Thanks for bein a fellow weather geek!
Next question: why, on the doppler radar maps, is there frequently a circular formation of what looks like rain (because its green and yellow), northeast of Rio Vista?? Often on completely dry days, it looks like its raining there. This is a year round deal that I see it. Because of the drought, I have worried every possible storm, as well as wondering what my moto-commute might be like...I keep wanting to ask Prince Charles, I mean, Bill Martin from KTVU about it, should I have a celebrity encounter (he lives in Orinda, so its plausible).