fzus63 kmqt 030201
glfls 
expires:202608030800;;527740

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sun aug 2 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...

ridging of around 30.0 inches over lake superior persists into 
monday as a 29.7 inch low over the lower great lakes this evening 
tracks into southern quebec and deepens to 29.5 inches by monday 
afternoon. a 29.8 inch trough moves over the lake monday night into 
tuesday as a 29.4 inch low tracks over hudson bay. ridging returns 
on wednesday as 30.0 inch high pressure builds into the great lakes 
from the northern plains. for the late week and into the weekend, 
lake superior will be between a 30.3 inch bermuda high and a 29.6 
inch low pressure around western hudson bay.




lsz162-030800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt sun aug 2 2026 /901 pm cdt sun aug 2 2026/

.rest of tonight...northeast winds 5 to 15 knots veering east
late. waves calm to 2 feet. 
.monday...east winds 5 to 15 knots. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots becoming south 10 to
20 knots after midnight, then becoming southwest 15 to 25 knots
late. a chance of showers and a slight chance of thunderstorms
after midnight. waves building to 2 to 4 feet. 
.tuesday...west winds 15 to 25 knots backing southwest by mid
afternoon. a slight chance of showers through early afternoon.
waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.tuesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...southwest winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 
.friday...southwest winds 10 to 20 knots veering west. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 030201
glfls 
expires:202608030800;;527741

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sun aug 2 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...

ridging of around 30.0 inches over lake superior persists into 
monday as a 29.7 inch low over the lower great lakes this evening 
tracks into southern quebec and deepens to 29.5 inches by monday 
afternoon. a 29.8 inch trough moves over the lake monday night into 
tuesday as a 29.4 inch low tracks over hudson bay. ridging returns 
on wednesday as 30.0 inch high pressure builds into the great lakes 
from the northern plains. for the late week and into the weekend, 
lake superior will be between a 30.3 inch bermuda high and a 29.6 
inch low pressure around western hudson bay.




lsz263-030800-
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 pm edt sun aug 2 2026

.rest of tonight...east winds 5 to 15 knots veering southeast
late. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots backing east late. waves calm
to 2 feet. 
.monday night...southeast winds 10 to 20 knots becoming south
15 to 25 knots after midnight. a slight chance of showers after
midnight. waves building to 3 to 5 feet occasionally to 7 feet. 
.tuesday...southwest winds 15 to 25 knots. a slight chance of
showers through early afternoon. waves subsiding to 2 to 4 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.tuesday night...west winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves building to 1 to 3 feet. 
.wednesday night...south winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.friday...southwest winds 15 to 25 knots becoming west 10 to
20 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 

$$