Bundle up, folks. The entire Bay Area is expected to freeze over starting tomorrow. In addition to the anticipated rainfall and ninth-circle-of-hell cold weather, the weather service suggests that that snow levels could drop "as low as 2,000 feet on Saturday and Sunday and possibly as low as 1,500 feet by Monday." That is to say, areas in the Santa Cruz Mountains and the North Bay hills could be affected by snowfall, so anticipate road closures. Check back at Weather Underground throughout the weekend for up to the second forecasts. (Temperatures could dip as low as the high 30s. God help us all.)