North Pacific storm

46°34.6′N 142°56.8′W

Waves left about 15 Oct 03:37Z, ± 3 h

Placed by 4 buoys, whose own placements lie within 238 nmi of it

Its swell was last measured at 46050 (Stonewall Bank, OR) 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