North Pacific storm

49°03.4′N 143°41.0′W

Waves left about 27 Sep 00:25Z, ± 2 h

Placed by 8 buoys, whose own placements lie within 268 mi of it

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