North Pacific storm

51°19.3′N 174°09.3′W

Waves left about 21 Oct 05:07Z, ± 2 h

Placed by 6 buoys, whose own placements lie within 282 nmi of it

Its swell was last measured at 46054 (West Santa Barbara, CA) on 28 Oct 02:50Z; 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