After the convection developed rapidly, the CI and CTC products became masked due to the TS plumes.  However, the convection at the north end of the CWA may have kicked out an outflow bndry to cause more development in clear air.  This was picked up by the CI product with an increasing signal in subsequent frames.

A stronger (yellow) signal was evident on the next frame.

The resulting composite reflectivity (upper right image), showing development to 45dbz 15 minutes later.  Comp reflectivity was used here due to beam blockage at 0.5 degrees.