Official National Weather Service and private forecasts for Dallas on August 10 indicate highs near 97–101°F under seasonably hot summer conditions with southwesterly flow and modest moisture. Afternoon thunderstorm chances around 20% introduce the main uncertainty, as early or widespread convection can cap peak temperatures by limiting insolation and increasing evaporative cooling. Ensemble guidance shows tight clustering around 98–102°F, consistent with Dallas’s August climatology of upper-90s to low-100s highs and typical variability from boundary-layer mixing and cloud cover. Traders price the narrow spread among 98–99°F, 100–101°F, and 102–103°F bins to reflect this modest forecast dispersion rather than any extreme outlier.