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Supercell storm brings on France's 'darkest day'
From the Watch Now: Supercell storm brings on France's 'darkest day,' and more of today's top videos series
A supercell thunderstorm loomed over northern France on Saturday (June 19) and the weather agency called it the country's 'darkest day' this year.
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A supercell thunderstorm brought on France's "darkest day" of the year, watch an elephant br…
