North Pacific storm

30°27.1′N 143°52.1′E

Waves left about 6 Oct 00:52Z, ± 3 h

Placed by 7 buoys, whose own placements lie within 339 nmi of it

Its swell was last measured at 46089 (Tillamook, OR) on 15 Oct 01:20Z; 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