Ask Storm Team 11: What is the difference between positive and negative lightning?

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Today’s Ask Storm Team 11 question was submitted by Dave Denis. He said “Lightning can be positive or negative. What is the difference and why is it necessary to know which is prevalent?”

The difference between positive and negative lightning is that positive lightning transfers a positive charge to the ground, while negative lightning transfers a negative charge. Positive lightning is much more dangerous and accounts for less than 5% of all strikes. Positive lightning can also strike up to 25 miles away from precipitation (called a bolt from the blue) and has a stronger electric field and longer flash duration. 

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