Cloud Types

1. Cirrus
2. Cirrostratus
3. Altocumulus
4. Altostratus
5. Nimbostratus
6. Stratocumulus
7. Fair weather cumulus
8. Cumulonimbus
9. Contrails
10. Billow clouds
11. Mammatus
12. Orographic
13. Pileus clouds

Source: http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/cld/cldtyp/home.rxml