North Pacific storm

38°13.1′N 177°36.5′W

Waves left about 30 Oct 00:46Z, ± 3 h

Placed by 4 buoys, whose own placements lie within 254 nmi of it

Its swell was last measured at 46248 (Astoria Canyon, OR (179)) on 5 Nov 11:00Z; 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