North Pacific storm

39°02.2′N 148°13.2′E

Waves left about 2 Oct 01:35Z, ± 3 h

Placed by 6 buoys, whose own placements lie within 456 nmi of it

Its swell was last measured at 46278 (Tillamook Bay South Jetty, OR) on 12 Oct 05:00Z; 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