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Thunder Strom
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Thunderstorms are local storms characterized by swift upward movement of air and heavy rainfall with cloud thunder and lightning. According to A.N. Strahler “a thunderstorm is an intense local storm associated with large, dense cumulonimbus clouds in which there are very strong updraft of air.”
Because of heavy downpour associated with thunderstorms they are also called ‘cloud bursts’ but the rainfall is of very short duration. Thunderstorms differ from cyclones in that the latter are almost circular in shape wherein winds blow from outside towards the centre while the former is characterized by strong updraft of air. They are considered to be special case of convective mechanism.
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THUNDERSTORM
A storm with thunder and lightning and typically also heavy rain or hail, iscalled as Thunderstorm. A thunderstorm, also known as an electrical storm, lightning storm, or thundershower, is a storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere, known as thunder. Thunderstorms occur in association with a type of cloud known as a cumulonimbus. Thunderstorms are small, intense weather systems that make strong winds, heavy rain, lightning, and thunder. Thunderstorms can happen anywhere with two conditions: the air near the Earth's surface must be warm and moist (with lots of liquid), and the atmosphere must be unstable. A thunderstorm is a rain shower during which you hear thunder. Since thunder comes from lightning, all thunderstorms have lightning. The air cools as it rises. Water vapor condenses and forms cumulus clouds. When condensation occurs, heat (latent heat/energy) is released and helps the thunderstorm grow. At some point, condensation high in the cloud (now in the form of water droplets and ice) falls to the ground as rain. Multicell storms may produce hail, strong winds, brief tornadoes, and/or flooding. A squall line is a group of storms arranged in a line, often accompanied by “squalls” of high wind and heavy rain. Squall lines tend to pass quickly and are less prone to produce tornadoes than are supercells. Every thunderstorm produces lightning, which kills more people each year than tornadoes. Heavy rain from thunderstorms can lead to flash flooding, which is the number one thunderstorm killer. Strong winds, hail, and tornadoes are also dangers associated with some thunderstorms.
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