Gulf of Alaska storm

51°13.3′N 156°06.5′W

Waves left about 5 Oct 16:50Z, ± 1 h

Placed by 9 buoys, whose own placements lie within 238 nmi of it

Its swell was last measured at 46214 (Point Reyes, CA) on 10 Oct 04:00Z; 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