North Pacific storm

41°08.7′N 147°42.1′E

Waves left about 1 Oct 23:00Z, ± 6 h

Placed by 4 buoys, whose own placements lie within 262 nmi of it

Its swell was last measured at 51002 (SW Hawaii - 200 NM SW of Kona) on 10 Oct 03:20Z; 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