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<h3>Thunderstorms</h3>
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<p>PA thunderstorm is a weather system that can produce high winds, heavy rains, thunder, lightning, hail, and possibly tornadoes. In the atmosphere, air can move horizontally or vertically. Horizontal motion occurs as air masses move from one location to another. Vertical motion occurs as changes in temperature and pressure change the density of the air.</p>
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<h3>Lightning</h3>
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<p>Lightning is one hazard associated with a thunderstorm. Lightning is a fast flow of electrical energy between two charged surfaces, usually between the atmosphere and the ground. Laws of physics dictate that positive and negative charges must be equalized.</p>
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