what causes a tornado when warm southern air tries to rise and northern air block them as this happens the airs hit each other causing the warm air to twist around horizontally which makes a funnel its not a tornado until it touches the ground
a wall cloud is a huge cloud that is at the base of a storm that has a swivel to it a funnel cloud extends from a wall cloud it rotates but its not a tornado until in touches ground
the worst tornado in the us was the tri state tornado it went through three states Indiana Missouri Illinois there was over 1.4 billion dollars worth of damage it killed 695 people and injured 2027 and destroyed 15000 homes