North Pacific storm

42°18.2′N 155°50.9′W

Waves left about 4 Nov 05:36Z, ± 2 h

Placed by 8 buoys, whose own placements lie within 176 nmi of it

Its swell was last measured at 46076 (Cape Cleare, AK) on 8 Nov 20:50Z; 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