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 164
Newest spectrum
57 min ago
Systems named
329
Swell · wind sea
225 · 104
Seas crossing
7 buoys
Storms, last month
225 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 13 ft); its width is the directional spread. Swell Wind sea Storm placed

StationWhere the swell came from
Frying Pan Shoals, NC 41013 · Eastern Seaboard South · 57 min agoAbout 650 mi to the ESE (123°T)Waves left about 28 Sep 08Z · Swell peaking at 2.1 ft · 2 storms in all
Canaveral East, FL 41010 · Eastern Seaboard South · 57 min agoAbout 700 mi to the ENE (061°T)Waves left about 27 Sep 23Z · Swell peaking at 1.4 ft
South Hatteras 41002 · Eastern Seaboard South · 57 min agoAbout 700 mi to the SSE (155°T)Waves left about 27 Sep 04Z · Swell peaking at 2.2 ft
South Bermuda 41049 · Eastern Seaboard South · 57 min agoAbout 1900 mi to the NE (034°T)Waves left about 26 Sep 20Z · Groundswell peaking at 4.5 ft
Diamond Shoals, NC 41025 · Eastern Seaboard South · 57 min agoAbout 450 mi to the NNE (021°T)Waves left about 26 Sep 17Z · Swell peaking at 3.9 ft
West Bermuda 41048 · Eastern Seaboard South · 57 min agoAbout 2000 mi to the E (086°T)Waves left about 26 Sep 13Z · Swell peaking at 3.0 ft
Oregon Inlet, NC 44095 · Eastern Seaboard South · 1 h agoAbout 2600 mi to the E (085°T)Waves left about 26 Sep 09Z · Groundswell peaking at 2.2 ft
Nags Head, NC 44086 · Eastern Seaboard South · 1 h agoAbout 3250 mi to the E (082°T)Waves left about 25 Sep 03Z · Groundswell peaking at 2.0 ft
Onslow Bay Outer, NC (217) 41159 · Eastern Seaboard South · 1 h agoAbout 3750 mi to the ESE (109°T)Waves left about 23 Sep 23Z · Swell peaking at 2.2 ft
Hollywood Beach, FL (265) 41122 · Eastern Seaboard South · 1 h agoAbout 2950 mi to the ENE (061°T)Waves left about 23 Sep 05Z · Swell peaking at 2.7 ft
Masonboro Inlet, ILM2, NC (150) 41110 · Eastern Seaboard South · 1 h agoAbout 4600 mi to the ESE (114°T)Waves left about 22 Sep 11Z · Groundswell peaking at 1.4 ft · 2 storms in all
Canaveral, FL 41009 · Eastern Seaboard South · 57 min agoAbout 3300 mi to the ENE (058°T)Waves left about 21 Sep 23Z · Swell peaking at 5.3 ft
St. Augustine, FL (194) 41117 · Eastern Seaboard South · 1 h agoAbout 3350 mi to the ENE (063°T)Waves left about 21 Sep 20Z · Swell peaking at 2.8 ft