When the heavens open: The beautiful but devastatingly dangerous swirling clouds that gather before giving way to a tornado

At up to 50 miles wide and 65,000ft tall these supercell storms are
devastatingly beautiful, as they form over the central states in the
U.S. This stunning set of images were taken by Native American Camille
Seaman, as she joined storm chasers for the peak tornado season in May
and June, over four years.
