North Pacific storm

38°10.4′N 176°00.5′W

Waves left about 11 Oct 06:08Z, ± 5 h

Placed by 2 buoys, whose own placements lie within 44 nmi of it

Its swell was last measured at 46028 (Cape San Martin, CA) on 18 Oct 10:50Z; 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