This type of rain is common in hilly or mountainous areas. It is common in the eastern part of Ghana.
Where does relief rainfall occur?
Relief rainfall occurs when warm moist air from the Atlantic Ocean rises up over mountains. When the warm air rises, it cools and condenses to form clouds, which bring rain. Once the air has passed over the mountains, it descends and warms. This creates drier conditions known as a rain shadow .
Where is relief rainfall most common?
Relief rainfall, also known as orographic rainfall, occurs in areas where land increases in height. It is very common on the west coast of the United Kingdom due to the prevailing weather coming from that direction.
What are the examples of relief rainfall?
Check the heavy relief rainfall over NW Scotland! Relief rainfall is happening here because warm moist air from the SW is being forced to rise over the Scottish mountains, where it cools, condenses, forms clouds and then rains… heavily!
Where does Convectional rainfall occur?
Convectional rainfall is widespread in areas where the ground is heated by the hot sun, such as the Tropics. This is why areas, such as the Amazon Rainforest, experience heavy rainfall most afternoons.
What are the 4 types of rainfall?
Types of Rainfall
- Convectional rainfall.
- Orographic or relief rainfall.
- Cyclonic or frontal rainfall.
Why does rainfall happen?
What causes rain? Clouds are made of water droplets. Within a cloud, water droplets condense onto one another, causing the droplets to grow. When these water droplets get too heavy to stay suspended in the cloud, they fall to Earth as rain.
What is orographic rain?
Orographic precipitation, rain, snow, or other precipitation produced when moist air is lifted as it moves over a mountain range. As the air rises and cools, orographic clouds form and serve as the source of the precipitation, most of which falls upwind of the mountain ridge.
Why is convection called 4 o’clock rain?
In the equatorial regions, convectional rainfall is received almost daily in the afternoon. It generally happens regularly at 4 p.m. throughout the year. For this reason it is called 4’o clock rainfall. … In the late afternoon the clouds burst into a heavy downpour often accompanied by thunder and lightning.
Why does the UK get lots of frontal rainfall?
Frontal rainfall
When a cold polar air mass meets a warm tropical air mass they do not mix – they form fronts. The colder air mass is heavier than the warmer air mass, therefore the lighter, warmer air rises over the top of the heavier, colder air. … Rain occurs along the front.
What are the 3 types of rain?
There are 3 main types of rainfall: relief, frontal and convectional.
How many types of rain are there?
Types of Rainfall – Relief, Convectional, and Frontal Rainfall.
Where does orographic rainfall occur?
Orographic precipitation, rain, snow, or other precipitation produced when moist air is lifted as it moves over a mountain range. As the air rises and cools, orographic clouds form and serve as the source of the precipitation, most of which falls upwind of the mountain ridge.
What is Convectional rainfall also called?
Convectional rainfall is also called 4 o ‘clock rain: Convectional rainfall is the result of high rate of evaporation. Then condensation takes place and rain falls. At mid-day, when the sun is at the highest position, the temperatures rise at the equator.
What is another name for Convectional rainfall?
Answer. Answer: Convective rain and light precipitation are the result of convective clouds, for example cumulonimbus or cumulus congestus.
Where does frontal rainfall usually form?
Frontal rain is found where warm air meets cold at the cold and warm fronts in a depression (Figure 1).