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
26 min ago
Systems named
316
Swell · wind sea
240 · 76
Seas crossing
7 buoys
Storms, last month
211 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
Stonewall Bank, OR 46050 · Pacific Northwest · 1 h agoAbout 800 nmi to the W (268°T)Waves left about 26 Sep 02Z · Swell peaking at 0.9 m · 2 storms in all
Neah Bay, WA 46087 · Pacific Northwest · 3 h agoAbout 750 nmi to the SW (233°T)Waves left about 25 Sep 22Z · Swell peaking at 1.1 m
Cape Elizabeth, WA 46041 · Pacific Northwest · 1 h agoAbout 750 nmi to the SW (221°T)Waves left about 25 Sep 19Z · Swell peaking at 0.8 m · 2 storms in all
Astoria Canyon, OR (179) 46248 · Pacific Northwest · 26 min agoAbout 1800 nmi to the W (276°T)Waves left about 25 Sep 00Z · Groundswell peaking at 3.0 m
Clatsop Spit, OR 46243 · Pacific Northwest · 1 h agoAbout 2100 nmi to the W (260°T)Waves left about 24 Sep 17Z · Groundswell peaking at 1.4 m
Tillamook, OR 46089 · Pacific Northwest · 36 min agoAbout 1200 nmi to the W (259°T)Waves left about 24 Sep 11Z · Swell peaking at 1.9 m
Port Orford, OR 46015 · Pacific Northwest · 1 h agoAbout 2350 nmi to the WNW (303°T)Waves left about 24 Sep 06Z · Swell peaking at 2.6 m
Tillamook Bay South Jetty, OR 46278 · Pacific Northwest · 1 h agoAbout 2400 nmi to the WNW (289°T)Waves left about 24 Sep 05Z · Swell peaking at 2.9 m
Umpqua, OR Offshore 46229 · Pacific Northwest · 1 h agoAbout 2500 nmi to the WNW (297°T)Waves left about 24 Sep 01Z · Swell peaking at 2.6 m
West Oregon 46002 · Pacific Northwest · 1 h agoAbout 3350 nmi to the WNW (295°T)Waves left about 22 Sep 02Z · Swell peaking at 3.2 m
Ocean Station PAPA (166) 46246 · Pacific Northwest · 1 h agoAbout 2950 nmi to the WNW (282°T)Waves left about 21 Sep 13Z · Swell peaking at 3.9 m