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
162 of 164
Newest spectrum
31 min ago
Systems named
314
Swell · wind sea
214 · 100
Seas crossing
5 buoys
Storms, last month
210 placed →
Window
The last 4 days
Method
Reference

Swells whose arrival places the storm that raised them, found over the last four days: how far off it was, in which direction, and when the waves left.

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

StationWhere the swell came from
South Bermuda 41049 · Eastern Seaboard South · 41 min agoAbout 2350 km to the NNE (033°T)Waves left about 27 Sep 15Z · Groundswell peaking at 1.4 m
Diamond Shoals, NC 41025 · Eastern Seaboard South · 1 h agoAbout 700 km to the NNE (021°T)Waves left about 26 Sep 19Z · Swell peaking at 1.2 m
West Bermuda 41048 · Eastern Seaboard South · 1 h agoAbout 3100 km to the ENE (075°T)Waves left about 26 Sep 16Z · Swell peaking at 0.9 m
Oregon Inlet, NC 44095 · Eastern Seaboard South · 51 min agoAbout 2300 km to the E (086°T)Waves left about 26 Sep 03Z · Swell peaking at 0.6 m
Fort Pierce, FL (134) 41114 · Eastern Seaboard South · 51 min agoAbout 2200 km to the NE (044°T)Waves left about 25 Sep 09Z · Groundswell peaking at 1.1 m
Fernandina Beach, FL Offshore 41112 · Eastern Seaboard South · 51 min agoAbout 4750 km to the E (083°T)Waves left about 22 Sep 14Z · Swell peaking at 0.8 m
Canaveral, FL 41009 · Eastern Seaboard South · 41 min agoAbout 4850 km to the NE (055°T)Waves left about 22 Sep 12Z · Swell peaking at 1.9 m
St. Augustine, FL (194) 41117 · Eastern Seaboard South · 51 min agoAbout 5250 km to the ENE (063°T)Waves left about 22 Sep 02Z · Swell peaking at 1.4 m
Hollywood Beach, FL (265) 41122 · Eastern Seaboard South · 51 min agoAbout 5800 km to the ENE (064°T)Waves left about 21 Sep 23Z · Groundswell peaking at 0.8 m