North Pacific storm

30°01.1′N 140°05.9′W

Waves left about 28 Oct 23:39Z, ± 4 h

Placed by 2 buoys, whose own placements lie within 141 nmi of it

Its swell was last measured at 46053 (East Santa Barbara, CA) on 1 Nov 07:50Z; 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