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Updated live from Wikipedia, last check: June 04, 2012 22:52 UTC (46 seconds ago)
From Wikipedia, the free encyclopedia
A power flash caused by a tornado hidden by heavy rain.
A power flash is a flash of light caused by arcing electricity from damaged electrical
equipment. They are often caused by tornadoes, and thus are used by storm spotters to
spot tornadoes which would otherwise be invisible due to rain or
darkness.