From Rusty Garrett:
An upper-air disturbance moves into Central Texas Thursday and Friday, bringing with it - the chance of rain and possibly a few strong thunderstorms.
Slightly better rain chances are in the forecast late tonight as thunderstorms from the Concho Valley creep close to Central Texas overnight, mainly after midnight.
Severe weather is possible Thursday afternoon, but the severe weather risk may depend on how much overnight rain falls tonight. Any thunderstorms that form Thursday may quickly strengthen, possibly containing frequent lightning, heavy rain, strong wind gusts, and some hail. Showers and thunderstorms may continue through the evening hours Thursday.
Another chance of heavy rain and a few possibly stronger thunderstorms is possible Friday as the upper-level storm system begins to move out. The greatest chance for strong thunderstorms will be near and east of I-35, with thunderstorms moving eastward throughout the afternoon. Once again, Friday's severe weather chances depend on overnight rainfall Thursday night. Showers and thunderstorms should end during the early evening hours Friday.