North Pacific storm

36°23.9′N 159°56.3′W

Waves left about 15 Oct 06:31Z, ± 2 h

Placed by 6 buoys, whose own placements lie within 210 nmi of it

Its swell was last measured at 46243 (Clatsop Spit, OR) on 21 Oct 10:00Z; 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