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
31 min ago
Systems named
321
Swell · wind sea
225 · 96
Seas crossing
10 buoys
Storms, last month
212 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
Central Aleutians, AK 46072 · Alaska · 31 min agoAbout 750 km to the SE (137°T)Waves left about 29 Sep 01Z · Groundswell peaking at 0.5 m
Portland, ME 44007 · Eastern Seaboard North · 31 min agoAbout 1100 km to the ESE (113°T)Waves left about 28 Sep 16Z · Swell peaking at 0.9 m
Fairweather Ground, AK 46083 · Alaska · 31 min agoAbout 750 km to the WSW (244°T)Waves left about 27 Sep 21Z · Swell peaking at 3.1 m · 3 storms in all
NW Hawaii - 200 NM NW of Kauai 51001 · Hawaii · 31 min agoAbout 1400 km to the S (180°T)Waves left about 27 Sep 17Z · Swell peaking at 2.4 m
Torrey Pines Outer, CA 46225 · California · 51 min agoAbout 3000 km to the W (277°T)Waves left about 27 Sep 07Z · Swell peaking at 1.1 m
Nags Head, NC 44086 · Eastern Seaboard South · 51 min agoAbout 3350 km to the E (082°T)Waves left about 27 Sep 03Z · Groundswell peaking at 0.6 m
Harvest, CA (071) 46218 · California · 51 min agoAbout 2700 km to the NW (305°T)Waves left about 26 Sep 22Z · Groundswell peaking at 2.3 m
Point Loma South, CA 46232 · California · 51 min agoAbout 3550 km to the WSW (244°T)Waves left about 26 Sep 20Z · Groundswell peaking at 1.1 m
Boston, MA 44013 · Eastern Seaboard North · 31 min agoAbout 1350 km to the ENE (072°T)Waves left about 26 Sep 17Z · Swell peaking at 2.0 m
Bodega Bay, CA 46013 · California · 31 min agoAbout 2400 km to the WNW (301°T)Waves left about 26 Sep 17Z · Groundswell peaking at 2.7 m
West Bermuda 41048 · Eastern Seaboard South · 31 min agoAbout 3050 km to the ENE (072°T)Waves left about 26 Sep 17Z · Swell peaking at 0.9 m
Diamond Shoals, NC 41025 · Eastern Seaboard South · 1 h agoAbout 750 km to the NNE (019°T)Waves left about 26 Sep 17Z · Swell peaking at 1.2 m
San Nicolas Island, CA 46219 · California · 51 min agoAbout 3150 km to the NW (307°T)Waves left about 26 Sep 17Z · Groundswell peaking at 2.5 m
Point Arena, CA 46014 · California · 31 min agoAbout 2550 km to the WNW (300°T)Waves left about 26 Sep 10Z · Groundswell peaking at 1.4 m
South Bermuda 41049 · Eastern Seaboard South · 31 min agoAbout 2450 km to the ESE (105°T)Waves left about 26 Sep 10Z · Swell peaking at 0.8 m
Port Orford, OR 46015 · Pacific Northwest · 31 min agoAbout 1400 km to the NW (318°T)Waves left about 26 Sep 08Z · Swell peaking at 1.1 m · 2 storms in all
Diablo Canyon, CA 46215 · California · 51 min agoAbout 3000 km to the WSW (249°T)Waves left about 26 Sep 07Z · Groundswell peaking at 2.3 m
West California 46059 · California · 31 min agoAbout 3300 km to the NW (312°T)Waves left about 26 Sep 07Z · Swell peaking at 2.1 m · 2 storms in all
Northwestern Hawaii Two 51101 · Hawaii · 31 min agoAbout 2750 km to the SSE (154°T)Waves left about 26 Sep 03Z · Swell peaking at 3.6 m · 2 storms in all
Stonewall Bank, OR 46050 · Pacific Northwest · 31 min agoAbout 1450 km to the W (268°T)Waves left about 26 Sep 02Z · Swell peaking at 0.9 m