From mike nicco. This morning temperatures, a lot of us below freezing. Palo alto, 29 along with concord. 26 in napa. 27 in santa rosa. Almost freezing in san rafael. In oakland, 32 degrees this morning. Winds are light. That was one of the key ingredients. Also the dry air. Just look how nasty the air looks over the north bay thats where we have our worst air quality now. Thats one of the reasons why were under a spare the air alert today. Well also if you look at the forecast for tomorrow be under one and also as we head towards sunday. It isnt often that we get below freezing temperatures in the bay area. People are bundling up and doing their best to stay warm without adding to air pollution worries. Amy hollyfield has more. Looking at this gorgeous view this is what theyre trying to protect. This air. They say it has to be a spare the air day today. They cant have you lighting fires because the soot just makes it difficult to breathe. Today is cold and dry, and it is a spare the a