North Atlantic storm

39°16.1′N 046°01.3′W

Waves left about 14 Oct 21:46Z, ± 4 h

Placed by 3 buoys, whose own placements lie within 143 nmi of it

Its swell was last measured at 41046 (East Bahamas) on 19 Oct 11:20Z; 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