From Rusty Garrett:
For the fifth day in a row, highs Wednesday afternoon climbed into the middle 90s with heat indices in the low 100s! However, some relief from the abnormally warm weather is in sight later this week in the form of increasing rain chances.
Overnight temperatures drop again, into the low/mid 70s, which is well above the normal low of 65°. Highs Thursday will be a touch milder than Wednesday, in the upper 80s and low 90s. The drop in temperatures day-to-day is attributed to a few more clouds expected and a chance for those late afternoon showers and thunderstorms.
The remnants of Tropical Depression 19-E, which formed Wednesday morning in the Gulf of California will move into Texas Thursday afternoon. The center of the system will gradually move eastward toward Central Texas Friday and Saturday as a weak front stalls out to our north. These two elements will combine to produce widespread rain coverage. Highs Friday may only reach the middle and upper 80s.
Rain chances jump to 70% Saturday as the low moves closer. Again, widely scattered rain and thunderstorms will be most likely during the afternoon and early evening. Rain will be locally heavy at times, but fortunately our severe storm risk will be low.
If you're hoping for cooler, Fall-like temperatures, you may not have to wait too long, as long-range forecast model data is suggesting a stronger cold front will move through Central Texas late next week bringing below normal temperatures.