Gulf of Alaska storm

57°08.2′N 156°40.3′W

Waves left about 22 Oct 20:38Z, ± 2 h

Placed by 4 buoys, whose own placements lie within 308 nmi of it

Its swell was last measured at 46213 (Cape Mendocino, CA (094)) on 28 Oct 01:00Z; 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