North Pacific storm

30°01.6′N 173°11.3′W

Waves left about 23 Oct 01:00Z, ± 4 h

Placed by 6 buoys, whose own placements lie within 397 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