fzus63 kmqt 250201
glfls 
expires:202610250800;;136162

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat oct 24 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 of 30.5 inches over alberta this evening builds to 
30.6 inches over the canadian prairies on sunday, pushing ridging of 
30.4 inches over the upper great lakes by sunday evening. high 
pressure then becomes centered over northern ontario at 30.5 inches 
monday into tuesday. a weakening 30.0 inch low then lifts north over 
minnesota on tuesday. behind it, a 29.8 inch low quickly follows a 
similar northeast track over the dakotas/northwestern minnesota 
tuesday night into wednesday while the high moves to new england. 
the low then tracks northeast over northern ontario on wednesday as 
it deepens to 29.6 inches, bringing troughing of at least 29.9 
inches over lake superior wednesday night. high pressure ridging of 
30.2 inches returns to the upper great lakes by thursday.




lsz162-250800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt sat oct 24 2026 /900 pm cdt sat oct 24 2026/

.rest of tonight...west winds 10 to 20 knots. waves calm to
2 feet. 
.sunday...west winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. waves building to 1 to 3 feet. 
.sunday night...northwest winds 10 to 20 knots veering north
after midnight. waves subsiding to calm to 2 feet. 
.monday...northeast winds 10 to 20 knots veering east by mid
afternoon. waves calm to 2 feet. 
.monday night...east winds 10 to 20 knots increasing to 15 to
25 knots after midnight. a chance of rain showers. waves building
to 2 to 4 feet. 
.tuesday...east winds 15 to 25 knots. rain showers. waves
building to 3 to 5 feet occasionally to 7 feet. 
.tuesday night...east winds 15 to 25 knots becoming southeast
5 to 15 knots after midnight. a chance of showers through
midnight, then showers likely after midnight. waves subsiding to
1 to 3 feet. 
.wednesday...southwest winds 10 to 20 knots veering west. a
chance of showers. waves building to 2 to 4 feet, then subsiding
to 1 to 3 feet. 
.thursday...west winds 10 to 20 knots becoming northwest 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 250201
glfls 
expires:202610250800;;136163

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat oct 24 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 of 30.5 inches over alberta this evening builds to 
30.6 inches over the canadian prairies on sunday, pushing ridging of 
30.4 inches over the upper great lakes by sunday evening. high 
pressure then becomes centered over northern ontario at 30.5 inches 
monday into tuesday. a weakening 30.0 inch low then lifts north over 
minnesota on tuesday. behind it, a 29.8 inch low quickly follows a 
similar northeast track over the dakotas/northwestern minnesota 
tuesday night into wednesday while the high moves to new england. 
the low then tracks northeast over northern ontario on wednesday as 
it deepens to 29.6 inches, bringing troughing of at least 29.9 
inches over lake superior wednesday night. high pressure ridging of 
30.2 inches returns to the upper great lakes by thursday.




lsz263-250800-
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-
1000 pm edt sat oct 24 2026

.rest of tonight...west winds 10 to 20 knots diminishing to 5 to
15 knots late. a slight chance of showers by midnight. waves calm
to 2 feet. 
.sunday...west winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. waves building to 2 to 4 feet. 
.sunday night...northwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...northeast winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.monday night...east winds 5 to 15 knots. a slight chance of rain
showers after midnight. waves building to 1 to 3 feet. 
.tuesday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. rain showers likely. waves building to 3 to
5 feet occasionally to 7 feet. 
.tuesday night...southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight. a chance of showers. waves
subsiding to 2 to 4 feet. 
.wednesday...south winds 15 to 25 knots veering west. a chance of
showers. waves building to 3 to 5 feet occasionally to 7 feet. 
.thursday...west winds 15 to 25 knots becoming northwest 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$