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Sky Watching
- Introduction
- Main Types of Clouds

 

Sky Watching~

Sky Watching~

Sky Watching is one of the ways of weather forecasting. Through determining the type of cloud, we can predict the wind speed, wind direction, and also if it is going to rain!

Main Types of Clouds

Main Types of Clouds

The main types of clouds are recognized by their shape and height. There are three main cloud types called cirrus, cumulus and stratus. There are many combinations of these clouds and different types may exist in the sky at the same time.

Many different cloud patterns are formed from combinations of the main cloud types. Their names refer to the types of clouds or the height at which they are found. For instance, the word "alto" in a cloud type indicates that the clouds are middle level clouds, found between 2000 m and 6000 m. Stratus means layered, and nimbus indicates rain or snow is falling from the cloud. >> A diagram shows the height of clouds.

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The following is the 3 major types of clouds.

- Cirrus clouds are high level clouds, usually found above 6000 m. They are made up of ice crystals and have a feathery wispy appearance.

- Cumulus clouds are found at different heights. They are individual, rounded clouds with fairly flat bases. They are often seen on dry, sunny days.

- Stratus clouds form a layer or sheet across the sky. They are found at low levels, below 500 m and often produce light rain and drizzle.

 

Amazing but True
The tallest cloud is the giant cumulonimbus. It can reach a height of 18km which is twice as high as Mount Everest and can hold more than 1/2 million tonnes of water!

 

Here are the types of clouds, which can be found in the previous diagrams.

Cumulonimbus clouds They are like massive cumulus clouds. They have flat tops and may extend to great heights. They are associated with heavy rain and thunder.
Cirrostratus clouds They are cirrus clouds, which form a thin almost transparent , layer over the whole sky. They often bring rain.
Cirrocumulus clouds They are a combination of cirrus and cumulus clouds. They are individual clouds of ice which are sometimes arranged in rows.
Altocumulus clouds They are small gray or white cumulus clouds of roughly the same size, often lying in rows and sometimes joined together.
Altostratus clouds They normally form a gray sheet of cloud across the sky. Sunlight can usually be seen filtering through this.
Stratocumulus clouds They form a sheet of rounded cumulus clouds, which are almost joined together.
Nimbostratus clouds They are a thick layer of gray clouds with an uneven base, which blot out the Sun completely.
Stratocumulus clouds They form a sheet of rounded cumulus clouds which are almost joined together.

 

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