EESC1168 Lecture Notes - Lecture 33: The Little Review, Wall Cloud, Thunderstorm
20 Apr 2017
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Document Summary
When multiple weather systems collide, violent, cyclonic storms can develop. This process creates the type of storm that generates most tornadoes. Supercell thunderstorm - start to generate tornadoes, but don"t always. As spinning vortices stretch, they must spin faster in order to conserve angular momentum - against the wall cloud, which stretches to touch the ground. As the tornado stretches thinner and thinner, it goes faster and faster. When tornadoes touch down, they create a debris cloud of dust and other items blown by the winds. Tornadoes occur often when a warm, high-energy air mass collides with a powerful, cold air mass. A large collision zone can create several supercell storms that generate tornadoes, resulting in a tornado outbreak. Sometimes, multiple bands of storms create multiple tornado outbreaks at the same time, or a super outbreak. Have the weather conditions for a tornado, and multiple happen to occur for long periods of time, over a widespread area.
