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
33 min ago
Systems named
309
Swell · wind sea
208 · 101
Seas crossing
9 buoys
Storms, last month
219 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
Western Hawaii 51003 · Hawaii · 43 min agoSwell 9 s 27° moderate crests
Pauwela, Maui, HI 51205 · Hawaii · 33 min agoWind sea 8 s 31° moderate crests
Northwestern Hawaii Two 51101 · Hawaii · 43 min agoWind sea 8 s 32° moderate crests
Northern Hawaii One 51000 · Hawaii · 43 min agoSwell 9 s 33° moderate crests
Hilo, HI 51206 · Hawaii · 33 min agoWind sea 9 s 34° moderate crests
Pearl Harbor Entrance, HI (233) 51211 · Hawaii · 1 h agoWind sea 6 s 34° moderate crests
Mokapu Point, Oahu, HI 51202 · Hawaii · 33 min agoWind sea 9 s 36° moderate crests
SE Hawaii - 200 NM SE of Hilo 51004 · Hawaii · 43 min agoSwell 9 s 37° moderate crests
SW Hawaii - 200 NM SW of Kona 51002 · Hawaii · 1 h agoGroundswell 13 s 42° short, confused crests
Barbers Point, Kalaeloa, HI (238) 51212 · Hawaii · 1 h agoWind sea 6 s 46° short, confused crests
NW Hawaii - 200 NM NW of Kauai 51001 · Hawaii · 43 min agoWind sea 7 s 46° short, confused crests
Waimea Bay, HI 51201 · Hawaii · 33 min agoWind sea 6 s 50° short, confused crests