North Pacific storm

42°17.3′N 155°05.2′E

Waves left about 22 Oct 06:43Z, ± 3 h

Placed by 6 buoys, whose own placements lie within 408 nmi of it

Its swell was last measured at 51000 (Northern Hawaii One) on 28 Oct 22:50Z; 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