fzus63 kmqt 232001
glfls 
expires:202610240800;;068321

open lake forecast for lake superior
national weather service marquette mi
400 pm edt fri oct 23 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...

30.5 inch high pressure over the st. lawrence seaway is extending a 
30.2 inch ridge over lake superior. by saturday afternoon, a 29.2 
inch low over northern manitoba drags a 30.1 inch trough over the 
west half of lake superior. the trough remains over the lake until 
saturday night. high pressure of at least 30.6 inches over the 
canadian prairies on sunday and monday pushes ridging of at least 
30.4 inches over the upper great lakes on sunday. the ridging 
intensifies to 30.6 inches monday night into tuesday morning as the 
high's center moves overhead. the high retreats east into new 
england by wednesday morning. 




lsz162-240800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt fri oct 23 2026 /300 pm cdt fri oct 23 2026/

.late this afternoon...east winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots becoming southeast 10 to
20 knots late. patchy fog. a slight chance of showers. waves
building to 1 to 3 feet. 
.saturday...south winds 15 to 25 knots veering southwest late. a
chance of showers by mid afternoon. waves building to 2 to
4 feet. 
.saturday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a chance of showers through midnight.
waves subsiding to calm to 2 feet. 
.sunday...west winds 10 to 20 knots. 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...north winds 10 to 20 knots becoming east 5 to 15 knots
by mid afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.tuesday...east winds 10 to 20 knots. a chance of rain showers.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.wednesday...south winds 10 to 20 knots becoming southwest 20 to
30 knots. a chance of showers. waves building to 2 to 4 feet. 

$$

fzus63 kmqt 232001
glfls 
expires:202610240800;;068322

open lake forecast for lake superior
national weather service marquette mi
400 pm edt fri oct 23 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...

30.5 inch high pressure over the st. lawrence seaway is extending a 
30.2 inch ridge over lake superior. by saturday afternoon, a 29.2 
inch low over northern manitoba drags a 30.1 inch trough over the 
west half of lake superior. the trough remains over the lake until 
saturday night. high pressure of at least 30.6 inches over the 
canadian prairies on sunday and monday pushes ridging of at least 
30.4 inches over the upper great lakes on sunday. the ridging 
intensifies to 30.6 inches monday night into tuesday morning as the 
high's center moves overhead. the high retreats east into new 
england by wednesday morning. 




lsz263-240800-
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-
400 pm edt fri oct 23 2026

.late this afternoon...east winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight. patchy dense fog. a slight chance of
showers after midnight. waves building to 2 to 4 feet. 
.saturday...south winds 15 to 25 knots becoming southwest 10 to
20 knots late. a chance of showers by mid afternoon. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet. 
.saturday night...southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight, then diminishing to 5 to 15 knots
late. a chance of showers through midnight. waves subsiding to
1 to 3 feet. 
.sunday...west winds 10 to 20 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.sunday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...north winds 5 to 15 knots veering northeast by mid
afternoon. waves calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots veering southeast. a chance
of rain showers. waves calm to 2 feet. 
.wednesday...south winds 10 to 20 knots becoming southwest gales
to 35 knots. a chance of rain showers. waves building to 3 to
5 feet occasionally to 7 feet. 

$$