Bluegraph
SIMarineUS

Storms placed by their swell

North Pacific storm

02°08.5′N 171°45.9′E

Waves left about 21 Oct 11:15Z, ± 6 h

Placed by 6 buoys, whose own placements lie within 609 nmi of it

Its swell was last measured at 46222 (San Pedro, CA) on 30 Oct 16:00Z; 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