North Pacific storm

39°39.7′N 150°14.9′W

Waves left about 26 Oct 13:04Z, ± 6 h

Placed by 2 buoys, whose own placements lie within 222 nmi of it

Its swell was last measured at 46214 (Point Reyes, CA) on 28 Oct 22:00Z; 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