North Pacific storm

42°50.6′N 130°59.3′W

Waves left about 15 Oct 00:56Z, ± 2 h

Placed by 3 buoys, whose own placements lie within 75 nmi of it

Its swell was last measured at 46042 (Monterey, CA) on 17 Oct 11:50Z; 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