fzus63 kmqt 290201
glfls 
expires:202604290800;;703395

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue apr 28 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...

weak ridging of 30.0 inches this evening builds over lake superior 
to 30.1 inches by wednesday as a 30.3 inch high pressure sets up 
shop over the canadian prairies and a deepening 29.6 inch low lifts 
through west virginia and pennsylvania. high pressure ridging 
gradually strengthens to 30.2 inches over the lake into friday as 
the canadian high shifts east into northwestern ontario and hudson 
bay. weak troughing of 29.9 inches moves over the lake late on 
saturday and strengthens to 29.7 inches through sunday as the parent 
low pressure deepens to 29.6 inches over northern ontario and james 
bay.



lsz162-290800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt tue apr 28 2026 /901 pm cdt tue apr 28 2026/

.rest of tonight...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing southwest in
the afternoon, then veering west late. a slight chance of rain
showers. a slight chance of snow showers by mid afternoon. waves
calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots increasing to 10 to
20 knots late. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots veering south by mid
afternoon. waves calm to 2 feet. 
.friday night...north winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots veering northwest.
waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet. 

$$

fzus63 kmqt 290201
glfls 
expires:202604290800;;703396

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue apr 28 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...

weak ridging of 30.0 inches this evening builds over lake superior 
to 30.1 inches by wednesday as a 30.3 inch high pressure sets up 
shop over the canadian prairies and a deepening 29.6 inch low lifts 
through west virginia and pennsylvania. high pressure ridging 
gradually strengthens to 30.2 inches over the lake into friday as 
the canadian high shifts east into northwestern ontario and hudson 
bay. weak troughing of 29.9 inches moves over the lake late on 
saturday and strengthens to 29.7 inches through sunday as the parent 
low pressure deepens to 29.6 inches over northern ontario and james 
bay.



lsz263-290800-
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 tue apr 28 2026

.rest of tonight...northwest winds 5 to 15 knots. a chance of
rain showers. waves 2 to 4 feet subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing west in the
afternoon. a slight chance of snow showers by mid afternoon.
waves calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots veering north
after midnight. a slight chance of rain and snow showers through
midnight. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots veering west. waves
calm to 2 feet. 
.sunday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet. 

$$