North Pacific storm

02°30.2′N 150°27.1′W

Waves left about 21 Oct 19:17Z, ± 5 h

Placed by 2 buoys, whose own placements lie within 160 nmi of it

Its swell was last measured at 46047 (Tanner Bank, CA) on 27 Oct 23:20Z; 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