Kevin Gould / NOAA
Before it swept through across the country, leaving some still without power, the now infamous derecho was captured in this June 29th image near LaPorte, Indiana. A huge shelf cloud -- a long, flat formation associated with thunderstorms -- can be seen on the derecho's eastern edge. Says NASA's knowledgable Flickr page, "Derechos have occurred before, and were actually given their name in the late nineteenth century."
Below, recent Pictures of the Day:
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