North Pacific storm

51°12.8′N 163°54.1′W

Waves left about 16 Oct 23:45Z, ± 2 h

Placed by 7 buoys, whose own placements lie within 267 nmi of it

Its swell was last measured at 46214 (Point Reyes, CA) on 22 Oct 22:00Z; 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