North Pacific storm

30°25.4′N 160°11.7′W

Waves left about 27 Oct 17:13Z, ± 5 h

Placed by 2 buoys, whose own placements lie within 122 nmi of it

Its swell was last measured at 46087 (Neah Bay, WA) on 1 Nov 15:39Z; 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