North Pacific storm

48°20.3′N 145°22.4′W

Waves left about 6 Oct 14:30Z, ± 1 h

Placed by 9 buoys, whose own placements lie within 287 nmi of it

Its swell was last measured at 46214 (Point Reyes, CA) on 9 Oct 23:00Z; 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