A strong upper level storm system will bring periods of showers and thunderstorms Sunday into Monday. The main focus remains Sunday afternoon through Monday morning. 1 to 2 inches of rain with isolated locations of 4-5 inches are possible along and east of the Interstate 35 & Interstate 37 corridors, with the highest amounts in the La Grange to Giddings areas. 1 inch or less is expected west of the US HWY 281 corridor, with amounts dropping to less than 1/2" along the Rio Grande. The higher rainfall amounts may cause flash flooding and a potential for river flooding. Stay tuned to later forecasts for updates on rain chances, rainfall totals, and potential flooding. A Slight risk of severe weather has expanded to most of the Hill Country and Rio Grande Plains with the main threats being strong thunderstorm winds and some hail.