There has to be circulation inside of a storm which if there is a tornado then it has that circulation. What makes it touchdown is when you have a strong updraft and downdraft which pushes that horizontal rotation into a vertical position which causes the funnel cloud to come in contact with the ground causing a tornado.
It is simply a tornado and even a tornado that is considered "weak" by tornado standards can produce a cloud of dust at ground level.
A tornado is considered a tornado when it reaches the ground
A tornado that doesn't touch the ground isn't a tornado; it is a funnel cloud. However if the funnel is pulling debris off the ground or making some other type of contact with the ground it is a tornado.
A tornado has actually touched down on the ground - a funnel cloud is a spinning cloud that has not actually touched the ground.
A tornado. a tornado
Yes. It is not officially counted as a tornado unless it touches the ground.
It is simply a tornado and even a tornado that is considered "weak" by tornado standards can produce a cloud of dust at ground level.
A tornado that touches the ground is simply a tornado. Before it touches down it is called a funnel cloud.
It is only when the circulation reaches the ground that it is considered a tornado. Prior to that it is merely a funnel cloud.
A tornado is considered a tornado when it reaches the ground
"A tornado hit the barn." would be a sentence.
No. A tornado starts in the clouds and extends towards the ground. Until it reaches the ground it is not a tornado but a funnel cloud.
This is the birth of a tornado.
A tornado that does not touch the ground is a funnel cloud.
A tornado becomes a tornado when the circulation reaches the ground.
Once it starts to develop a tornado may take any where from several minutes to a few seconds to reach the ground.
A tornado often appears dark were it is touching the ground be cause the powerful winds of the tornado lift dirt from the ground.