The storm appears to be circultaing around the Low pressure which is currently to the east of Houston. David Paul forecast at 9:57 see link here
discusses how he expects the center of the low pressure to track either to the southwest or to the west. The heaviest rain will follow the track of the low and flooding is likely along this track. It will only take 5 inches or so to add to the flooding as the bayous and streams are already above their banks.