Tornadoes from space

Various programmatic units at NASA have all been using the Oklahoma tornadoes to demonstrate their relevance to Planet Earth. 

You can watch a grainy video of the storms forming at Visible Earth.

Looking at Earth has higher resolution full color imagery and video.

Or, you can see the swatch of destruction in Terra's ASTER device. This is the one that really amazed me. You can see the path of destruction clearly in these images once you zoom in a little.