How Do Tornadoes Form?

     It is proven that tornadoes form when thunderstorms create warm, wet, muggy air that collides with cold, crisp air from a cold front. When this happens large storms occur that contain large hail, high wind speeds, and on occasion tornadoes.
     During the spring, thunderstorms frequently develop along a "dryline," a dryline separates warm, moist air in the east from hot, dry air in the west. "Tornado thunderstorms" form as the dryline moves east and the two air systems come together.

     The twisting funnel of tornadoes is caused by the change in wind direction, an increase in wind speed, and the two air system rising higher and higher into the atmosphere. This combination of symptoms creates a horizontal spinning effect in the lower atmoshpere. The rising air pushes the horizontal funnel upwards making the funnel vertical. So when the total collisoin between the air systems finally occurs the funnel's rotation is increasing so much in speed that it becomes a full out tornado. 

  This tornado went from Wisconsin to Arkasas and killed two people in Missourri...