North Atlantic storm

41°43.0′N 055°31.1′W

Waves left about 22 Oct 08:08Z, ± 3 h

Placed by 4 buoys, whose own placements lie within 243 nmi of it

Its swell was last measured at 41025 (Diamond Shoals, NC) on 25 Oct 16:50Z; 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