North Pacific storm

13°58.9′N 150°13.2′W

Waves left about 30 Sep 08:51Z, ± 4 h

Placed by 3 buoys, whose own placements lie within 291 nmi of it

Its swell was last measured at 46229 (Umpqua, OR Offshore) on 6 Oct 00:00Z; 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