EARLY CONVECTIVE DEVELOPMENT.
About midday, the extreme western portion of the outflow boundary began to weaken, as heating and mixing eroded the rain-cooled air. Clusters of convection began forming over northeast Kansas at the junction of the outflow boundary and cold front.
For readers with an MPEG viewer the attached animated loop of this evolution shows the changes most clearly.
While the outflow became less obvious, the cold front had become moreso in both surface observations and visible satellite imagery. Animated imagery showed rapidly developing convection along the front in western Kansas as the strong shortwave from southeast Colorado entered the region. The rapid growth of the convection along the front indicated that dynamic support was very strong. Also, during this period, a thick cumulus cloud field developed in the warm sector east of the cold front and south of the outflow boundary over much of eastern Oklahoma and eastern Texas.