Gulf of Alaska storm

54°39.4′N 143°58.6′W

Waves left about 24 Oct 03:38Z, ± 2 h

Placed by 4 buoys, whose own placements lie within 238 nmi of it

Its swell was last measured at 46014 (Point Arena, CA) on 27 Oct 21:20Z; 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