1. 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.
thunderstorm |
2. Thunderstorms occur in a type of cloud known as a cumulonimbus.
cumulonimbus clouds |
3. Thunderstorms result from the rapid upward movement of warm, moist air, sometimes along a front. As the warm, moist air moves upward, it cools, condenses, and forms a cumulonimbus cloud that can reach heights of over 20 kilometres (12 mi). As the rising air reaches its dew point temperature, water vapor condenses into water droplets or ice, reducing pressure locally within the thunderstorm cell. Any precipitation falls the long distance through the clouds towards the Earth's surface. As the droplets fall, they collide with other droplets and become larger. The falling droplets create a downdraft as it pulls cold air with it, and this cold air spreads out at the Earth's surface, occasionally causing strong winds that are commonly associated with thunderstorms.
4. In a typical thunderstorm, approximately 5×108 kg of water vapor are lifted, and the amount of energy released when this condenses is 1015 joules.
5. This is on the same order of magnitude of energy released within a tropical cyclone, and more energy than that released during the atomic bomb blast at Hiroshima, Japan in 1945.
Safety measures during a thunderstorm:
6. Take action immediately upon hearing thunder. Anyone close enough to the storm to hear thunder can be struck by lightning
7. Avoid electrical appliances, including corded telephones Cordless and wireless telephones are safe to use during a thunderstorm.
8. Close and stay away from windows and doors, as glass can become a serious hazard in high wind.
9. Do not bath or shower, as plumbing conducts electricity.
10.If driving, safely exit the roadway; turn on hazard lights, and park. Remain in the vehicle and avoid touching metal
11.Get inside a substantial building or hard-topped metal vehicle before threatening weather arrives.
12.Avoid open areas like hilltops, fields, and beaches, and don't be or be near the tallest objects in an area when thunderstorms are occurring
13.Don't shelter under tall or isolated trees during thunderstorms.
14.If in the woods, put as much distance as possible between you and any trees during thunderstorms
15.If in a group, spread out to increase the chances of survivors who could come to the aid of any victims from a lightning strikes.
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