Tornadic Thunderstorms
Some thunderstorms produce tornadoes. Although scientist are not sure what causes some storms to produce tornadoes, while others do not, there are some strong indicators that a tornado will form.
Wall Cloud - The first indication that a thunderstorm may produce a tornado. The lowered rotating cloud located at the base of the storm is called the wall cloud. There is little to no rain associated with this cloud.
Funnel cloud - Usually, within the wall cloud, a smaller rotating cloud, made of condensed water droplets, will appear without making contact with the ground. This is called the funnel cloud. If the funnel cloud reaches the ground, it then becomes a tornado.
Hook Echo - Is a hook like shape in the weather radar that is an indication there is an area of rotation within the storm, possibly a tornado. It is caused by rain, hail and debris being wrapped around the supercell.
