Persistent southerly flow and a warm, humid air mass over Central Texas kept overnight lows elevated in the mid-70s on September 12, aligning with late-summer climatology and recent NWS observations showing no cooling fronts or significant cloud cover to suppress temperatures. Model consensus from NOAA guidance reinforced this stability, with dew points near 74°F limiting radiative cooling and producing the market-implied 76-77°F low. A late-arriving weak front or localized measurement variance at the official Austin-Bergstrom station could still shift the final recorded minimum, though current data make such adjustments unlikely before resolution.