North Atlantic storm

14°06.4′N 056°02.0′W

Waves left about 19 Oct 01:56Z, ± 3 h

Placed by 2 buoys, whose own placements lie within 213 nmi of it

Its swell was last measured at 41044 (NE St Martin) on 21 Oct 05:50Z; 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