North Pacific storm

43°58.6′N 161°03.0′W

Waves left about 9 Nov 19:02Z, ± 3 h

Placed by 3 buoys, whose own placements lie within 272 nmi of it

Its swell is still arriving: last measured at 51004 (SE Hawaii - 200 NM SE of Hilo) on 13 Nov 05:50Z.

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