North Atlantic storm

36°21.3′N 047°24.9′W

Waves left about 1 Oct 17:45Z, ± 7 h

Placed by 4 buoys, whose own placements lie within 221 nmi of it

Its swell was last measured at 44007 (Portland, ME) on 6 Oct 19:50Z; 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