1. Monday, April 12 th 1.Weather Journal 2.Cloud Types 3.Sky Photos

2. Quick Review… Saturday and Sunday were sunny and the temps started cool on Saturday and slowly warmed over the weekend. This Common in areas of : High Pressure/Low Pressure HIGH PRESSURE

3. Quick Review… This morning started off warm and cloudy with a chance of showers later in the day. Today we will experience: Higher Pressure/Lower Pressure LOWER PRESSURE

4. Weather Journals Please write down the dates of : Saturday (4/10) Sunday (4/11) and Today (4/12)

5. Three Main Cloud groups Cumulus Stratus Cirrus

6. Cumulus – A Low Cloud

7. Cumulus

8. Cumulus Clouds Grow Upward!

9. These are called “Towering Cumulus” or “Cumulocongestus”

10. Finally…They are Thunderstorm Clouds!

11. Officially called “Cumulonimbus” Clouds

12. If they grow large enough….They become Severe Thunderstorms. There are some specific clouds associated with Severe Thunderstorms. They are….

13. Mammatus Clouds

14. Mammatus are pouches hanging from the bottom of a cloud

15. Sometimes a “Wall Cloud” will form

16. This is a part of the cloud that lowers really close to the ground

17. 90% of all tornadoes form from Wall Clouds

18. The other type of low cloud is a “Stratus” Cloud

19. These are layer or blanket clouds

20. They are the clouds on gray, dreary days

21. Stratus are most common in winter

22. If a stratus cloud forms on the ground….

23. It is called “Fog”

24. If a stratus cloud Rains….

25. It’s called a “Nimbostratus”

26. The next level of clouds are “Mid-Level” Clouds “Alto” is a word meaning middle

27. “Altocumulus” are cumulus clouds higher in the atmosphere

28. Many times they look like popcorn

29. “Altostratus” look very much like regular Stratus clouds

30. But they are sometimes thinner and not complete across the sky

31. The highest clouds in the sky are Cirrus Clouds. They form so high up that all the water in them has frozen to ice

32. Cirrus Clouds are very white in color…..

33. …and wispy in shape

34. Some Other Odd forms of clouds include…

35. Contrails

36. Formed from the exhaust of Jets

37. Lenticular

38. Which are cumulus clouds smoothed out by strong winds

39. Many times they are reported as UFO’s

40. “Pileus” clouds form on the top of mountains

41. They often look like caps over the mountain top

42. “Noctilucent” clouds glow in the dark

43. They are very rare and few good pictures of them exist

44. The last type of very rare cloud is a “Nacreus” cloud

45. “Nacreus” clouds shine like the inside of a clam shell

46. Now… Try to name these clouds

47. Cumulus

48. Altocumulus

49. Cumulonimbus

50. Lenticular

51. Stratus

52. Cirrus

53. Cirrus (again)

54. Mammatus

55. Wall Cloud

56. That’s All Now…Please take out your sky photos and try to identify the clouds you see.