Tornado with dust and debris cloud forming at surface. During "Sound Chase", a joint project of NSSL and Mississippi State University. Oklahoma, Cordell. May 22, 1981. Credit: NOAA Photo Library, NOAA Central Library; OAR/ERL/National Severe Storms Laboratory (NSSL). | Foto: NOAA Photo Library, NOAA Central Library; OAR /ERL / National Severe Storms Laboratory (NSSL)