I don't see any leaks. Could the cold weather do this?

 

nope.definately not normal.check all ur hoses,and radiator for leaks.there is a coolant hose going from the back of the block up to the tb,partially behind the intake manifold thats pretty hard to see[i think it gets neglected a bit,since it is hard to get to],so,could be that or any one'of em.try a pressure test to help u find leaks.also,check ur water pump.if it looks like water's been leaking out of the weep holles,it might be shot...dont forget the to check the reservoir itself and the overflow hose going to it.if no external leaks,you could have a intenal leak...that would suck .good luck.
david

 

also check the radiator cap!!!!!!!1 that was my mistake check that first.