Sometime in the 1980s I read a series that took place in the States just before the bombs fall, and then continues as these youths (I think it's two guys and a girl) start exploring what is left of their world. Two of them are brother and sister.
They encounter mutated animals of various sorts, plus different survivors. The storyline seems similar to "Children of Dust" but, there is no family in the shelter with them.
I think there were 3 books in the series and the series title had something to do with nuclear fallout.
The main character was a girl. When they first come up from the shelter, they are attacked by mutated dogs. She uses a bow and arrow? or a rifle from the shelter?
Its killing me trying to remember the title... please help :)