fzus63 kmqt 051401
glfls 
expires:202608052000;;661658

open lake forecast for lake superior
national weather service marquette mi
1001 am 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 morning, which remains through thursday. for the late 
week 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.




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

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

$$

fzus63 kmqt 051401
glfls 
expires:202608052000;;661659

open lake forecast for lake superior
national weather service marquette mi
1001 am 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 morning, which remains through thursday. for the late 
week 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.




lsz263-052000-
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 wed aug 5 2026

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

$$