North Pacific storm

30°19.7′N 129°12.0′W

Waves left about 30 Oct 12:13Z, ± 2 h

Placed by 4 buoys, whose own placements lie within 187 nmi of it

Its swell was last measured at 46082 (Cape Suckling, AK) on 6 Nov 03:50Z; 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