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How does a severe storm happen?

Updated: 8/11/2023
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15y ago

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Thunderstorms essentially begin when warm, humid air near the ground (or the sea) is pushed upwards by surface winds. The air rises rapidly, then cools. Storms are caused by differences in air temperature and pressure as a result of different air masses meeting and passing close by each other. The temperature imbalance within clouds causes the warm and cold air to ruch in, trying to equalise the air pressure imbalance. The continuous rushing of warm and cold air actually creates the thunderstorm, with the up and down rushing of air currents causing thunder, lightning and hail. As a storm cell is joined by surrounding winds, it can generate an even more powerful storm, with rain and hail. The rain and hail drag air downwards in a rush, causing strong gusts of wind that are capable of removing roofs and using loose objects as missiles. Cyclones (also known as hurricanes or typhoons, depending on their geographical location), can develop out of such storms when they begin at sea if a low pressure system is involved.

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15y ago
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15y ago

It is the frequency of thunder and lightning, not the amount of precipitation, amongst other some technical indices available only from radiosonde data. Sometimes there are distinctive patterns of movement discernable on weather radar.

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Q: How does a severe storm happen?
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