North Pacific storm

37°30.8′N 173°30.2′E

Waves left about 23 Oct 10:53Z, ± 4 h

Placed by 4 buoys, whose own placements lie within 438 nmi of it

Its swell was last measured at 46229 (Umpqua, OR Offshore) on 28 Oct 19:00Z; 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