This is a we chased in South Dakota. This video clip was shot in Alpena, SD. Robert Brown in the background is heard telling a car to go back because the storms rotation was getting tight and produced a tornado just before the went off. This tornado was virtually impossible to see because of the lighting contrast and it wasn't until a year later it was confirmed. The tornado actually took out the power and that is why the power cut off. (Still cameras did capture images of the tornado and they can bee see at http://exwx.net)

This was a beautiful storm that produced hail up to 3" and mutiple and

Source: June 24 2009 Alpena, SD Tornado (Youtube).

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