North Pacific storm

42°50.3′N 157°00.2′W

Waves left about 24 Oct 03:42Z, ± 3 h

Placed by 4 buoys, whose own placements lie within 176 nmi of it

Its swell was last measured at 46082 (Cape Suckling, AK) on 27 Oct 10:20Z; 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