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
49 min ago
Systems named
329
Swell · wind sea
216 · 113
Seas crossing
8 buoys
Storms, last month
228 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
Cape Elizabeth, WA 46041 · Pacific Northwest · 59 min agoAbout 950 km to the W (259°T)Waves left about 26 Sep 13Z · Swell peaking at 0.8 m · 2 storms in all
Neah Bay, WA 46087 · Pacific Northwest · 3 h agoAbout 1050 km to the WSW (248°T)Waves left about 26 Sep 10Z · Swell peaking at 1.1 m
Stonewall Bank, OR 46050 · Pacific Northwest · 59 min agoAbout 1400 km to the W (264°T)Waves left about 26 Sep 06Z · Swell peaking at 0.8 m · 2 storms in all
Astoria Canyon, OR (179) 46248 · Pacific Northwest · 49 min agoAbout 2650 km to the WNW (287°T)Waves left about 25 Sep 19Z · Groundswell peaking at 3.0 m
Grays Harbor, WA 46211 · Pacific Northwest · 49 min agoAbout 3450 km to the W (275°T)Waves left about 25 Sep 03Z · Groundswell peaking at 2.6 m
Clatsop Spit, OR 46243 · Pacific Northwest · 1 h agoAbout 3700 km to the W (261°T)Waves left about 24 Sep 22Z · Groundswell peaking at 1.4 m
Tillamook, OR 46089 · Pacific Northwest · 59 min agoAbout 2150 km to the W (260°T)Waves left about 24 Sep 14Z · Swell peaking at 1.9 m · 2 storms in all
Tillamook Bay South Jetty, OR 46278 · Pacific Northwest · 49 min agoAbout 4250 km to the WNW (289°T)Waves left about 24 Sep 11Z · Swell peaking at 2.9 m
West Oregon 46002 · Pacific Northwest · 59 min agoAbout 2600 km to the WNW (286°T)Waves left about 23 Sep 12Z · Swell peaking at 1.4 m · 2 storms in all
Umpqua, OR Offshore 46229 · Pacific Northwest · 1 h agoAbout 5600 km to the WNW (297°T)Waves left about 23 Sep 02Z · Swell peaking at 2.6 m
Port Orford, OR 46015 · Pacific Northwest · 59 min agoAbout 6250 km to the WNW (303°T)Waves left about 22 Sep 08Z · Swell peaking at 2.6 m
Columbia River Bar, OR 46029 · Pacific Northwest · 59 min agoAbout 7400 km to the WNW (294°T)Waves left about 21 Sep 00Z · Swell peaking at 3.0 m