Storms of 2013 - Jeff Frame
El Reno Structure

El Reno Structure

Prior to the final storm merger that may have led to the catastrophic tornado near El Reno, Oklahoma, on May 31, 2013, the storm exhibited decent supercell structure, with a highly-visible rain-free base, inflow tail, and mesocyclone. The small cell that collided with the supercell came over us following this shot, unexpectedly dropping ping-pong ball-sized hail. Taken near Lookeba, Oklahoma.

mesocycloneupdraft baseinflow tail