North Pacific storm

41°07.2′N 147°43.4′W

Waves left about 7 Nov 08:42Z, ± 2 h

Placed by 10 buoys, whose own placements lie within 163 nmi of it

Its swell was last measured at 46243 (Clatsop Spit, OR) on 10 Nov 08:00Z; 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