Here are the stages of thunderstorm development numbered in the correct order:
1. ________ 15. Warm, moist air rises quickly, and the moisture condenses into a visible cloud. Then updrafts form.
2. ________ 14. Equal amounts of updrafts and downwards from convection cells.
3. ________ 19. The updrafts slow as downdrafts decrease the supply of warm, moist surface air.
4. ________ 16. Falling precipitation cools the air around it, forming downdrafts.
5. ________ 17. Precipitation begins to fall.
6. ________ 18. The updrafts cease and precipitation stops.