North Pacific storm

36°51.1′N 138°56.6′W

Waves left about 21 Oct 12:05Z, ± 3 h

Placed by 4 buoys, whose own placements lie within 237 nmi of it

Its swell was last measured at 46082 (Cape Suckling, AK) on 25 Oct 19:20Z; 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