North Atlantic storm

40°55.1′N 047°41.4′W

Waves left about 11 Oct 02:20Z, ± 5 h

Placed by 2 buoys, whose own placements lie within 148 nmi of it

Its swell was last measured at 41041 (North Equatorial Two) on 15 Oct 12:20Z; 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