North Pacific storm

47°34.6′N 153°07.0′W

Waves left about 23 Oct 06:14Z, ± 2 h

Placed by 2 buoys, whose own placements lie within 171 nmi of it

Its swell was last measured at 46026 (San Francisco, CA) on 27 Oct 07:20Z; 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