North Atlantic storm

20°58.0′N 043°35.9′W

Waves left about 20 Oct 03:27Z, ± 5 h

Placed by 2 buoys, whose own placements lie within 270 nmi of it

Its swell was last measured at 41040 (North Equatorial One) on 22 Oct 14:20Z; 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