Bob Johnson wrote:
I took the liberty of truncating your url and came up with this record:
http://www.weather.nps.navy.mil/profiler/r07_sfc.gif

Those are surface measurements from a normal set of surface weather
sensors. The one you mention is surface wind direction, the dramatic
changes being onshore/offshore sea-breeze flow since the site is located
within 2 miles of the ocean.


--
Dr. John W. (Jack) Glendening Meteorologist