Dreams can be affected by emotional states and tend to be metaphors for those emotions. Tornadoes in dreams generally indicate stress, feeling overwhelmed or destructive behavior, notes DreamDictionaryNow.
Tornado dreams may occur when there are disappointments in waking life or if someone in a person's life is prone to emotional outbursts. Someone in a violent relationship or a child hearing his parents fight often may have dreams involving tornadoes.
Not all tornado dreams have a negative connotation. Tornadoes sweep everything out of their paths and symbolically represent a fresh start. Tornado dreams may occur after beginning a new job, moving to a new house or entering a new relationship.