You must be looking at virtual buoys. I'm sure the Del. buoy is not equiped w/ wave direction instrumentation since it never provides that specific type of infor. Virgina buoy does. As for the Manasquan bouy, never heard of one.
how come the swell looks more east in central jersey than south jersey ie manasquan bouy is reading 108 when Atlantic city reads 128 ?
long period swell is greatly affected by the ocean bottom/continential shelf. central jersey shelf generally faces ESE while the shore from AC south generally faces SSE. When long period offshore swell hits the shelf, the tendancy is for the swell lines to bend and become parallel with the shelf orientation. So its sounds like in your example the swell had been bent 20 degrees.
I couldnt find a diagram for the east coast, but notice how this diagram shows a straight west swell (the blue lines) bending in nearly shore parallel in california...
Last edited by mitchell; Sep 15, 2010 at 07:19 PM.