From Brian Germ:
Overnight temperatures will cool off into the upper 30s and lower 40s by Sunday morning as winds shift to the southeast. Cloud cover and moisture will increase by Sunday morning, with scattered showers and thunderstorms possible during the afternoon and evening hours. Rain and storm chances will be around 40% with the focus being along and east of I-35. Highs Sunday will be warmer in the 60s and lower 70s. Winds will be out of the south at 10 to 15 mph.
An unsettled weather pattern will be in place across Central Texas from late Sunday through Tuesday as several disturbances pass through the region. Warm and humid air will return during this time period, with highs expected to be into the 70s and lower 80s Monday and Tuesday. Enough instability will be in place for a few strong to severe storms to potentially form. The severe weather risk appears low at this time however areas of Central Texas, especially east of I-35, will have to monitor the development of thunderstorms when they form. Rain and storm chances Monday and Tuesday will be around 30%.
A strong cold front is expected to push through Central Texas overnight Tuesday into Wednesday morning bringing another shot of cooler air. A dry, cool, and quiet weather pattern should be in place for the middle and end of the week before low rain chances return by next weekend.