Forecast models from NOAA and NWS project Austin overnight lows near 73–78°F on August 24 under persistent high pressure, with historical August averages around 75°F. However, a noted tropical storm threat for August 23–25 introduces forecast spread, as increased moisture, cloud cover, or rainfall could enhance radiative cooling and push the minimum toward or below 73°F, while continued clear, hot conditions might keep it near or above 78°F. This genuine model divergence—particularly in steering patterns and timing of any weak front or moisture surge—explains the near-even market-implied odds on the 73°F-or-below versus 92°F-or-higher outcomes, with middle buckets reflecting lower consensus around typical values. Updated model runs and NHC briefings in the next 24 hours will likely narrow the range.