Gulf of Alaska storm

51°50.6′N 151°46.7′W

Waves left about 31 Oct 14:45Z, ± 2 h

Placed by 5 buoys, whose own placements lie within 274 nmi of it

Its swell was last measured at 51202 (Mokapu Point, Oahu, HI) on 4 Nov 23:00Z; 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