This happened in the middle of the night, the storms stalled out because there’s no trough nearby to expedite getting Barry’s remnants out, and the terrain/rock hard ground problem exacerbated it. It had zero to do with “weather modification”. I wasn’t paying enough attention to see if the NWS dropped the ball and the funding cuts are obviously a huge outrage and problem, but this is KNOWN to be a major problem in Central TX especially. There was 16” of rain in one morning in Austin from the remnants of Hurricane Patricia in Oct 2015 which is bar none the heaviest rain I’ve ever seen. Likely even puts Ida to shame. The Austin to San Antonio corridor is known to get tons of rain in a short period of time, but is otherwise pretty dry. And when it falls over the limestone Hill Country, it rampages down the hills into small creeks and as we see here, even the larger rivers can be overwhelmed fast.