This was an impressive storm system to say the least. It was a powerful upper level storm that blasted the entire West Coast. You can see it on the 500 mb maps below.
Check out the atmospheric river on the image below. It was intense over Northern California (heaviest rainfall), however, you can see that the stream weakened before entering into Southern California.
Here are the rain totals for all of California. The first map shows the 24 hour total rainfall, the second is a 7 day total (click to enlarge). I've also included the 14 Day and 60 Day rain totals for all of California.
More rain is headed this way for Tuesday and especially Wednesday. This system doesn't look as organized as the previous storm, so rain totals won't be as impressive. I'll have another update tomorrow.