North Atlantic storm

23°30.7′N 047°56.5′W

Waves left about 30 Oct 10:48Z, ± 4 h

Placed by 4 buoys, whose own placements lie within 261 nmi of it

Its swell was last measured at 44011 (Georges Bank, MA) on 5 Nov 12:50Z; 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