From Brady Taylor:
The humid and generally rainy weather pattern is coming to a close, only to be replaced by summertime heat and humidity thanks to lingering moisture near the surface. Skies will gradually and partially clear throughout the day Thursday and the additional sunshine will push temperatures above average into the lower and middle 90s. With afternoon dew points in the lower 70s, heat index values will range from 98° to 104°. Rain chances Thursday will be the lowest they've been in days, staying near 10% as only an isolated shower or two moves through during the day, mainly near and east of I-35.
Skies will turn mostly clear for the upcoming weekend allowing temperatures to climb well above average Friday, Saturday, and Sunday. High temperatures Friday are expected to reach the upper 90s and lower 100s with heat index values ranging from 100° to 107°. Saturday's temperatures will be a touch cooler, still staying in the upper 90s while heat index values top 100°. Sunday will also be a bit cooler as well as highs stay in the middle and upper 90s, but heat index values should still be able to climb over 100°. The only real saving grace from the hot weather will come from strong southerly winds this weekend. Friday's winds will be relatively weak out of the south-southwest, but southerly winds Saturday and Sunday will range from 15 to 25 miles per hour, gusting to near 30 miles per hour at times.
High pressure will loosen its grip on the area next week. Skies will turn partly cloudy during the day, but rain chances remain out of the forecast. Afternoon highs Monday, Tuesday, and Wednesday stay in the middle to upper 90s. Humidity will start to filter out of the atmosphere so heat index values will be lower than this weekend, but it'll still feel quite summer-like across Central Texas.