North Pacific storm

46°04.4′N 139°41.5′W

Waves left about 30 Sep 01:19Z, ± 2 h

Placed by 2 buoys, whose own placements lie within 136 nmi of it

Its swell was last measured at 46005 (West Washington) on 1 Oct 17:20Z; 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