WMO codes for cloud types

Question 1

0

Answer 1

Low Clouds - none
Middle Clouds - none
High Clouds - none

Question 2

1

Answer 2

Low Clouds - Cumulus (fair weather)
Middle Clouds - Altostratus (thin)
High Clouds - Cirrus (filaments)

Question 3

2

Answer 3

Low Clouds - Cumulus (towering)
Middle Clouds - Altostratus (thick)
High Clouds - Cirrus (dense)

Question 4

3

Answer 4

Low Clouds - Cumulonimbus (no anvil)
Middle Clouds - Altocumulus (thin)
High Clouds - Cirrus (often with Cumulonimbus)

Question 5

4

Answer 5

Low Clouds - Stratocumulus (from Cumulus)
Middle Clouds - Altocumulus (patchy)
High Clouds - Cirrus (thickening)

Question 6

5

Answer 6

Low Clouds - Stratocumulus (not Cumulus)
Middle Clouds - Altocumulus (thickening)
High Clouds - Cirrus / Cirrostratus (low in sky)

Question 7

6

Answer 7

Low Clouds - Stratus or Fractostratus (fair)
Middle Clouds - Altocumulus (from Cumulus)
High Clouds - Cirrus / Cirrostratus (hi in sky)

Question 8

7

Answer 8

Low Clouds - Fractocumulus / Fractostratus (bad weather)
Middle Clouds - Altocumulus (with Altocumulus, Altostratus, Nimbostratus)
High Clouds - Cirrostratus (entire sky)

Question 9

8

Answer 9

Low Clouds - Cumulus and Stratocumulus
Middle Clouds - Altocumulus (with turrets)
High Clouds - Cirrostratus (partial)

Question 10

9

Answer 10

Low Clouds - Cumulonimbus (thunderstorm)
Middle Clouds - Altocumulus (chaotic)
High Clouds - Cirrocumulus or Cirrocumulus / Cirrus / Cirrostratus

Question 11

/

Answer 11

Low Clouds - not valid
Middle Clouds - above overcast
High Clouds - above overcast