Severe thunderstorm with a clear slot near main updraft core. Typically a tornado, if present, will form in this area.

Image ID: nssl0049, NOAA's National Severe Storms Laboratory (NSSL) Collection
Photo Date: 1982
Credit: NOAA Photo Library, NOAA Central Library; OAR/ERL/National Severe Storms Laboratory (NSSL)

• High Resolution Photo Available