North Pacific storm

28°46.6′N 160°40.4′E

Waves left about 21 Oct 20:32Z, ± 4 h

Placed by 7 buoys, whose own placements lie within 437 nmi of it

Its swell is still arriving: last measured at 46059 (West California) on 29 Oct 14:50Z.

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