Storms are classified as tornadoes when winds are from 40 mph to 72 mph. These tornadoes cause light damage, chimney damage, and broken tree branches.
How tornadoes stop is not fully understood, though it has more do do with the mechanics of the storm that produces the tornado rather than what surface with form on. The best explanation so far is that cold air from the rainy portion of either the tornado's parent storm or a nearby storm undercuts the updraft that sustains the tornado. This chokes of the supply of warm air that feeds the storm tot he point that it can no longer support a tornado.
The center of a tornado is an area of intense low pressure.
The Fujita scale actually classifies tornadoes based on the amount of damage they do to buildings and plants. If a small tornado with extremely high winds and a small footprint takes out a farmhouse and a corn field, it's bad. But if a tornado that has winds not as high as that small one but has a footprint a quarter mile across sweeps through a town and shreds it, that's much worse. The former tornado will have a rating lower on the Fujita scale than the latter one will. Note that the damage assessment and the application of a Fujita scale rating will come after the tornado has passed.
It is not fully understood how tornadoes dissipate. Most often, it is believed that cold or dry air enters the updraft of the tornado's parent storm, cutting off the supply of energy that powers both the storm and the tornado. Sometimes the storm loses energy as the heat of the day dissipates with the setting sun, or as the system supporting it retreats. The storm may also lose the rotation it needs to produce a tornado, such as by merging with a squall line.
Tornadoes are caused by the rotation of supercell thunderstorms within a specific atmospheric environment. The combination of wind shear, instability, moisture, and a triggering mechanism such as a cold front or dryline sets the conditions for tornado formation. The rotation within the storm can intensify into a tornado when it reaches the ground.
A tornado warned storm is a thunderstorm for which a tornado warning has been issued, meaning that the storm is producing rotation that can spawn a tornado.
A tornado comes from a type of storm called a rotating thunderstorm, but is not a storm, itself.
A tornado does not "mix" with other storms. A tornado is part of a larger parent storm, though.
A storm can't turn into a tornado, it a thunderstorm can produce one.
74 mph or more
A tornado warned storm is a thunderstorm for which a tornado warning has been issued, indicating that it is capable of producing a tornado. A tornado threat is a general term that refers to the danger tornadoes may pose to an area during a particular storm.
Tornado.
When a storm spawns a tornado it produce a tornado.
storm chasers chase the tornado
There is nothing you can do to storm a tornado.
a giant tornado kills everyone except the storm thief who steals the tornado
The Waco tornado of 1953 was an F5.