North Pacific storm

11°22.5′N 171°26.0′W

Waves left about 30 Sep 04:42Z, ± 5 h

Placed by 2 buoys, whose own placements lie within 286 nmi of it

Its swell was last measured at 51001 (NW Hawaii - 200 NM NW of Kauai) on 4 Oct 10:20Z; 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