Gulf of Alaska storm

52°48.1′N 159°40.6′W

Waves left about 26 Oct 05:15Z, ± 3 h

Placed by 2 buoys, whose own placements lie within 74 nmi of it

Its swell was last measured at 46080 (Portlock Bank, AK) on 28 Oct 15:50Z; 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