All About Clouds

All About Clouds


Clouds look fluffy and light, but inside them is a mass of tiny water droplets or ice crystals suspended in the atmosphere, that could weigh more than an airplane.

Clouds are an important part of Earth’s weather and climate. Rain, snow, sleet and hail falling from clouds is called precipitation.


Clouds are formed when the heat of the Sun pulls water vapor up from the ground into the sky. When the warm air rises, it cools, then the water vapor turns into tiny droplets of water or ice. As more and more air cools down, more droplets form, and will eventually turn into a cloud.

Always remember, clouds only form when warm air cools, and it is this warm air that helps to keep the clouds floating. There are many different types of clouds, the most common ones we see are called stratus, cumulus and cirrus.


Types of clouds


Stratus clouds are composed of thin layers of clouds covering a large area of the sky. These clouds are very common all over the world, and would only produce light showers of rain, or even light snow if temperatures fall below freezing.


Cumulus clouds are puffy, like cauliflower floating in the sky and can be white or grey in color. They are found on calm clear days and would indicate fair weather, but can grow into thunderstorm clouds giving the right conditions.

(3) CIRRUS –

Cirrus are the highest level clouds. They are composed of ice, as the higher you go up the colder the conditions. They are usually white and predict fair to pleasant weather. They normally indicate that a change in the weather will occur in the next 24 hours.


The other name of cloud types are Stratocumulus, Altostratus, Altocumulus, Cirrocumulus, Cirrostratus, Nimbostratus and Cumulonimbus. A cloud that forms on the ground is called Fog. Most clouds form in the troposphere, which is the lowest part of the Earth’s atmosphere. Some form as high as the stratosphere or mesosphere.


When it is very cold outside, your breath can make a mini-cloud.

Cumulonimbus clouds are thunderstorm clouds.

Some of the clouds you see in the sky could be from airplanes. These are called contrails.

Clouds can contain millions of tons of water.

Grey clouds

Clouds are white because they reflect light from the Sun, where as grey clouds are full of water, so they don’t.

Clouds moving across the sky are being blown around by the wind.

Although clouds are all different shapes and at different heights, they all form the same way.

Clouds that are being moved by the jet stream, which is a strong wind that blows across the Earth, are moving at a speed of about 100 miles per hour.

Storm clouds move at a speed of about 30-40 miles per hour.

Dust and chemicals can also travel up into the atmosphere and get entangled in a cloud, so it is more than just water that is falling down on us on a wet day.

If you see a green cloud, no doubt a severe thunderstorm/tornado is approaching.

Sometimes clouds appear to be brilliant colors at sunrise and sunset. This is down to dust particles in the air.

Clouds help to retain heat, so it doesn’t escape quickly into space.

All planets and moons with an atmosphere have clouds, but not all are made of water, for example, Jupiter and Saturn’s clouds are made of ammonia.