North Pacific storm

30°46.9′N 171°32.1′W

Waves left about 22 Oct 23:48Z, ± 4 h

Placed by 3 buoys, whose own placements lie within 238 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