Bluegraph
SIMarineUS

Storms placed by their swell

South Pacific storm

07°30.4′S 171°45.5′E

Waves left about 5 Oct 19:12Z, ± 10 h

Placed by 2 buoys, whose own placements lie within 778 nmi of it

Its swell was last measured at 46243 (Clatsop Spit, OR) on 15 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