North Pacific storm

42°13.0′N 175°23.0′W

Waves left about 13 Oct 09:19Z, ± 5 h

Placed by 2 buoys, whose own placements lie within 283 nmi of it

Its swell was last measured at 46085 (Central Gulf of Alaska) on 19 Oct 07:50Z; 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