by thursday afternoon, lake 
superior is projected to be between a 29.5 inch low over hudson bay, 
a 29.4 inch low over the mouth of the st lawrence river, a low of 
29.7 inches over the black hills, a high of 30.1 inches over 
oklahoma, and a weak 29.9 inch high over the saskatchewan/manitoba 
line. the hudson bay and black hills lows work to pass a 29.8 inch 
trough over lake superior thursday night into friday, with the lows 
consolidating over quebec by saturday, leaving remnant 29.7 inch 
troughing over lake superior.



lsz263-052000-
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 am edt tue may 5 2026

.early this morning...west winds 15 to 25 knots. waves 2 to
4 feet. 
.today...west winds 15 to 25 knots. a slight chance of rain and
snow showers by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.tonight...west winds 10 to 20 knots veering northwest after
midnight, then diminishing to 5 to 15 knots late. a slight chance
of rain and snow showers through midnight. waves subsiding to
1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots backing west in the
afternoon. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 
.wednesday night...west winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.thursday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots diminishing to
less than 10 knots after midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots veering west. waves calm
to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$