North Pacific storm

43°47.3′N 136°03.2′W

Waves left about 18 Oct 03:44Z, ± 2 h

Placed by 3 buoys, whose own placements lie within 256 nmi of it

Its swell was last measured at 46215 (Diablo Canyon, CA) on 20 Oct 10:40Z; 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