As advertised for the past week, a strong cold front is advancing southward through Texas at early afternoon. You can actually see the front on the above radar image from radar site near Killeen (note the fine line extending from between Johnson City & Austin, through Austin to near Caldwell.
Temperatures are in the lower 80s ahead of the front, and drop sharply into the 50s behind it (note the surface observations overlaid on the radar image). This dramatic change will spread Southward along the I-35 corridor from Austin to San Antonio over the next couple of hours.
If you're like me and are smoking a turkey outside, prepare to boost the heat a bit as outdoor temperatures begin to fall over the next couple of hours.
Showers and a few thunderstorms are breaking out ahead of the front over east-central Texas. Isolated activity is possible further southwest along the front as well, as the afternoon progresses.