Cloud Cover And Precipitation Notes
- Cirrus – Curl
- Stratus – Layer
- Cumulus – Heaped
- Alto – High
- Nimbus – Rain bearing
Low-level clouds (based 0 – 2 km high)
- Stratus – Extensive, featureless, shallow could sheet, can yield drizzle or light rain.
- Stratocumulus – Shallow cloud sheet, broken into roughly recurring masses of cumulus, may drizzle or snow
- Cumulus – Seperate, hill-shaped pufffy clouds, with level bases. Usually fair, but may bring showers after a cold front.
- Cumulonimbus – Very large, high (up to 10km) cumulus, with dark bases and anvil shaped top, Can bring thunder, lightning, squalls and heavy rain.
Medium-level clouds (base 2 – 4 km high)
- Altocumulus – Shallow cloud sheet with roughly regular patches or ripples of small rounded clouds. Usually fair weather.
- Altostratus – Featureless, thin translucent cloud sheet. Usually fair weather.
- Nimbus – Extensive, very dark cloud sheet, usually yielding precipitation
High Clouds (base 5 -15 km high)
- Cirrus – Steaky, white, feather-like cloud, indicates an approaching depression
- Cirrocumulus – Shallow, more or less regular patches or ripples of cloud. fair weather.
- Cirrostratus – Shallow sheet of largely translucent cloud fair weather.