North Pacific storm

39°10.7′N 165°53.2′W

Waves left about 12 Oct 23:58Z, ± 2 h

Placed by 7 buoys, whose own placements lie within 283 nmi of it

Its swell was last measured at 46214 (Point Reyes, CA) on 18 Oct 08:00Z; the replay ends there.

Each buoy places the storm from how its swell's period shortened as it arrived: the longest waves travel fastest. Fronts are drawn at deep-water group speeds along great circles, and stop at land. How it is worked out