North Atlantic storm

39°46.9′N 042°27.5′W

Waves left about 23 Oct 06:03Z, ± 6 h

Placed by 3 buoys, whose own placements lie within 236 nmi of it

Its swell was last measured at 44086 (Nags Head, NC) on 27 Oct 17:00Z; 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