The San Angelo CWA was expecting severe convection in the afternoon.  There was a NOAA-20 pass over their CWA at 1927Z.  A NUCAPS Sounding in the clear air ahead of ongoing convection was chosen.  The approximate point of this sounding is shown by the white circle in the left image.  The sounding in the right image showed an environment very favorable for severe convection, including hail.  Since ongoing severe storms were heading in this direction (left image), the storms could be expected to maintain their intensity or possibly strengthen.

– Champion