North Pacific storm

48°27.8′N 156°57.0′W

Waves left about 5 Oct 18:23Z, ± 2 h

Placed by 10 buoys, whose own placements lie within 186 nmi of it

Its swell was last measured at 46026 (San Francisco, CA) on 16 Oct 06:20Z; 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