fzus63 kmqt 051401
glfls 
expires:202605052000;;055485

open lake forecast for lake superior
national weather service marquette mi
1001 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 29.2 inch low over james bay today weakens to 29.3 inches and 
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.



lsz162-052000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt tue may 5 2026 /901 am cdt tue may 5 2026/

.rest of today...west winds 15 to 25 knots. waves 3 to 5 feet
occasionally to 7 feet 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 051401
glfls 
expires:202605052000;;055486

open lake forecast for lake superior
national weather service marquette mi
1001 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 29.2 inch low over james bay today weakens to 29.3 inches and 
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.



lsz263-052000-
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-
1001 am edt tue may 5 2026

.rest of today...west winds 15 to 25 knots. waves 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. 

$$