Gulf of Alaska storm

51°03.2′N 157°36.0′W

Waves left about 24 Oct 16:10Z, ± 3 h

Placed by 3 buoys, whose own placements lie within 219 nmi of it

Its swell is still arriving: last measured at 46219 (San Nicolas Island, CA) on 29 Oct 14:29Z.

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