fzus63 kmqt 060801
glfls 
expires:202605062000;;096372

open lake forecast for lake superior
national weather service marquette mi
401 am edt wed may 6 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... 

30.2 inch ridging over the canadian prairies splits today and moves 
to the canadian four corners and the southern plains at 30.0 inches 
and 30.2 inches, respectively. as this happens, expect weak high 
pressure ridging of 29.9 inches to settle over lake superior. by 
thursday afternoon, lake superior is projected to be between a 29.4 
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 29.7 inch trough over lake superior friday, strengthening 
to 29.6 inches by friday night into saturday before the lows 
consolidate over western quebec by late saturday. high pressure 
ridging builds back up to 30.1 inches over lake superior by sunday 
as the parent high strengthens over the canadian prairies and 
northern plains.



lsz162-062000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt wed may 6 2026 /301 am cdt wed may 6 2026/

.early this morning...northwest winds 10 to 20 knots. waves calm
to 2 feet. 
.today...west winds 10 to 20 knots backing southwest late. a
chance of rain and snow showers. waves building to 1 to 3 feet. 
.tonight...west winds 5 to 15 knots. sprinkles through midnight.
waves subsiding to calm to 2 feet. 
.thursday...west winds 5 to 15 knots backing southwest in the
afternoon. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.thursday night...west winds 5 to 15 knots. waves calm to 2 feet.
.friday...southwest winds 5 to 15 knots. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.saturday...west winds 10 to 20 knots veering northwest. waves
calm to 2 feet. 
.sunday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet. 

$$

fzus63 kmqt 060801
glfls 
expires:202605062000;;096373

open lake forecast for lake superior
national weather service marquette mi
401 am edt wed may 6 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... 

30.2 inch ridging over the canadian prairies splits today and moves 
to the canadian four corners and the southern plains at 30.0 inches 
and 30.2 inches, respectively. as this happens, expect weak high 
pressure ridging of 29.9 inches to settle over lake superior. by 
thursday afternoon, lake superior is projected to be between a 29.4 
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 29.7 inch trough over lake superior friday, strengthening 
to 29.6 inches by friday night into saturday before the lows 
consolidate over western quebec by late saturday. high pressure 
ridging builds back up to 30.1 inches over lake superior by sunday 
as the parent high strengthens over the canadian prairies and 
northern plains.



lsz263-062000-
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 wed may 6 2026

.early this morning...northwest winds 5 to 15 knots. waves 1 to
3 feet. 
.today...west winds 5 to 15 knots increasing to 10 to 20 knots in
the afternoon. a chance of rain and snow showers by mid
afternoon. waves building to 2 to 4 feet. 
.tonight...west winds 5 to 15 knots. a chance of rain showers
through midnight. waves subsiding to calm to 2 feet. 
.thursday...west winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon. waves building to 1 to 3 feet. 
.thursday night...southwest winds 5 to 15 knots veering west
after midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves building to 1 to 3 feet. 
.friday night...southwest winds 5 to 15 knots veering west after
midnight. waves subsiding to calm to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest. waves
building to 1 to 3 feet. 
.sunday...west winds 5 to 15 knots veering northwest. waves
subsiding to calm to 2 feet. 

$$