North Atlantic storm

09°17.5′N 033°39.5′W

Waves left about 1 Oct 03:45Z, ± 12 h

Placed by 2 buoys, whose own placements lie within 237 nmi of it

Its swell was last measured at 41040 (North Equatorial One) on 8 Oct 20:20Z; 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