Tornadoes typically decrease in intensity and frequency as atmospheric conditions change. Factors such as the dissipation of the supercell thunderstorm that produces them, a reduction in wind shear, or the stabilization of the atmosphere can lead to their decline. Additionally, the loss of warm, moist air that fuels thunderstorms can also contribute to a decrease in tornado activity. As these conditions stabilize, tornadoes become less likely to form or sustain themselves.
Ultimately, the two primary causes of tornadoes are convective instability, which leads to thunderstorms, and wind shear, which gives those storms the rotation they need to produce tornadoes.
Balloons deflate in the cold because cold air causes the gas inside the balloon to contract and decrease in volume. This decrease in volume leads to a decrease in pressure inside the balloon, causing it to deflate.
No single air mass "causes" tornadoes. This is Tornadoes form within thunderstorms. Thunderstorms form best when there is plentiful warm, moist air. So, a arm, moist air mass is usually present. Significant tornado activity, however, usually results from the thunderstorms that form near the boundaries between air masses. Usually where a warm, moist air mass meets a cooler or drier air mass.
No, the Coriolis effect is not caused by tornadoes. The Coriolis effect is a result of the Earth's rotation and causes moving air to be deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. Tornadoes, on the other hand, are rotating columns of air associated with severe thunderstorms.
Tornadoes form from powerful, spinning thunderstorms called supercells. Sometimes some of the spinning air can start to squeeze tighter, which causes it to spin faster and stretch toward the ground. When it reaches the ground a tornado is born.
Ultimately, the two primary causes of tornadoes are convective instability, which leads to thunderstorms, and wind shear, which gives those storms the rotation they need to produce tornadoes.
Tornadoes come in all seasons but are most common in spring and summer.
Humans do not cause tornadoes. While climate change may affect tornadoes, it is still uncertain how exactly this will play out.
Insulin is the hormone that causes the blood sugar level to decrease.
Tornadoes form in the southern hemisphere for the same reason they form in the northern hemisphere. The mechanics are the same. See the related question for what causes tornadoes
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Condensation and wind shear are both needed for tornadoes to form. Tornadoes can form along stationary fronts as well.
The winds in tornadoes are extremely fast. The winds can push against and tear away at objects. Winds in tornadoes often carry flying debris that causes damage on impact.
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