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
27 min ago
Systems named
303
Swell · wind sea
215 · 88
Seas crossing
6 buoys
Storms, last month
208 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
Port Orford, OR 46015 · Pacific Northwest · 37 min agoAbout 850 mi to the NW (320°T)Waves left about 26 Sep 08Z · Swell peaking at 3.8 ft · 2 storms in all
Stonewall Bank, OR 46050 · Pacific Northwest · 1 h agoAbout 850 mi to the W (268°T)Waves left about 26 Sep 06Z · Swell peaking at 2.8 ft
Neah Bay, WA 46087 · Pacific Northwest · 2 h agoAbout 800 mi to the SW (234°T)Waves left about 25 Sep 23Z · Swell peaking at 3.6 ft
Cape Elizabeth, WA 46041 · Pacific Northwest · 1 h agoAbout 950 mi to the SW (221°T)Waves left about 25 Sep 16Z · Swell peaking at 2.7 ft · 2 storms in all
Clatsop Spit, OR 46243 · Pacific Northwest · 1 h agoAbout 2400 mi to the W (260°T)Waves left about 24 Sep 17Z · Groundswell peaking at 4.6 ft
Tillamook, OR 46089 · Pacific Northwest · 1 h agoAbout 1350 mi to the W (259°T)Waves left about 24 Sep 15Z · Swell peaking at 6.1 ft
Tillamook Bay South Jetty, OR 46278 · Pacific Northwest · 1 h agoAbout 2750 mi to the WNW (289°T)Waves left about 24 Sep 05Z · Swell peaking at 9.6 ft
Umpqua, OR Offshore 46229 · Pacific Northwest · 1 h agoAbout 2850 mi to the WNW (297°T)Waves left about 24 Sep 01Z · Swell peaking at 8.4 ft
West Oregon 46002 · Pacific Northwest · 1 h agoAbout 3800 mi to the WNW (296°T)Waves left about 22 Sep 03Z · Swell peaking at 10.6 ft
Ocean Station PAPA (166) 46246 · Pacific Northwest · 27 min agoAbout 3400 mi to the WNW (282°T)Waves left about 21 Sep 12Z · Swell peaking at 12.9 ft