North Pacific storm

49°08.1′N 151°05.5′W

Waves left about 3 Oct 04:34Z, ± 2 h

Placed by 12 buoys, whose own placements lie within 156 nmi of it

Its swell was last measured at 46028 (Cape San Martin, CA) on 8 Oct 06:20Z; 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