North Pacific storm

39°30.7′N 161°02.5′W

Waves left about 22 Oct 22:57Z, ± 2 h

Placed by 9 buoys, whose own placements lie within 281 nmi of it

Its swell was last measured at 46254 (Scripps Nearshore, CA) on 28 Oct 06:06Z; 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