From Sean Bellafiore:
A heat advisory remains in place for Coryell, Bosque, Hill, McLennan, Bell, Falls, Milam, Robertson, Leon, Limestone, and Freestone Counties until 4 PM Thursday. High temperatures Wednesday afternoon climb into the upper 90s and lower 100s under mostly sunny skies. Heat index values may climb as high as 107° this afternoon, especially in larger cities. Southerly winds gusting to near 20 miles per hour at times may give you some relief from the heat, but not by much. Outside of an isolated shower or two (10% chance) east of I-35 and south of Highway 84, Central Texas will remain dry.
Overnight lows fall slowly into the middle and upper 70s with heat index values in the lower 80s by daybreak with partly cloudy skies overhead. Temperatures Thursday and Friday will be downright hot, reaching the upper 90s for some but lower 100s for most. Heat index values Thursday and Friday may climb as high as 109° with mostly sunny skies through much of the day.
Relief from the heat is in sight as a cold front sinks into the eastern United States later this week and into the weekend. The tail end of the cold front should be able to make it into Central Texas bringing with it the chance for scattered showers and thunderstorms in addition to cooler weather. Highs Saturday still may reach the upper 90s with heat index values near 106°, but a few scattered showers may cool you off during the afternoon and evening. Rain chances Saturday hover near 30%.
Cooler air will move into Central Texas Sunday through the beginning of next week. A few more isolated showers may form during the day Sunday with rain chances near 20% as the cold front stalls to our south. High temperatures Sunday still may reach the middle 90s with heat index values staying below 100°. Scattered afternoon rain remains in the forecast Monday and Tuesday with rain chances near 30%. High temperatures will be a few degrees below the average of 98° as afternoon temperatures only reach the lower and middle 90s.