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
45 min ago
Systems named
316
Swell · wind sea
208 · 108
Seas crossing
8 buoys
Storms, last month
226 placed →
Window
The last 4 days
Method
Reference

Every buoy by how orderly its largest system is: a narrow directional spread means long crests, as in groundswell; a wide one, short, confused seas.

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

StationLargest systemDirectional spread
Green Beach Offshore 46277 · California · 1 h agoGroundswell 14 s 42° short, confused crests
Tillamook, OR 46089 · Pacific Northwest · 45 min agoSwell 11 s 42° short, confused crests
Pauwela, Maui, HI 51205 · Hawaii · 1 h agoWind sea 10 s 42° short, confused crests
Duck FRF 26 m, NC 44100 · Eastern Seaboard South · 1 h agoWind sea 9 s 43° short, confused crests
South Kodiak, AK 46066 · Alaska · 45 min agoSwell 7 s 43° short, confused crests
NW Hawaii - 200 NM NW of Kauai 51001 · Hawaii · 45 min agoWind sea 8 s 43° short, confused crests
Pikareej, Arno Atoll, Marshall Islands 52216 · Pacific islands · 1 h agoSwell 12 s 43° short, confused crests
Fernandina Beach, FL Offshore 41112 · Eastern Seaboard South · 1 h agoWind sea 10 s 44° short, confused crests
New York Harbor Entrance, NY 44065 · Eastern Seaboard North · 45 min agoSwell 12 s 45° short, confused crests
Caribbean Valley 42060 · Caribbean and tropical Atlantic · 45 min agoWind sea 5 s 45° short, confused crests
W Aleutians (Amchitka), AK 46071 · Alaska · 45 min agoSwell 9 s 45° short, confused crests
Aunuu, American Samoa 51209 · Pacific islands · 1 h agoWind sea 9 s 45° short, confused crests
Oswego, NY 45215 · Great Lakes · 1 h agoWind sea 4 s 46° short, confused crests
Point Loma South, CA 46232 · California · 1 h agoSwell 12 s 46° short, confused crests
Cape Edgecumbe, AK 46084 · Alaska · 45 min agoSwell 9 s 46° short, confused crests
Portland, ME 44007 · Eastern Seaboard North · 45 min agoSwell 8 s 47° short, confused crests
Barbers Point, Kalaeloa, HI (238) 51212 · Hawaii · 1 h agoWind sea 6 s 47° short, confused crests
St. Augustine, FL (194) 41117 · Eastern Seaboard South · 1 h agoWind sea 4 s 48° short, confused crests
Nantucket Offshore, MA 44008 · Eastern Seaboard North · 45 min agoSwell 12 s 50° short, confused crests
SW Hawaii - 200 NM SW of Kona 51002 · Hawaii · 1 h agoSwell 11 s 50° short, confused crests