The Weathermen's Brains, Dr. M P Renfrew's cartoonIn today’s Area Forecast Discussion,* the National Weather Service Oxnard said, “WE HAVE HAD ALMOST A WEEK OF SOLID OFFSHORE FLOW WITH HUMIDITIES LESS THAN 20%”:
Sunday 1/20/13 2 p.m. (Look at arrows along coastline, the daily afternoon High-pressure pattern):
Sunday 1-20-13 2 p.m.  Offshore winds blowing West at the shore (called 'offshore flow') weatherflow.com mapThanks to weatherflow for making these maps, http://d.weatherflow.com/navair/wshr68.png.

sea-land-breeze

*http://www.wrh.noaa.gov/total_forecast/getprod.php?prod=XXXAFDLOX&wfo=LOX