North Pacific storm

48°55.3′N 144°13.6′W

Waves left about 19 Oct 22:04Z, ± 2 h

Placed by 4 buoys, whose own placements lie within 103 nmi of it

Its swell was last measured at 46050 (Stonewall Bank, OR) on 22 Oct 16:50Z; 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