Gulf of Alaska storm

55°04.1′N 153°46.2′W

Waves left about 8 Oct 04:03Z, ± 3 h

Placed by 2 buoys, whose own placements lie within 66 nmi of it

Its swell was last measured at 46082 (Cape Suckling, AK) on 10 Oct 07:50Z; 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