Answer:
Step-by-step explanation:
For a tornado to form, a cold, dry air mass must meet a warm, moist air mass and these air masses must be moving in opposite directions.
The warm, moist air mass originates in tropical or subtropical regions and is characterized by high temperatures and relative humidity. This air mass moves northward or eastward, and is known as a tropical air mass or warm air mass.
On the other hand, the cold and dry air mass originates in mid-latitude or high latitude regions and is characterized by low temperatures and relative humidity. This air mass moves southward or westward, and is known as a polar air mass or cold air mass.
When these two air masses meet, a large amount of potential energy is generated which can be released in the form of strong winds, heavy rainfall and, in extreme cases, tornadoes.