North Pacific storm

25°20.2′N 118°28.7′W

Waves left about 10 Oct 16:38Z, ± 2 h

Placed by 4 buoys, whose own placements lie within 138 nmi of it

Its swell was last measured at 46082 (Cape Suckling, AK) on 17 Oct 09:20Z; 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