Record Long Lightning Bolt (Updated)

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Above is a type of lightning bolt that meteorologists call an "anvil crawler." They travel horizontally along the upper part of a thunderstorm(s). 

Smithsonian published an article recently about an anvil crawler that moved from Texas to Missouri -- a distance of more than 500 miles in about six seconds! This lightning event occurred in October, 2017. 
If you wish to read the entire article it is here. 

UPDATE:  The Wall Street Journal had a (possibly paywalled) story about the lightning bolt today. 

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