2. Cirrus Clouds : feathery, light, usually composed of Ice crystals High altitude where it is usually very dry and cold

3. Stratus Clouds Are thin-layered clouds Are low to the earth’s surface Look like stripes or streaks in the sky Look like a layer of fog that never reaches the ground

4. Cumulus Form as water vapor condenses in strong, upward air currents above the earth's surface These clouds usually have flat bases and lumpy tops Usually very isolated with large areas of blue sky in between the clouds Most cumulus clouds form below 6,000 feet and are relatively thin and associated with fair weather

5. Cumulonimbus Clouds Cumulonimbus clouds are much larger and more vertically developed than fair weather cumulus They can exist as individual towers or form a line of towers called a squall line. Fueled by vigorous convective updrafts (sometimes in excess 50 knots), the tops of cumulonimbus clouds can easily reach 39,000 feet (12,000 meters) or higher.

6. High-Level Clouds Cloud types include: cirus and cirrostratus. Mid-Level Clouds Cloud types include: altocumulus, altostratus. Low-Level Clouds Cloud types include: nimbostratus and stratocumulus. Clouds with Vertical Development Cloud types include: fair weather cumulus and cumulonimbus. Other Cloud Types Cloud types include: contrails, billow clouds, mammatus, orographic and pileus clouds.

7. High-Level Clouds Cloud types include: cirus and cirrostratus.

8. Mid-Level Clouds Cloud types include: altocumulus, altostratus

9. Low-Level Clouds Cloud types include: nimbostratus and stratocumulus

10. Clouds with Vertical Development Cloud types include: fair weather cumulus and cumulonimbus

11. Other Cloud Types Cloud types include: contrails, billow clouds, mammatus, orographic and pileus clouds.

14. Alto Stratus Fair Weather Cumulus Cumulonimbus Stratus: Fog

15. Alto Cumulus with a lenticular cloud

16. Lenticular Clouds: always associated with rising air above mountains.

17. Cirrocumulus

18. Cirrus

19. Cumulonimbus

21. Stratus