North Pacific storm

47°24.4′N 172°55.3′E

Waves left about 20 Oct 18:56Z, ± 3 h

Placed by 3 buoys, whose own placements lie within 386 nmi of it

Its swell was last measured at 51002 (SW Hawaii - 200 NM SW of Kona) on 27 Oct 18:50Z; 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