North Pacific storm

33°57.2′N 147°00.5′W

Waves left about 3 Nov 00:49Z, ± 5 h

Placed by 2 buoys, whose own placements lie within 20 nmi of it

Its swell was last measured at 46061 (Seal Rocks, AK) on 8 Nov 22:50Z; 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