pres = 6-Hourly Pressure at Surface
http://portal.sf.utas.edu.au/thredds/ncss/ncep2/surface/pres.sfc/pres.sfc.2004.nc?latitude=&longitude=&time_start=2004-01-01T00%3A00%3A00Z&time_end=2004-12-31T18%3A00%3A00Z&accept=xml