Non here today, at least non i can see as there low clouds. Air traffic along the moorpark arrival has been very light.
When you say "None here today", you mean that you see no contrails, today? OK...I also live in Southern California, in the Los Angeles area specifically. You mentioned the "MoorPark Arrival"?
Here is the STAR: http://flightaware.com/resources/airport/KLAX/STAR/MOORPARK+THREE
NOW...I could take a lot of time explaining this to you, here. But...to keep it simple....you will not "always" see contrails. This is a fact. Also, you must understand that, just as you do NOT see contrails from airliners taking off, and landing at low altitudes, at airports, you also won't see contrails below certain altitudes. Correct?
Again....I would be VERY happy to help you to learn more, and to 'teach' you on this topic.
Keep in mind that as I live here, in the Southern California area, I hear on the weather news that rain is on our way. This, I write as of 25 February, 2014 at 2308 UTC.