North Pacific storm

42°43.9′N 178°17.6′W

Waves left about 7 Oct 12:42Z, ± 3 h

Placed by 5 buoys, whose own placements lie within 237 nmi of it

Its swell was last measured at 46027 (St Georges, CA) on 13 Oct 13:32Z; 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