1. cold fronts (shown in blue)

3. Cumulus clouds

4. cumulus and cumulonimbus clouds

5. vertical development clouds are common to cold fronts

6. 1. base of a cumulonimbus cloud

7. 2. circulation in cumulonimubus cloud

8. Cumulonimbus cloud and descending wall cloud

9. Mammary clouds-rotating air

10. small hail

11. hail stones

12. hail ball

13. 6 inch hail ball

14. hail storm

15. Large hail of various sizes.

16. hail damaged car

17. circular hail

18. skylight broken by hail

19. hail covered road

20. Large hail compared to a chicken egg.

21. golf ball size hail

22. Windshield broken by hail

23. Hail is common to cumulonimbus clouds.

24. hail damage

25. hail damaged cars

26. tile roof damaged by hail

27. hail storm

28. hail covered highway

29. approaching cold front (cumulonimbus cloud)

30. Approaching cold front and cumulonimbus cloud.

31. 3. wall cloud forms

32. 4.funnel of the tornado

33. 5.tornado is on the ground

34. tornado

35. Tornado damage to houses north of Madison, Wisconsin

36. F3 Tornado Damage (winds in excess of 206 m.p.h.)

37. Tornado damage in Iowa

38. Only the basement remains from an F4 tornado

39. Tornado damage in Georgia

40. EF4 tornado destroyed appartment

41. tornado

42. House destroyed by a tornado.

43. tornado on the ground with debris

44. tornado on the ground

45. Tornado on the ground.

46. cloud to cloud lightning

47. cloud to ground lightning

48. cloud to cloud lightning

49. Cloud to ground lightning

50. cloud to ground lightning

51. Night time tornado shown by lightning