North Pacific storm

48°38.9′N 154°15.3′W

Waves left about 25 Oct 16:19Z, ± 2 h

Placed by 4 buoys, whose own placements lie within 164 nmi of it

Its swell was last measured at 51001 (NW Hawaii - 200 NM NW of Kauai) on 31 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