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
34 min ago
Systems named
300
Swell · wind sea
197 · 103
Seas crossing
4 buoys
Storms, last month
205 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
Fairweather Ground, AK 46083 · Alaska · 44 min agoAbout 750 km to the WSW (244°T)Waves left about 27 Sep 21Z · Swell peaking at 3.1 m · 2 storms in all
Seal Rocks, AK 46061 · Alaska · 44 min agoAbout 850 km to the SE (129°T)Waves left about 27 Sep 19Z · Swell peaking at 0.8 m
West Orca Bay, AK 46060 · Alaska · 44 min agoAbout 1200 km to the S (180°T)Waves left about 27 Sep 02Z · Swell peaking at 0.5 m
Cape Edgecumbe, AK 46084 · Alaska · 44 min agoAbout 1300 km to the WSW (245°T)Waves left about 26 Sep 01Z · Swell peaking at 4.2 m
Portlock Bank, AK 46080 · Alaska · 44 min agoAbout 3600 km to the SSW (208°T)Waves left about 23 Sep 23Z · Swell peaking at 2.4 m
Albatross Bank, AK 46078 · Alaska · 44 min agoAbout 3950 km to the WSW (239°T)Waves left about 22 Sep 21Z · Swell peaking at 5.2 m
Cape Suckling, AK 46082 · Alaska · 44 min agoAbout 4900 km to the SSW (212°T)Waves left about 22 Sep 15Z · Swell peaking at 2.9 m