A giant waterspout in the mature stage. During peak intensity this waterspout had a diameter of approximately 30 meters (via NOAA)
Oldest known photograph of a tornado. South Dakota, 22 miles southwest of Howard. August 28, 1884 (by NOAA Photo Library)
Tornado in mature stage. Seymour, Texas, April 10, 1979. (Photographer: D. Burgess; via NOAA)
Project Vortex-99. Occluded mesocyclone tornado. Occluded means old circulation on a storm; this tornado was forming while the new circulation was beginning to form the tornadoes which preceeded the F5 Oklahoma City tornado. Photo #3 of sequence. Oklahoma 7 miles south of Anadarko. May 3, 1999.
(Credit: OAR/ERL/National Severe Storms Laboratory (NSSL); by NOAA Photo Library)