There are different types of clouds in the sky depending on the weather conditions at that moment. These types of clouds can reveal certain information about the weather. One of the best known, known for its storm clouds, is the cumulonimbus cloud . These are clouds with vertical development that are responsible for rain.
In this article we are going to tell you what the different characteristics of cumulonimbus clouds are, how they originate and what their consequences are.
What are cumulonimbus clouds
It is a dense and powerful cloud of considerable vertical dimension, shaped like a mountain or a large tower. At least part of its upper region is generally smooth, fibrous, or striped, and is almost always flat . This part often extends in the shape of an anvil or a broad plume.
Cumulonimbus clouds are thick water clouds with considerable vertical expansion and development. They exhibit large-looking structures with tips that are often mushroom-shaped. They can grow to such a height that the upper layer of ice can form.
Their lower portion is usually less than 2 kilometers above the ground, while the upper portion can reach a height of 10 to 20 kilometers . These clouds often produce heavy rain and thunderstorms, especially when fully developed. Their formation requires the simultaneous existence of three factors:
- The ambient humidity is high.
- Unstable hot air mass.
- An energy source that quickly lifts that hot, wet substance.
Characteristics of cumulonimbus clouds
They belong to the lower stratum, but their vertical development is so great that most of the time they completely cover the middle stratum and reach the upper stratum.
They are composed of water droplets and primarily ice crystals in their upper regions . They also contain larger water droplets, usually snowflakes, ice particles, or hail. Often, their vertical and horizontal dimensions are so large that their characteristic shape is only visible from a great distance.
The essential difference between cumulonimbus and other clouds:
Between Cumulonimbus Clouds and Nimbuses: When cumulonimbus clouds cover most of the sky, they can easily be mistaken for Nimbuses. In this case, if the rain is of the shower type or is accompanied by lightning, thunder or hail, the observed cloud is cumulonimbus.
Between cumulonimbus and cumulus clouds: whenever at least part of the upper region of a cloud loses its clear outline , it should be identified as a cumulonimbus. If it is accompanied by lightning, thunder, and hail, it is also a cumulonimbus.
They are usually formed by large, well-developed cumulus clouds (Cumulus congestus) whose transformation and growth process continues. Sometimes, they can develop from altocumulus or stratocumulus clouds, which contain small, imposing protuberances in their upper parts . They can also originate from the transformation and development of a portion of the altostratus or nimbus layer.
Meteorological significance of cumulonimbus clouds
This is a typical storm cloud. In winter it is associated with the passage of a cold front, while in summer it is the result of several factors: heat, humidity, and strong convection, which cause water vapor to rise to the upper layers of the atmosphere where it cools and condenses due to the low temperatures.
Rain, hail, snow, and even sleet are expected. Other accompanying phenomena include strong gusts of wind and even tornadoes when convection is very strong. Fortunately, with current technology and the help of weather radars, such clouds can be quickly detected, and civil safety and aviation equipment can be deployed from there.
How a cloud forms
If there are clouds in the sky, there must be air cooling. The "cycle" begins with the sun. As the sun's rays heat the Earth's surface, they also heat the surrounding air. Warm air becomes less dense, so it tends to rise and be replaced by cooler, denser air. As altitude increases, environmental thermal gradients cause temperatures to decrease. Therefore, the air cools.
When it reaches the colder air layer, it condenses into water vapor. This water vapor is invisible to the naked eye because it is made up of water droplets and ice particles. The particles are so small that they can be held in the air by a slight vertical airflow.
The difference between the formation of different types of clouds is due to the condensation temperatures. Some clouds form at higher temperatures and others at lower temperatures. The lower the temperature of the formation, the "thicker" the cloud will be. There are also some types of clouds that produce precipitation, while others do not.
If the temperature is too low, the cloud that forms will consist of ice crystals.
Another factor that affects cloud formation is air movement. Clouds, which are created when the air is still, tend to appear in layers or formations. On the other hand, those with strong vertical currents formed between the wind or the air present a great vertical development. In general, the latter is the cause of rains and storms.
Other vertical development clouds
cumulus humilis
They have a denser appearance and very pronounced shadows, to the point of blocking out the sun. They are gray clouds . Their base is horizontal, but their upper part has large protrusions. Cumulus clouds are associated with fair weather when there is low humidity and little vertical air movement. They are capable of producing downpours and thunderstorms.
cumulus congestus
It's a more developed cumulus humilis cloud that begins to look much more shadowy, almost completely blocking the sun. The underside often turns a dark gray color due to its density . These are the clouds that produce rain of normal intensity.
I hope that with this information you can learn more about cumulonimbus clouds and their characteristics.
