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
41 min ago
Systems named
296
Swell · wind sea
202 · 94
Seas crossing
2 buoys
Storms, last month
181 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 · 51 min agoAbout 400 nmi to the WSW (244°T)Waves left about 27 Sep 21Z · Swell peaking at 3.1 m · 2 storms in all
West Orca Bay, AK 46060 · Alaska · 51 min agoAbout 650 nmi to the S (180°T)Waves left about 27 Sep 02Z · Swell peaking at 0.5 m
Cape Edgecumbe, AK 46084 · Alaska · 51 min agoAbout 700 nmi to the WSW (245°T)Waves left about 26 Sep 01Z · Swell peaking at 4.2 m
Central Gulf of Alaska 46085 · Alaska · 51 min agoAbout 750 nmi to the WSW (244°T)Waves left about 25 Sep 09Z · Swell peaking at 4.1 m
Cape Cleare, AK 46076 · Alaska · 51 min agoAbout 500 nmi to the S (187°T)Waves left about 25 Sep 05Z · Swell peaking at 2.6 m
Albatross Bank, AK 46078 · Alaska · 51 min agoAbout 2800 nmi to the WSW (237°T)Waves left about 21 Sep 00Z · Swell peaking at 5.2 m