Mammatus clouds over Nebraska, an after effect of tornadoes. - via Don Halbert's photo on Google+
MOTHER NATURE / WEATHER PHOTOS
Kansas tornado: A rare close-up of a tornado from within 150 feet. The twister sucks up dirt as it churns across a rural landscape in western Kansas on May 8, 2008.
Tornado in a tornado
Oldest known photograph of a tornado. August 28, 1884. 22 miles southwest of Howard, South Dakota. National Oceanic & Atmospheric Administration
Eye of the Beholder
Tornado - Phil Campbell, AL
Mount Fuji Clouds - Holy Golly Gee Wow. This is even better than my one similar to this.
✮ F5 tornado More
Storms & Tornados