The defining weather feature for Southeast Texas this week is a surface system of high atmospheric pressure that builds overhead by Sunday.

Afternoon highs will soar to the mid 90s today with very isolated rain chances. Showers and storms will increase in coverage Monday and Tuesday. Expect heavy downpours at times with frequent lightning. Once this system passes, we are looking at a drier end to the week.

We are expecting a daily scattering of summer downpours in the greater Houston-area today and tomorrow. It's going to be a warm afternoon in the 90s.