North Pacific storm

51°00.9′N 171°42.7′W

Waves left about 4 Nov 14:46Z, ± 3 h

Placed by 4 buoys, whose own placements lie within 179 nmi of it

Its swell was last measured at 46047 (Tanner Bank, CA) on 9 Nov 12:50Z; 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