The storms currently in progress have a good 1000-2000 j/kg of instability to work with, which should sustain any storms that do develop. But then here's the thing that could push the storms to the next level- frontogenesis.
|Current Surface Frontogenesis|
My Thoughts include that these storms will move into southeast Texas, where more instability will be available. As the sun sets, daytime heating will take a big punch out of storms, but if there remains strong frontogenesis and fair lifting and instability mechanisms, the storms could certainly continue along through the night.