We owe a lot of this from a cold front that came in from Alaska (never a phrase you like to hear) that seems to have sat itself down and decided to do some kicking back in the area. The good thing is it's not as cold as cold can be-- the record for SF is 36 which was in 1924.
Temperatures are supposed to climb to the 50s today but drop again this night. Wednesday, however, is looking really, really bad and it's supposed to rain on Thursday.
Yay.