North Pacific storm

10°55.9′N 116°33.0′W

Waves left about 30 Sep 17:47Z, ± 6 h

Placed by 2 buoys, whose own placements lie within 252 nmi of it

Its swell was last measured at 46047 (Tanner Bank, CA) on 4 Oct 00:50Z; 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