North Pacific storm

50°35.5′N 168°18.8′W

Waves left about 16 Oct 17:06Z, ± 3 h

Placed by 4 buoys, whose own placements lie within 287 nmi of it

Its swell was last measured at 46026 (San Francisco, CA) on 23 Oct 01:50Z; 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