North Atlantic storm

60°53.9′N 022°56.1′W

Waves left about 4 Nov 02:50Z, ± 3 h

Placed by 2 buoys, whose own placements lie within 284 nmi of it

Its swell was last measured at 41040 (North Equatorial One) on 12 Nov 04:50Z; 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