Tornadoes come down to the ground by a lowering wall cloud. It is basically a wall of dark clouds descending. If the conditions are right, it can tighten up to become a tornado.
Techincally, 100%. If it does not touch the ground it is not considered a tornado. The number of potential tornadoes that do not touch down is not known, as these weaker circulations are often difficult to detect.
A tornado that touches the ground is simply a tornado. Before it touches down it is called a funnel cloud.
They don't. By definition, a tornado must be in contact with the ground.
That is the model agreed upon by most scientists. There is some evidence, though, that some tornadoes may form from the ground up. Scientists are still unsure what to make of this.
Tornadoes have been recorded as narrow as 3 feet.
not tornadoes do not have names they only get named by the place where they touch down
On average 3 tornadoes touch down in Maryland each year.
No. Tornadoes come from thunderstorms, which form in the air. The tornado itself starts forming several thousand feet above the ground.
About 1,000 on average.
Tornadoes can sometimes scour the ground, but this is rare, ocurring only in the most violent tornadoes.
Techincally, 100%. If it does not touch the ground it is not considered a tornado. The number of potential tornadoes that do not touch down is not known, as these weaker circulations are often difficult to detect.
A tornado that touches the ground is simply a tornado. Before it touches down it is called a funnel cloud.
none but tornadoes only can produced other tornadoes after a tornado touches down None, tornadoes can not cause another natural disaster but it is possible that once a tornado touches the ground that it may spawn other tornadoes.
Tornadoes form from the sky.
A funnel cloud is typically visible before a tornado touches down
Yes, tornadoes do touch the ground. If the don't they are not considered tornadoes. However, in order to qualify the visible funnel does not have to reach ground winds, just the vortex of wind.
In a sense. Some tornadoes are only in intermittent contact with the ground, touching down and lifting multiple times.