North Pacific storm

42°54.7′N 148°09.3′E

Waves left about 22 Oct 00:25Z, ± 3 h

Placed by 6 buoys, whose own placements lie within 549 nmi of it

Its swell is still arriving: last measured at 51003 (Western Hawaii) on 29 Oct 13:50Z.

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