North Atlantic storm

34°07.6′N 073°01.1′W

Waves left about 19 Oct 13:08Z, ± 2 h

Placed by 4 buoys, whose own placements lie within 129 nmi of it

Its swell was last measured at 41009 (Canaveral, FL) on 21 Oct 15:50Z; 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