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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This page was last edited on 16 Decemberat These usually include ocnvectional and lightening due to the electrical charge created by unstable conditions. Typhoon Haiyan Case Study. UK Weather and Climate What is an air mass?

When the condensation point is reached large cumulonimbus clouds are formed. Frontal rainfall The British Isles are affected by a number of different air masses. When classified according rainflal the rate of precipitation, rain can be divided into categories. As the warm air is forced to rise it cools. What are the air masses that affect the UK? Which types of rainfall commonly affect Britain? Heavy rain describes rainfall with a precipitation rate above 7. Rain or drizzle which freezes on contact within a subfreezing air mass gains the preceding adjective “freezing”, becoming known as freezing rain or freezing drizzle.

Frontal Rainfall Stage 1. In turn, precipitation can enhance the temperature and dewpoint contrast along a frontal boundary.

Clouds form and precipitation occurs. Prevailing winds come from the south west carrying moisture from the Atlantic Ocean. All rain is the same.


There are three distinct ways that precipitation can occur.

Stratiform precipitation occurs when large air masses rise diagonally as larger-scale atmospheric dynamics force them to move over each other. Rain occurs along the front. Why is the weather of the UK so changeable? What is global atmospheric circulation? Orographic precipitation occurs when moist air is forced upwards over rising terrain, such as a mountain. Sorry, your blog cannot share posts by email. Windward sides face the east-to-northeast trade winds and receive conbectional more rainfall; leeward sides are drier and sunnier, with less rain and less cloud cover.

Liquid forms of precipitation include rain and drizzle. Precipitation is measured using a rain gaugeand more recently remote sensing techniques such as weather radar. Heavy rain falling in Kolkata, India. In South America, the Andes mountain range blocks Pacific Ocean moisture that arrives on the continent, resulting in a desert-like climate convctional downwind across western Argentina.

This occurs when less dense moist air cools, usually when an airmass rises through the atmosphere. It happens as the result of warm, moist air being cooled, leading to condensation and in turn rain.

When the condensation point is reached large cumulonimbus clouds are formed.

What is convectional rainfall? November 11, – 7: Find out about relief and frontal rainfall. Light rain describes rainfall which falls at a rate of between a trace and 2. As the air rises it cools and condenses. When masses of air rainffall different densities moisture and temperature characteristics meet, the less dense warmer air overrides more dense and colder air.

Precipitation types

Weather and Climate – Grade or no grade game This game is provided by our sister site www. Moisture is removed rainfal orographic lift, leaving drier air see Foehn on the descending generally warmingleeward side where a rain shadow is observed. Convective and stratiform rainfall in the tropics.


When a cold polar air mass meets a warm tropical air mass they do not mix – they form fronts.

As the air rises it cools and water vapour condenses to form clouds. Convective rain and light precipitation are the result of convective clouds, for example cumulonimbus or cumulus congestus. Why does most rain fall in the west? If this process continues rainfall will occur.

What is convectional rainfall? – Internet Geography

The British Isles are affected by a number of different air masses. The site is self-funded and your support is really appreciated. Online Activities [Online activities]: Frontal precipitation typically falls out of nimbostratus clouds. They form in the Atlantic and move east across the country, bringing changeable weather.

This causes the air to expand and rise.

BBC Bitesize – KS3 Geography – British weather and climate – Revision 3

This type of rainfall is very common in tropical areas between the Tropic of Raijfall and Tropic of Capricorn but also in areas such as South East England during warm sunny spells. The Holderness Coast Case Study.

From Wikipedia, the free encyclopedia.