This image is in the public domain because it was stored on the web servers of the U.S.
Storm Prediction Center, which is part of
National Weather Service. NWS-created images are automatically public domain in the U.S. since the NWS is a part of the U.S. government.
Thus all images on SPC servers are public domain.
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A radar image of a violently tornadic classic supercell near Oklahoma City, Oklahoma, USA on 3 May 1999. http://www.spc.noaa.gov/faq/tornado/radscel.htm
Category:Supercells
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