Question

What are some other factors for tornadoes to form? ...
What are the wind speeds in a tornado? ...
How many tornadoes occur in the U.S. each year? .

Answer 1

Answer:

• Tornadoes form when warm, humid air collides with cold, dry air. The denser cold air is pushed over the warm air, usually producing thunderstorm's.

• The Fujita Scale
• The Fujita Scale of Tornado Intensity

F-Scale Number Intensity Phrase Wind Speed

F1 Moderate tornado 73-112 mphF2 Significant tornado 113-157 mphF3 Severe tornado 158-206

mph

• 1000. tornadoes