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UNSW : UNSW Atmosphere Study Guide
Atmosphere Study Guide 12 Engage Electric web Ribbons of lightning streak across a purple night sky during an electrical storm in Wyoming in June 2003. The electric field within a storm is much stronger than the one between the storm base and the Ear th‘s surface so about 75-80% of lightning occurs within storm clouds. A lightning spark can raise the temperature of the air around it by up to 28,000°C.