A thunderstorm is a storm with heavy rainfall accompanied by wind, thunder and lightning. These storms occur when air that is moist and close to the ground heats up and rises to form cumulonimbus clouds that produce prec... More »

Thunderstorms form when the three required atmospheric conditions of sufficient moisture, unstable air and a lifting mechanism are present. In the United States, thunderstorms are most common in the spring and summer mon... More »

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Thunderstorms are formed by the combination of three main ingredients: moisture, unstable atmospheric air and an external acting force making the damp and volatile air rise upward. Thunderstorms come in several different... More »

An isolated thunderstorm is a rain-producing storm that impacts a relatively small portion of a meteorologist's forecast territory. Aerostorms indicates that an isolated T-storm affects only 10 to 20 percent of a populat... More »

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Thunder is caused by lightning, so it cannot happen independently. The loud cracking sound of thunder occurs when lightning raises the surrounding air temperature by thousands of degrees, causing it to rapidly expand and... More »

The air surrounding a bolt of lightning heats up so rapidly that it forces the air to quickly expand, creating the sound of thunder. Lightning can instantly heat the air to over 48,000 degrees Fahrenheit, which doesn't g... More »

The old folk tale that a hot summer evening can cause lighting without a thunderstorm is false. What is known as "heat lightning" is normal lightning generated by a thunderstorm that's too far away for thunder to be hear... More »

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