fzus63 kmqt 130201
glfls 
expires:202610130800;;000018

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt mon oct 12 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...

lake superior is currently between a 29.6 inch low over wisconsin 
and a 30.2 inch high over quebec. ridging dominates over lake 
superior midweek as the low marches east and high pressure of 30.2 
inches builds over the dakotas by wednesday afternoon. the high 
further builds to 30.3 inches over lake superior wednesday night 
while a 29.9 inch low develops over saskatchewan. by thursday 
evening, this low weakens to 29.9 inches over northern ontario as 
the high moves to new england. behind the low, expansive 30.6 inch 
high builds over eastern montana before expanding over the plains 
for friday. pressure increases rapidly over the upper great lakes 
friday afternoon into saturday, reaching 30.4 inches by saturday 
morning, then decreasing to 30.0 inches by saturday night as the 
high collapses southeast.




lsz162-130800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt mon oct 12 2026 /901 pm cdt mon oct 12 2026/

...gale warning in effect until 11 pm edt /10 pm cdt/ this
evening...

.rest of tonight...northeast winds to 30 knots with a few gale
force gusts to 35 knots possible diminishing to 20 to 30 knots
late. patchy fog by midnight. showers and a slight chance of
thunderstorms by midnight, then a chance of showers after
midnight. waves 8 to 11 feet occasionally to 14 feet subsiding to
5 to 8 feet occasionally to 10 feet. 
.tuesday...northeast winds 10 to 20 knots becoming north 5 to
15 knots in the afternoon, then backing west late. waves
subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.wednesday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...west gales to 35 knots becoming northwest gales
to 40 knots after midnight. waves building to 6 to 9 feet
occasionally to 11 feet. 
.friday...northwest gales to 45 knots diminishing to 20 to
30 knots. waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to calm to 2 feet. 
.saturday...southwest winds 15 to 25 knots increasing to gales to
40 knots. waves building to 6 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 130201
glfls 
expires:202610130800;;000019

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt mon oct 12 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...

lake superior is currently between a 29.6 inch low over wisconsin 
and a 30.2 inch high over quebec. ridging dominates over lake 
superior midweek as the low marches east and high pressure of 30.2 
inches builds over the dakotas by wednesday afternoon. the high 
further builds to 30.3 inches over lake superior wednesday night 
while a 29.9 inch low develops over saskatchewan. by thursday 
evening, this low weakens to 29.9 inches over northern ontario as 
the high moves to new england. behind the low, expansive 30.6 inch 
high builds over eastern montana before expanding over the plains 
for friday. pressure increases rapidly over the upper great lakes 
friday afternoon into saturday, reaching 30.4 inches by saturday 
morning, then decreasing to 30.0 inches by saturday night as the 
high collapses southeast.




lsz263-130800-
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 oct 12 2026

.rest of tonight...east winds 20 to 30 knots backing northeast
late. patchy fog. showers by midnight. a chance of thunderstorms.
a chance of showers after midnight. waves 7 to 10 feet
occasionally to 13 feet subsiding to 5 to 8 feet occasionally to
10 feet. 
.tuesday...northeast winds 10 to 20 knots becoming north 5 to
15 knots in the afternoon, then backing west late. a slight
chance of showers through early afternoon. waves subsiding to
1 to 3 feet. 
.tuesday night...west winds 5 to 15 knots veering northwest after
midnight, then increasing to 10 to 20 knots late. waves subsiding
to calm to 2 feet, then building to 1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.thursday...south winds 10 to 20 knots becoming southwest 15 to
25 knots by mid afternoon. a chance of showers by mid afternoon.
waves building to 1 to 3 feet. 
.thursday night...west gales to 35 knots becoming northwest storm
force winds to 50 knots after midnight. a chance of rain showers.
waves building to 10 to 14 feet occasionally to 18 feet. 
.friday...northwest storm force winds to 55 knots diminishing to
gales to 40 knots. waves building to 11 to 15 feet occasionally
to 19 feet, then subsiding to 1 to 3 feet. 
.saturday...southwest winds 20 to 30 knots increasing to gales to
35 knots. waves building to 7 to 10 feet occasionally to 13 feet.

$$