North Pacific storm

48°43.7′N 136°07.0′W

Waves left about 20 Oct 06:27Z, ± 2 h

Placed by 4 buoys, whose own placements lie within 99 nmi of it

Its swell was last measured at 46027 (St Georges, CA) on 22 Oct 17:50Z; 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