North Pacific storm

48°23.8′N 150°47.2′W

Waves left about 14 Oct 08:50Z, ± 2 h

Placed by 5 buoys, whose own placements lie within 112 nmi of it

Its swell was last measured at 46029 (Columbia River Bar, OR) on 17 Oct 08:50Z; 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