North Pacific storm

20°18.2′N 176°47.8′E

Waves left about 4 Oct 09:44Z, ± 6 h

Placed by 2 buoys, whose own placements lie within 206 nmi of it

Its swell was last measured at 51002 (SW Hawaii - 200 NM SW of Kona) on 7 Oct 20:20Z; 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