NEW : Cars trapped on highway in Texas for more than nine hours . Fire crews in Oklahoma get stuck on their way to fire call . Whiteout conditions prevent plows from Texas highways . And later , it followed that up with another indication of how bad things were getting . Amarillo , Texas gets six inches of snow in one day .
NEW : Cars trapped on highway in Texas for more than nine hours . Fire crews in Oklahoma get stuck on their way to fire call . Whiteout conditions prevent plows from Texas highways . Amarillo , Texas gets six inches of snow in one day .