North Pacific storm

31°15.8′N 172°56.2′W

Waves left about 23 Oct 03:31Z, ± 4 h

Placed by 5 buoys, whose own placements lie within 228 nmi of it

Its swell was last measured at 46059 (West California) on 28 Oct 18:20Z; 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