North Pacific storm

55°25.8′N 148°12.5′E

Waves left about 11 Oct 18:32Z, ± 9 h

Placed by 2 buoys, whose own placements lie within 314 nmi of it

Its swell was last measured at 51101 (Northwestern Hawaii Two) on 19 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