North Atlantic storm

29°44.5′N 042°51.2′W

Waves left about 22 Oct 20:46Z, ± 7 h

Placed by 3 buoys, whose own placements lie within 177 nmi of it

Its swell is still arriving: last measured at 44095 (Oregon Inlet, NC) on 29 Oct 03:44Z.

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