North Pacific storm

49°44.5′N 146°12.1′W

Waves left about 18 Oct 12:47Z, ± 2 h

Placed by 4 buoys, whose own placements lie within 197 nmi of it

Its swell was last measured at 46014 (Point Arena, CA) on 22 Oct 04:50Z; 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