North Pacific storm

37°57.4′N 174°00.7′W

Waves left about 8 Oct 22:00Z, ± 3 h

Placed by 3 buoys, whose own placements lie within 262 nmi of it

Its swell was last measured at 46211 (Grays Harbor, WA) on 14 Oct 06:00Z; 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