North Atlantic storm

37°45.2′N 037°12.5′W

Waves left about 1 Nov 18:53Z, ± 7 h

Placed by 2 buoys, whose own placements lie within 102 nmi of it

Its swell was last measured at 41044 (NE St Martin) on 6 Nov 12:50Z; 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