North Pacific storm

43°42.1′N 132°30.6′W

Waves left about 15 Oct 03:20Z, ± 2 h

Placed by 4 buoys, whose own placements lie within 113 nmi of it

Its swell was last measured at 46027 (St Georges, CA) on 17 Oct 14:20Z; 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