fzus63 kmqt 040201
glfls 
expires:202608040800;;582243

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon aug 3 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 29.9 inches continues to shift southeast into the lower 
great lakes tonight as 29.7 inch troughing approaches from the west. 
the trough moves over the lake superior at 29.8 inches tonight into 
tuesday as a 29.4 inch low tracks over hudson bay. 30.0 inch ridging 
returns on wednesday as 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.




lsz162-040800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt mon aug 3 2026 /901 pm cdt mon aug 3 2026/

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

$$

fzus63 kmqt 040201
glfls 
expires:202608040800;;582244

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon aug 3 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 29.9 inches continues to shift southeast into the lower 
great lakes tonight as 29.7 inch troughing approaches from the west. 
the trough moves over the lake superior at 29.8 inches tonight into 
tuesday as a 29.4 inch low tracks over hudson bay. 30.0 inch ridging 
returns on wednesday as 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.




lsz263-040800-
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 mon aug 3 2026

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

$$