North Atlantic storm

30°31.4′N 071°15.2′W

Waves left about 2 Nov 19:35Z, ± 5 h

Placed by 2 buoys, whose own placements lie within 139 nmi of it

Its swell was last measured at 44025 (Long Island, NY) on 6 Nov 00:10Z; 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