North Pacific storm

34°51.5′N 178°44.0′W

Waves left about 27 Oct 18:59Z, ± 7 h

Placed by 2 buoys, whose own placements lie within 146 nmi of it

Its swell was last measured at 51201 (Waimea Bay, HI) on 1 Nov 07:00Z; 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