Anvil crawler
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Anvil crawler

by Oliver Schlenczek, Max Planck Institute for Chemistry, Mainz, Germany

This kind of lightning is often observed from squall line thunderstorms. In this case, a squall line with a length of more than 1000 miles crossed the Central Plains of the United States. This photo was captured in Okmulgee, Oklahoma in the wake of the thunderstorm, looking southward.