North Pacific storm

41°09.1′N 139°26.2′W

Waves left about 24 Oct 22:14Z, ± 2 h

Placed by 3 buoys, whose own placements lie within 280 nmi of it

Its swell was last measured at 46029 (Columbia River Bar, OR) on 27 Oct 14:20Z; 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