North Pacific storm

42°47.9′N 167°22.7′W

Waves left about 31 Oct 15:18Z, ± 2 h

Placed by 17 buoys, whose own placements lie within 297 nmi of it

Its swell was last measured at 52212 (Ngaraard, Palau) on 9 Nov 21:00Z; 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