What causes a tornado to touch the ground?

Related questions

1. What months are tornado season?
2. What causes thunder?
3. Why is thunder so loud?
4. What is a snow shower?
5. What happens right before a tornado?
6. Do squall lines produce tornadoes?
7. What is the difference between a blizzard and a snow squall?
8. What is tornado season?
9. What does snow squall warning mean?
10. What state is Tornado Alley in?

Tags

1. #rotating
2. #thunderstorm
3. #water
4. #speed
5. #rotation
6. #continues
7. #ground
8. #droplets
9. #moving
10. #mesocycle
11. #funnel
12. #moist
13. #touches
14. #eventually
15. #called
16. #cloud
17. #updraft
18. #becomes
19. #draws
20. #mesocyclone
21. #tornado
22. #increases
23. #descends