Sorry if a repost but i saw these and thought they were worth a post. Amazing!
enormous 'supercell' cloud
It looks like something from the film Independence Day.
But although it may seem like an alien mothership, this incredible picture is actually an impressive thunderstorm cloud known as a supercell.
Windswept dust and rain dominate the storm's centre while rings of jagged clouds surround the edge.
A flimsy tree in the foreground looks like a toy next to the magnificent natural phenomenon
Read more: http://www.dailymail.co.uk/sciencete...#ixzz16xK0L4bV