**Thunderstorm development this afternoon is the dominant factor capping Denver's high temperature on August 14.** Official National Weather Service forecasts project a mostly sunny morning giving way to increasing clouds and scattered to likely thunderstorms by early afternoon, with model consensus pointing to highs of 82–86 °F as widespread convection reduces solar heating and introduces evaporative cooling. Recent upstream moisture and modest instability have sustained this pattern after earlier heat, keeping the daily maximum below seasonal normals near 88 °F. The tight clustering of market-implied odds around 82–85 °F reflects uncertainty in exact storm timing and coverage: earlier or more intense cells favor the lower end of that range, while delayed development could allow brief warming into the mid-80s. Updated NWS briefings and radar trends through peak heating hours remain the key near-term catalysts.