North Pacific storm

27°26.3′N 146°23.7′E

Waves left about 20 Oct 04:54Z, ± 5 h

Placed by 4 buoys, whose own placements lie within 446 nmi of it

Its swell was last measured at 46089 (Tillamook, OR) on 28 Oct 12:50Z; 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