From Sean Bellafiore:
A cold front is surging into Central Texas and will become the focus point for potentially severe thunderstorms throughout the day. Ahead of the front, an isolated pop-up thunderstorm may form, especially near and east of I-35. If a pop-up thunderstorm forms ahead of the cold front, it will quickly turn severe with large hail, strong winds, and an isolated tornado all possible. The cold front will sweep across the area through the afternoon and early evening. Storms along the front will strengthen as it approaches I-35 and should maintain intensity as it moves east of the interstate. The front should arrive near the I-35 corridor between 4 PM and 6 PM before exiting our eastern counties around 10 PM. A few more isolated thunderstorms may form behind the front. If storms form behind the front, they will be substantially weaker and only pose a threat of lightning and up to quarter-sized hail.