Bluegraph
SIMarineUS

Wave intelligence

The systems in the sea

A buoy's significant wave height sums everything in the sea: long groundswell from a storm a thousand miles off, a closer swell, the chop of the local wind. Each buoy's measured directional spectrum is partitioned into those systems, which are followed through time, used to place the storms the swells came from, and checked for seas that cross.

Stations analysed
160 of 163
Newest spectrum
35 min ago
Systems named
308
Swell · wind sea
212 · 96
Seas crossing
3 buoys
Storms, last month
199 placed →
Window
The last 4 days
Method
Reference

Buoys where the two largest systems now meet at 40° or more with comparable energy, in seas of 1.5 m or more: steeper, less regular waves than the height alone suggests.

Each petal is a system, pointing to where it comes from, north up. Its length grows with height (the ring is 4 m); its width is the directional spread. Swell Wind sea Storm placed

StationCrossingSystems
North Equatorial One 41040 · Caribbean and tropical Atlantic · 45 min ago 55° apartthe smaller holds 65% of the larger's energy
  • Swell1.2 m10 sE ↑ building
  • Groundswell0.9 m15 sNNE ↑ building