North Pacific storm

46°17.2′N 152°48.8′W

Waves left about 18 Oct 02:59Z, ± 2 h

Placed by 8 buoys, whose own placements lie within 240 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