Details: This poster shows a two lane road heading straight back. At the same point where the road disappears on the horizon, a huge lightning bolt is striking the ground. The clouds in the sky are black and red from the storm.
Lightning is an atmospheric discharge of electricity, which usually occurs during rain storms, and frequently during volcanic eruptions or dust storms. Thunderstorms are the primary source of lightning. A bolt of lightning can reach temperatures approaching 28,000 degrees C (50,000 degrees F) in a split second. On average, lightning strikes the earth about 100 times every second.