Do not open windows that only allows wind water and debris to enter. The goal is to find protection from flying debris. Twisters in mountains are not as common as in the Plains, however a mountain does not stop every tornado. While conditions are not favorable for tornadoes in mountains, they do happen. In the 1974 Super Outbreak, several tornadoes climbed up, over and down Appalachian mountain peaks over 3,000'.
Severe thunderstorms moving along the valley are capable of producing tornadoes as well.
Over 200 people died, however, an infant named Elvis Aaron Presley survived the monster twister. This indicates strong straight line winds, possibly from a downburst or microburst. Tornadic wind damage is never straight because the wind moves counter-clockwise. Funnel clouds typically are above the surface. If you see a debris field beneath a funnel, this indicates it is touching the ground or is just above the surface.