North Pacific storm

20°52.2′N 161°21.1′W

Waves left about 16 Oct 12:36Z, ± 3 h

Placed by 4 buoys, whose own placements lie within 331 nmi of it

Its swell was last measured at 46237 (San Francisco Bar, CA (142)) on 23 Oct 08:00Z; 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