North Pacific storm

45°28.0′N 164°47.3′E

Waves left about 19 Oct 09:19Z, ± 6 h

Placed by 3 buoys, whose own placements lie within 280 nmi of it

Its swell was last measured at 51201 (Waimea Bay, HI) on 24 Oct 18:00Z; 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