From Rusty Garrett:
Humidity values were only marginally better across the northern half of Central Texas. This, behind a stalled frontal boundary which will remain the trigger for a very few isolated showers and thunderstorms through sunset this Tuesday.
For the remainder of the week, we don’t expect much relief in the temperatures. The only bright side, temperature-wise, will be another morning set of lows in the lower 70s Wednesday, but mainly north of Waco!
A Summer ridge of high pressure will continue to strengthen over Central Texas late this week, strong enough to cap rain chances and keep skies mainly clear. The long range forecast doesn't show much of a break from the heat either, since the ridge is forecast to remain near the Southern Plains or Southeastern U.S. potentially through the end of the month.