Gulf of Alaska storm

52°49.3′N 152°58.8′W

Waves left about 30 Sep 19:24Z, ± 3 h

Placed by 4 buoys, whose own placements lie within 145 nmi of it

Its swell was last measured at 46084 (Cape Edgecumbe, AK) on 3 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