North Atlantic storm

35°37.4′N 058°27.4′W

Waves left about 6 Oct 23:51Z, ± 6 h

Placed by 2 buoys, whose own placements lie within 188 nmi of it

Its swell was last measured at 44007 (Portland, ME) on 9 Oct 19:20Z; 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