North Pacific storm

42°10.6′N 146°06.4′E

Waves left about 21 Oct 15:45Z, ± 4 h

Placed by 6 buoys, whose own placements lie within 492 nmi of it

Its swell was last measured at 51212 (Barbers Point, Kalaeloa, HI (238)) on 30 Oct 17:00Z; 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