North Pacific storm

41°57.4′N 142°19.2′W

Waves left about 11 Oct 03:03Z, ± 2 h

Placed by 7 buoys, whose own placements lie within 194 nmi of it

Its swell was last measured at 46054 (West Santa Barbara, CA) on 17 Oct 15:20Z; 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