Gulf of Alaska storm

52°57.7′N 141°21.2′W

Waves left about 24 Oct 08:08Z, ± 3 h

Placed by 2 buoys, whose own placements lie within 172 nmi of it

Its swell was last measured at 46229 (Umpqua, OR Offshore) on 26 Oct 09:00Z; 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