Chadron, NE Supercell
This supercell developed in Wyoming late in the afternoon and drifted into northwestern Nebraska. It is very hard to see, but if you carefully examine the still there may be a tornado just off of the right side of the road.  Click here to see confirmation of a tornado near Chadron.  Tornado warnings were sounding, but I could not see the tornado due to poor visibility.  Due to the lack of a road network near Chadron, I could not get into postion to view the tornado clearly (also I was to far away).
The possible tornado becomes more clear when viewing the negative of the video capture.
Here is another view of the storm as the road veered away and it continues to get away from us.  The view is looking northeast.  A tail cloud is developing on the right side of the capture, a dry slot is pushing around the meso, and we are crossing the RFD boundary experiencing an abrupt wind shift.
A view of the flanking line from behind.  The view is looking in the southerly direction.  At this point trying to keep up with the storm was a lost cause.
Click here for a weather analysis of 6-12-01
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