From Rusty Garrett:
A Heat Advisory for much of Central Texas has been extended and now set to expire Saturday evening at 6pm. This signals the threat of a heat index, or "feels like" temperature between 103° and 108°!
Even beyond that expiration this weekend, be sure to stay cool and very well hydrated! Rain chances remain very low at 20%. Lows overnight will fall into the mid to upper 70s under mostly clear skies.
Weekend weather should remain hot and humid with highs in the upper 90s to near 100°! A low chance for rain will continue both Saturday and Sunday as weak disturbances and outflow boundaries move into North Texas. A nearby upper-level ridge of high pressure should help to prevent any widespread showers and storms from forming, however isolated rain will be possible at times.
The upper-level ridge is expected to build back over Texas heading through next week, cutting off any possible rain chances for Central Texas. The typical August heat should persist with highs in the upper 90s to near 100°, with overnight lows in the mid to upper 70s.