North Pacific storm

37°32.3′N 131°31.7′W

Waves left about 18 Oct 10:28Z, ± 3 h

Placed by 3 buoys, whose own placements lie within 253 nmi of it

Its swell was last measured at 46053 (East Santa Barbara, CA) on 20 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