North Pacific storm

38°36.3′N 129°17.7′W

Waves left about 6 Nov 17:43Z, ± 2 h

Placed by 4 buoys, whose own placements lie within 296 nmi of it

Its swell was last measured at 46061 (Seal Rocks, AK) on 9 Nov 09:50Z; 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