fzus63 kmqt 182001
glfls 
expires:202610190800;;326033

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun oct 18 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...


a 29.1 inch low over northern ontario will track east over the 
hudson bay tonight and a 30.3 inch high will build over lake 
superior through monday afternoon. high pressure will slowly shift 
east and gradually strengthens to 30.5 inches over quebec through 
tuesday night. ridging then weakens to 30.1 inches over the lake on 
wednesday as a 29.7 inch trough crosses hudson bay. high pressure 
will build back over the lake wednesday night into thursday, 
reaching 30.3 inches.




lsz162-190800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sun oct 18 2026 /301 pm cdt sun oct 18 2026/

.late this afternoon...southwest winds 20 to 30 knots. waves 7 to
10 feet occasionally to 13 feet subsiding to 5 to 8 feet
occasionally to 10 feet. 
.tonight...southwest winds 15 to 25 knots becoming west 5 to
15 knots after midnight, then veering northwest late. waves
subsiding to calm to 2 feet. 
.monday...north winds 5 to 15 knots veering northeast in the
afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots veering southwest after
midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots. waves calm to 2 feet.
.wednesday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...east winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots becoming south 15 to 25 knots.
waves building to 2 to 4 feet. 

$$

fzus63 kmqt 182001
glfls 
expires:202610190800;;326034

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun oct 18 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...


a 29.1 inch low over northern ontario will track east over the 
hudson bay tonight and a 30.3 inch high will build over lake 
superior through monday afternoon. high pressure will slowly shift 
east and gradually strengthens to 30.5 inches over quebec through 
tuesday night. ridging then weakens to 30.1 inches over the lake on 
wednesday as a 29.7 inch trough crosses hudson bay. high pressure 
will build back over the lake wednesday night into thursday, 
reaching 30.3 inches.




lsz263-190800-
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-
401 pm edt sun oct 18 2026

...gale warning in effect until 5 pm edt this afternoon...

.late this afternoon...southwest winds to 30 knots with a few
gale force gusts to 35 knots possible. waves 8 to 11 feet
occasionally to 14 feet subsiding to 7 to 10 feet occasionally to
13 feet. 
.tonight...southwest winds 20 to 30 knots becoming west 10 to
20 knots after midnight, then becoming northwest 5 to 15 knots
late. waves subsiding to calm to 2 feet. 
.monday...north winds less than 10 knots becoming northeast 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots veering southeast late.
waves calm to 2 feet. 
.tuesday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots veering southwest
after midnight. waves building to 1 to 3 feet. 
.wednesday...southwest winds 5 to 15 knots veering west by mid
afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...east winds 5 to 15 knots veering southeast. waves
calm to 2 feet. 
.friday...southeast winds 5 to 15 knots becoming south 15 to
25 knots. waves building to 2 to 4 feet. 

$$