fzus63 kmqt 052001
glfls 
expires:202605060800;;070434

open lake forecast for lake superior
national weather service marquette mi
401 pm 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 29.3 inch low over james bay lifts into northern quebec this 
evening and tonight as 30.2 inch ridging builds east of the canadian 
rockies. wednesday, the 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. high pressure toi 
30.1 inches builds back over the plains by sunday.



lsz162-060800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt tue may 5 2026 /301 pm cdt tue may 5 2026/

.late this afternoon...west winds 10 to 20 knots. sprinkles.
waves 1 to 3 feet. 
.tonight...northwest winds 10 to 20 knots. sprinkles through
midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing southwest late. flurries
through early afternoon. sprinkles. waves 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 veering northwest
after midnight. waves 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. waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.sunday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 052001
glfls 
expires:202605060800;;070435

open lake forecast for lake superior
national weather service marquette mi
401 pm 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 29.3 inch low over james bay lifts into northern quebec this 
evening and tonight as 30.2 inch ridging builds east of the canadian 
rockies. wednesday, the 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. high pressure toi 
30.1 inches builds back over the plains by sunday.



lsz263-060800-
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 tue may 5 2026

.late this afternoon...west winds 10 to 20 knots. sprinkles.
waves 3 to 6 feet occasionally to 8 feet. 
.tonight...west winds 5 to 15 knots veering northwest after
midnight. sprinkles and flurries through midnight. waves
subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots becoming west 10 to
20 knots in the afternoon. flurries through early afternoon.
sprinkles. a slight chance of snow showers by mid afternoon.
waves building to 2 to 4 feet, then subsiding 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. waves calm to
2 feet. 
.friday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.friday night...southwest winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.sunday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$