Gulf of Alaska storm

56°54.1′N 137°23.2′W

Waves left about 22 Oct 18:33Z, ± 3 h

Placed by 3 buoys, whose own placements lie within 133 nmi of it

Its swell was last measured at 46022 (Eel River, CA) on 25 Oct 09:50Z; 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