Update 2/9/2009: We have had our next snow (3 years, almost to the day, later). You can view photos and read descriptions at http://tablascreek.typepad.com/tablas/2009/02/snow-in-the-vineyard.html
Every 5 years or so, it does snow in Paso Robles. This weekend, we got a few inches of snow as a cold front dipped through Central California and snow appeared at elevations as low as 1000 feet above sea level.
The snow and the accompanying cold weather (temperatures on Sunday and Monday nights were in the low 20s) are welcome; the winter had been unusually warm, and we were worried that we might see budbreak in March or early April... while there was still danger of frost.