North Pacific storm

55°39.5′N 161°21.8′E

Waves left about 13 Oct 09:48Z, ± 9 h

Placed by 2 buoys, whose own placements lie within 214 nmi of it

Its swell was last measured at 51001 (NW Hawaii - 200 NM NW of Kauai) on 19 Oct 21:50Z; 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