What is precipitation? Precipitation is any form of moisture which falls to the earth. This includes rain, snow, hail and sleet. Precipitation occurs when water. Frontal rainfall happens where warm fronts meet cold fronts. The British Isles are Convectional rainfall is common where the sun heats the land near the sea. Convection occurs when the Earth’s surface, especially within a Convective rain and light precipitation are the result of.

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November 11, – 7: It warms up and therefore becomes drier. Views Read Edit View history. In the initial stages rainfaall this precipitation, it generally falls as showers with rapidly changing intensity.

British weather and climate

Convective precipitation occurs when air rises vertically through the temporarily self-sustaining mechanism of convection.

Heat from the sun transforms water in oceans and seas into a gas called water vapour. Also, the warm air is in contact with the cold air along the fronts, and this also cools. If you’ve found the resources on this page useful please consider making a secure donation via PayPal to support the development of the site.

These tiny droplets of water from clouds.

Precipitation types – Wikipedia

What is population distribution? Orographic or relief rainfall is caused when masses of air are forced up the side of elevated land formations, such as large mountains often referred to as an upslope effect. Archived from the original on Stratiform precipitation occurs when large air masses rise diagonally as larger-scale atmospheric dynamics force them to move over each other.


Convectionzl cools and condenses. Convection occurs when the Earth’s surface, especially within a conditionally unstable or moist atmospherebecomes heated more than convdctional surroundings and in turn leading to significant evaporation. Pin It on Pinterest. Please Support Internet Geography If you’ve found the resources rainffall this site useful please consider making a secure donation via PayPal to support the development of the site.

The warm air is forced over the cold air Stage 3. Moderate rain describes rainfall with a precipitation rate of between 2. This occurs when less dense moist air cools, usually when an airmass rises through the atmosphere. Relief rainfall Prevailing winds bring warm, moist air to the western British Isles.

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They form in the Atlantic and move east across the country, bringing changeable weather. Related Topics Use the images below to explore related GeoTopics. All articles with dead convectionql links Articles with dead external links from July Webarchive template wayback links Wikipedia articles needing clarification from April Precipitation can fall in either liquid or solid phases, or transition between them at the freezing level.

Convective precipitation falls over a certain area for a relatively short time, as convective clouds have limited vertical and horizontal extent. Take a look at our new resources in the shop Dismiss. Rain occurs along the front. Air descends on the other side of the mountains. Convectional rainfall When the land warms up, it heats the air above it. Tropical downpour in Hong Kong.

Light rain describes rainfall which falls at a rate of between a trace and 2. First, a warm front passes over, bringing rain and then warmer air. Convective and stratiform rainfall in the tropics. Precipitation duration is often shorter and generally more intense than that which occurs ahead of warm fronts.


Convective rain and light precipitation are the result of convective clouds, for example cumulonimbus or cumulus congestus.

As the warm air is forced to rise it cools. Orographic precipitation occurs when moist air is forced upwards over rising terrain, such as a mountain. Moisture is removed by orographic lift, leaving drier air see Foehn on the descending generally warmingleeward side where a rain shadow is observed. When the land heats up, it warms the air above it.

As the air rises it cools and condenses. Why does most conevctional fall in the west? Heavy rain describes rainfall with a precipitation rate convectonal 7. These usually include thunder and lightning due to the electrical charge created by unstable conditions. Kerala flood case study. When classified according to the rate of precipitation, rain can be divided into categories. What factors affect climate?

The following examples show three different ways air is cooled causing rainfall.

Precipitation types

Warm fronts occur where warm air pushes out a previously extant cold air mass. It happens as the result of warm, moist air being cooled, leading to condensation and in turn rain. What is convectional rainfall? Bulletin of the American Meteorological Society.

This includes rain, snow, hail and sleet. What is low pressure?

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