fzus63 kmqt 260200
glfls 
expires:202610260800;;189198

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sun oct 25 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...

30.7 inch high pressure over the canadian prairies extends 30.4 inch 
ridging over the upper great lakes tonight. high pressure becomes 
centered over northern ontario at 30.5 inches on monday, shifting to 
the saint lawrence seaway on tuesday. a 29.8 inch low tracks from 
the northern plains tuesday night to james bay at 29.6 inches by 
thursday morning, dragging a 29.9 inch trough across lake superior 
wednesday evening to thursday morning. high pressure of 30.2 to 30.3 
inches returns to the upper great lakes by friday.




lsz162-260800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt sun oct 25 2026 /900 pm cdt sun oct 25 2026/

.rest of tonight...northwest winds 10 to 20 knots veering north
after midnight. waves calm to 2 feet. 
.monday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then veering east late. waves calm to
2 feet. 
.monday night...east winds 5 to 15 knots increasing to 15 to
25 knots. a chance of rain showers after midnight. 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 10 to 20 knots becoming south 5 to
15 knots after midnight. a chance of showers. waves subsiding to
1 to 3 feet. 
.wednesday...southwest winds 10 to 20 knots. waves 1 to 3 feet. 
.wednesday night...west winds 10 to 20 knots. a chance of
showers. waves subsiding to calm to 2 feet. 
.thursday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.friday...north winds 5 to 15 knots veering east. a chance of
showers. waves calm to 2 feet. 

$$

fzus63 kmqt 260200
glfls 
expires:202610260800;;189199

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sun oct 25 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...

30.7 inch high pressure over the canadian prairies extends 30.4 inch 
ridging over the upper great lakes tonight. high pressure becomes 
centered over northern ontario at 30.5 inches on monday, shifting to 
the saint lawrence seaway on tuesday. a 29.8 inch low tracks from 
the northern plains tuesday night to james bay at 29.6 inches by 
thursday morning, dragging a 29.9 inch trough across lake superior 
wednesday evening to thursday morning. high pressure of 30.2 to 30.3 
inches returns to the upper great lakes by friday.




lsz263-260800-
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 sun oct 25 2026

.rest of tonight...northwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight. waves 1 to 3 feet building to 2 to
4 feet. 
.monday...north winds 5 to 15 knots veering northeast in the
afternoon. waves subsiding to calm to 2 feet. 
.monday night...east winds 5 to 15 knots increasing to 10 to
20 knots late. a chance of rain showers after midnight. waves
building to 1 to 3 feet. 
.tuesday...southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. a chance of rain showers through early
afternoon, then rain showers likely by mid afternoon. 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
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet. 
.wednesday...southwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves 2 to 4 feet. 
.wednesday night...southwest winds 10 to 20 knots veering west
after midnight. a chance of showers. waves subsiding to 1 to
3 feet. 
.thursday...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.friday...west winds 5 to 15 knots backing east. waves calm to
2 feet. 

$$