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It is currently 19 Jun 2018, 14:35

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Cloud classification
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Stratus cloud
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Stratocumulus cloud
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Cumulus cloud
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Nimbostratus cloud
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Cumulonimbus cloud
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Altostratus cloud
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Altocumulus cloud
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Cirrus cloud
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Cirrostratus cloud
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Cirrocumulus cloud

Stratus cloud

Stratocumulus cloud

Stratus cloud

Name:Stratus (St)
Height range:ground level to 6,500 feet
Composition:water droplets
Turbulence:nil
Icing:occasionally light to moderate
Visibility:moderate to poor (10 to 30 metres)
Significance:warm sector, risen fog, light precipitation
Stratocumulus cloud

Name:Stratocumulus (Sc)
Height range:ground level to 6,500 feet
Composition:water droplets
Turbulence:light to moderate
Icing:light to moderate
Visibility:moderate to poor (10 to 30 metres)
Significance:turbulence cloud, often associated with cumulus cloud

Cumulus cloud

Nimbostratus cloud

Cumulus cloud

Name:Cumulus (Cu)
Height range:ground level to 25,000 feet
Composition:water droplets and ice crystals
Turbulence:moderate to severe
Icing:moderate to severe
Visibility:poor (less than 20 metres, occasionally less than 10 metres)
Significance:instability cloud, cold front; large cumulus may develop into cumulonimbus
Nimbostratus cloud

Name:Nimbostratus (Ns)
Height range:ground level to 15,000 feet
Composition:mainly water droplets, but ice crystals at medium levels
Turbulence:moderate to severe
Icing:moderate to severe
Visibility:poor (10 to 20 metres)
Significance:warm front adjacent

Cumulonimbus cloud

Altostratus cloud

Cumulonimbus cloud

Name:Cumulonimbus (Cb)
Height range:ground level to 45,000 feet
Composition:water droplets and ice crystals
Turbulence:moderate to severe, occasionally very severe
Icing:moderate to severe
Visibility:poor (less than 20 metres, occasionally less than 10 metres)
Significance:instability cloud, thunderstorms, lightning, hail
Altostratus cloud

Name:Altostratus (As)
Height range:6,500 to 23,000 feet
Composition:water droplets and ice crystals
Turbulence:light to moderate
Icing:light to moderate
Visibility:fair (20 to 1,000 metres)
Significance:200 nautical miles ahead of a warm front, often merges into nimbostratus behind and below

Altocumulus cloud

Cirrus cloud

Altocumulus cloud

Name:Altocumulus (Ac)
Height range:6,500 to 23,000 feet
Composition:water droplets and ice crystals
Turbulence:light to moderate
Icing:light to moderate
Visibility:fair (20 to 1,000 metres)
Significance:sometimes indicates the approach of a warm front
Cirrus cloud

Name:Cirrus (Ci)
Height range:16,000 to 45,000 feet
Composition:ice crystals
Turbulence:nil
Icing:nil
Visibility:quite good (1,000 metres and more)
Significance:400 to 600 nautical miles ahead of a warm front

Cirrostratus cloud

Cirrocumulus cloud

Cirrostratus cloud

Name:Cirrostratus (Cs)
Height range:16,000 to 45,000 feet
Composition:ice crystals
Turbulence:nil
Icing:nil
Visibility:quite good (1,000 metres and more)
Significance:300 to 500 nautical miles ahead of a warm front
Cirrocumulus cloud

Name:Cirrocumulus (Cc)
Height range:16,000 to 45,000 feet
Composition:ice crystals
Turbulence:nil
Icing:nil
Visibility:quite good (1,000 metres and more)
Significance:300 to 500 nautical miles ahead of a warm front

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