Recent National Weather Service and private forecasts converge on a 105°F high for Dallas on August 21 under sunny skies, light southwest winds, and minimal cloud cover, supporting the market's 52.5% implied probability for 104-105°F. Persistent high pressure and above-normal temperatures across North Texas, following consecutive 105-106°F readings on August 19-20, have kept the 106-107°F bin (30.5%) as the next most likely outcome, consistent with the 107°F all-time record for the date. Low humidity and heat indices near 110°F reflect typical late-summer conditions without significant model disagreement or incoming fronts that could alter peak readings. Updated model runs and official NWS briefings through the morning of August 21 remain the key near-term catalysts for any last adjustments in trader positioning.