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
161 of 163
Newest spectrum
25 min ago
Systems named
302
Swell · wind sea
204 · 98
Seas crossing
4 buoys
Storms, last month
191 placed →
Window
The last 4 days
Method
Reference

The wave systems in each buoy's latest spectrum, largest first, and whether each is building or fading.

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

StationSystems nowSeas crossingStorm placed
North Point, Pohnpei 52213 · Pacific islands · 1 h ago
  • Wind sea0.7 m5 sWNW
  • Swell0.4 m11 sSSE ↓ fading
  • Groundswell0.4 m14 sNNE ↑ building
Pikareej, Arno Atoll, Marshall Islands 52216 · Pacific islands · 1 h ago
  • Wind sea1.1 m10 sENE
About 3750 km to the NNW (336°T)
Rumung, Yap 52214 · Pacific islands · 1 h ago
  • Wind sea0.9 m9 sN ↑ building