1. 4 3 . 2
Clouds

2. CLOUDS Cumulus Stratus
form in rising air currents and indicate unstable air
Stratus
form in horizontal layers and indicate stable air

3. Families: Height of Bases:
LOW (STRATO) surface ,500ft
MIDDLE (ALTO) 6,500ft ,000ft
HIGH (CIRRO) 16,500ft - 45,000ft
VERTICAL 1,500ft - above DEVELOPMENT

4. HIGH CLOUDS

5. CIRRUS (CI)
Thin delicate wisps

6. CIRRO-CUMULUS (CC)
Thin cottonball like

7. CIRRO-STRATUS (CS) Thin high sheet Produces “Halo” effect
Often indicates the approach of a warm front

8. MIDDLE CLOUDS

9. ALTOCUMULUS (AC)
Layers of rounded masses of cloud

10. ALTOSTRATUS (AS) Thick grey clouds that often cover the entire sky
May give some light rain or snow

11. ALTOCUMULUS CASTELLANUS (ACC)
Altocumulus with turrets

12. NOTE: You must use the buttons in the Confirmation Stage

13. Meteorology Clouds Let's try a few review questions on Meteorology:
Question #1 - What is the height of middle clouds? A
1, feet B
6,500-23,000 feet C
16,500-45,000 feet D
23,000-45,000 feet

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18. Meteorology Clouds Let's try a few review questions on Meteorology:
Question #2 - What type of cloud produces a halo effect? A
Altostratus B
Altocumulus Castellanus C
Cirrostratus D
Cirrocumulus

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23. LOW CLOUDS

24. STRATUS (ST) A uniform layer, like fog, but not resting on the ground
Drizzle often falls from stratus

25. STRATUS FRACTUS (SF)
Pieces of Stratus

26. STRATOCUMULUS (SC)
A thin layer of rounded masses of cloud

27. NIMBOSTRATUS (NS)
A low layer of uniform, dark grey cloud

28. CLOUDS OF
VERTICAL DEVELOPMENT

29. CUMULUS (CU)
Thick
Rounded and lumpy
Resemble cotton balls

30. Cumulus Fractus (CF)
Broken Cumulus

31. TOWERING CUMULUS (TCU)
Cumulus that builds up into high towering masses
Rough air underneath
Heavy icing in cloud

32. CUMULONIMBUS (CB) Heavy masses of cumulus Anvil top
Violent vertical currents
CB clouds should be avoided by all aircraft

33. Clouds of Vertical Development
bases as low as 1,500 feet
composed of:
water droplets
supercooled water droplets
ice crystals.

34. NOTE: You must use the buttons in the Confirmation Stage

35. Meteorology Clouds Let's try a few review questions on Meteorology:
Question #3 - What are clouds of vertical development composed of? A
Water droplets B
Ice crystals C
Supercooled water droplets D
All the above

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40. Meteorology Clouds Let's try a few review questions on Meteorology:
Question #4 - What cloud is thick gray and often covers the entire sky? A
Altostratus B
Cirrus C
Altocumulus D
Cirrostratus

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45. Meteorology Clouds Congratulations!!
You have now completed the Clouds lesson of the Meteorology Module. Of course, this lesson is always available to you for future reference if required.
You are now ready to move along to the next Meteorology lesson you have not completed or to any other module you wish. You can advance to the Self Test Module if you feel ready to challenge the final exam.
Good Luck!