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Scientists understand that tornadoes are a type of small but violent windstorm with both intense rotating winds and very strong updrafts.

Tornadoes form from strong thunderstorms, but scientists only partially understand the exact mechanisms of their formation. (see below links for more information).

Scientists know that tornadoes vary in strength, size, forward speed and duration. Although stronger tornadoes tend to be larger and longer lasting, this is not always the case. These tornadoes can cause anything from minor damage to total destruction.

Tornadoes usually follow a straight path, but can make turns while others have followed meandering paths.

Tornadoes often occur in outbreaks, where multiple tornadoes form from one storm system within a day or two. The strongest of tornadoes often occur in such outbreaks.

Some tornadoes break down to produce multiple suction vortices, which produce narrow, curved swaths of damage that is more severe than that from the rest of the tornado. The are call multiple vortex or multivortex tornadoes. Many of the strongest tornadoes are multivortex.

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Q: What do scientist understand about tornadoes so far?
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