North Pacific storm

48°36.4′N 142°32.1′W

Waves left about 20 Oct 00:21Z, ± 2 h

Placed by 3 buoys, whose own placements lie within 92 nmi of it

Its swell was last measured at 46089 (Tillamook, OR) on 22 Oct 06:20Z; 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