Luckily, there was a snow storm in Cuyamaca Rancho State Park in San Diego County; about 1 hour from San Diego. When I got there, it was still snowing. The snow brought a fantastic winter atmosphere in the high desert country. The wildfire burned a large part of its forest in 2003. The survived trees and snow creates an interesting contrast.
Cuyamaca Mountain isn't as high as Sierras, so snow would last only a few days. I enjoyed unexpexted snow near home.