Bluegraph
SIMarineUS

Storms placed by their swell

North Pacific storm

45°37.4′N 168°54.8′E

Waves left about 23 Oct 08:35Z, ± 4 h

Placed by 7 buoys, whose own placements lie within 363 nmi of it

Its swell was last measured at 51214 (King-Poloa, American Samoa) on 2 Nov 09:00Z; 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