Rain is the most common type of atmospheric precipitation, which consists of small water droplets (from 0.5 to 7 mm). This atmospheric phenomenon is one of the stages of the water cycle on planet Earth. Let’s take a closer look at what rain is, its signs, types and other features.More interesting information about rain and its signs can be found at the link https://signs-en.com/.

The main signs of approaching rain

There are a number of signs that, based on observation, suggest that rain is likely to fall soon. These signs include:

• Dark clouds in the sky at a relatively low altitude.
• The sky is covered with dark, layered rain clouds; the closer the rain is, the lower the clouds usually are.
• The wind picks up and may change direction.
• The air becomes more humid.
• There is a smell of dampness in the air.
• There is no dew in the morning.
• The appearance of haze or fog.
• Birds fly at low altitudes, insects begin to hide.
• Bees stop flying out of their hives, and ants close the passages in their anthills.

All of the above signs may indicate that rain is approaching. However, they do not guarantee that it will definitely rain. In some cases, the presence of a large number of such signs does not lead to rain, but this does not happen often.

Classification of rain

Rain is usually divided into the following types:

• Normal rain. The intensity of precipitation is average, and such rain can last from a few minutes to several hours. In most cases, this type of rain can be observed in late spring and summer.
• Downpour. Rain with high intensity most often begins suddenly. A large amount of precipitation falls on the ground within a short period of time. This type of rain often begins with thunder and lightning. It is usually observed in the summer and late spring.
• Drizzle. It has medium-sized drops and falls from layered clouds. It often lasts for a long time, even several days, with periodic interruptions for short periods of time. In most cases, drizzling rain occurs in autumn.
• Mushroom rain. This type of rain has large drops and occurs in sunny weather. Most often, mushroom rain does not last long.
• Rain with hail. Along with raindrops, ice pellets (hail) of various sizes fall from the sky. In some cases, falling ice can pose a certain danger to people, animals and property in the open air.

In most cases, rain is classified into types according to the following characteristics:

• Intensity. Indicates the speed at which precipitation falls, measured in millimetres per hour (mm/h). Light rain – 1-5 mm/h, moderate rain – 5-20 mm/h, heavy rain – 20-40 mm/h, downpour – more than 40 mm/h.
• Drop size. Raindrops range in size from 0.5 mm to 7 mm.
• Duration. The length of time that rain falls. Rain can fall for a few minutes or several days, with short breaks.

Taking all these factors into account, it is customary to divide rain into certain types.

The main functions of rain

Rain performs a number of functions that are important for both nature and human life. Here are the most significant functions of rain:

• The water cycle in nature. Rain is the most important stage in the water cycle in nature. It moistens the soil, nourishes plants with water and supports ecosystems.
• Temperature regulation. Rain helps to cool the air and the earth, which is especially important in the summer. Without rain, excessive heating of the earth’s surface could have catastrophic consequences for humans and life.
• Air purification. Rain washes various harmful substances such as smoke, dust and gases out of the air. This improves air quality for all living creatures.
• Redistribution of fresh water. Rain redistributes fresh water across the planet. In some regions of the Earth, rain is the only source of water.
• Irrigation of agricultural crops. Drought can cause great harm to agricultural crops, even leading to their destruction. Rain helps to cope with this problem.
• Use of rainwater. In some cases, rainwater is collected and used for a variety of purposes (watering agricultural plants, domestic use, use in public utilities).
• Source of energy. In some countries, rain is used to generate hydroelectric power and convert it into electricity.

It is worth remembering that rainwater cannot always be used; it must first be purified.

The importance of rain for life

The importance of rain for sustaining life on planet Earth cannot be overestimated. This is because water is essential for life. It is rain that allows plants to be filled with moisture, enabling them to live, produce oxygen and provide food for animals.