North Pacific storm

48°14.8′N 154°44.2′W

Waves left about 17 Oct 17:52Z, ± 1 h

Placed by 10 buoys, whose own placements lie within 197 nmi of it

Its swell was last measured at 46047 (Tanner Bank, CA) on 23 Oct 09:50Z; 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