North Pacific storm

41°56.6′N 138°54.4′W

Waves left about 25 Oct 04:28Z, ± 3 h

Placed by 3 buoys, whose own placements lie within 136 nmi of it

Its swell was last measured at 46219 (San Nicolas Island, CA) on 28 Oct 00:00Z; 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