fzus63 kmqt 052001
glfls 
expires:202608060800;;676286

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed aug 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...

high pressure over the plains is extending 30.0 inch ridging over 
the lake this afternoon, which remains through thursday. for friday 
and into the weekend, pressure over lake superior will remain around 
29.9 inches between a 30.3 inch bermuda high and 29.5 inch low 
pressure near the western shores of hudson bay. on monday, pressure 
over lake superior rises slightly to 30.0 inches as the hudson bay 
low shifts east and ridging builds in from the western provinces of 
canada.




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

.late this afternoon...south winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...south winds 5 to 15 knots veering southwest late.
waves calm to 2 feet. 
.thursday...southwest winds 15 to 25 knots backing south late.
waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.thursday night...southwest winds 15 to 25 knots. a chance of
showers and a slight chance of thunderstorms after midnight.
waves building to 2 to 4 feet. 
.friday...southwest winds 10 to 20 knots. a chance of showers and
a slight chance of thunderstorms. waves subsiding to calm to
2 feet. 
.friday night...northwest winds 10 to 20 knots backing west after
midnight. waves calm to 2 feet. 
.saturday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.saturday night...west winds 5 to 15 knots. waves calm to 2 feet.
.sunday...southwest winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.monday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 052001
glfls 
expires:202608060800;;676287

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed aug 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...

high pressure over the plains is extending 30.0 inch ridging over 
the lake this afternoon, which remains through thursday. for friday 
and into the weekend, pressure over lake superior will remain around 
29.9 inches between a 30.3 inch bermuda high and 29.5 inch low 
pressure near the western shores of hudson bay. on monday, pressure 
over lake superior rises slightly to 30.0 inches as the hudson bay 
low shifts east and ridging builds in from the western provinces of 
canada.




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 wed aug 5 2026

.late this afternoon...south winds 10 to 20 knots. waves 1 to
3 feet. 
.tonight...south winds 10 to 20 knots veering southwest late.
waves subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.thursday...southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon, then diminishing to 15 to 25 knots
late. waves building to 3 to 6 feet occasionally to 8 feet, then
subsiding to 2 to 4 feet. 
.thursday night...south winds 15 to 25 knots veering southwest
after midnight. a slight chance of showers and thunderstorms
after midnight. waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet. 
.friday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. a chance of showers through early
afternoon. a slight chance of thunderstorms. showers likely by
mid afternoon. waves subsiding to calm to 2 feet. 
.friday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...west winds 10 to 20 knots becoming southwest 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.saturday night...west winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.sunday...west winds 10 to 20 knots diminishing to 5 to 15 knots.
waves calm to 2 feet. 
.monday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$