North Atlantic storm

48°44.5′N 054°30.7′W

Waves left about 17 Oct 03:06Z, ± 3 h

Placed by 3 buoys, whose own placements lie within 142 nmi of it

Its swell was last measured at 41040 (North Equatorial One) on 22 Oct 20:56Z; 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