North Pacific storm

53°34.3′N 159°54.8′E

Waves left about 11 Oct 16:32Z, ± 6 h

Placed by 4 buoys, whose own placements lie within 545 nmi of it

Its swell was last measured at 51101 (Northwestern Hawaii Two) on 19 Oct 18:50Z; 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