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Document Title: Rain storm in city. People with umbrellas (DI00383)
Description: City dwellers may be taken by surprise when thunderstorms sweep into town. Cumulonimbus, or thunderstorm, clouds produce rain, thunder, lightning, and if conditions are right, tornadoes. Thunderstorms form as the moisture in updrafts--rapidly rising, warm air--condenses into raindrops or hail, which begin to fall when the updrafts no longer have the energy to carry the heavy precipitation.
Creditline: copyright University Corporation for Atmospheric Research
Keywords: DI00383,weather,rain,city,people