North Pacific storm

46°39.4′N 146°45.7′W

Waves left about 19 Oct 14:19Z, ± 2 h

Placed by 5 buoys, whose own placements lie within 79 nmi of it

Its swell was last measured at 46013 (Bodega Bay, CA) on 22 Oct 06:50Z; 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