Recent National Weather Service forecasts for Dallas on May 18 point to a high near 88°F under partly sunny skies with a chance of afternoon thunderstorms, which could cap the daily maximum if widespread cloud cover develops. This outlook stems from a warm, moist southerly flow ahead of a weak frontal boundary, typical for mid-May in North Texas where climatological highs average 84–86°F. Ensemble model guidance shows modest spread, with some runs favoring isolated heating to 90–92°F in clearer pockets while others keep readings in the upper 80s due to earlier convection. Traders have clustered probabilities around 88–91°F to reflect these variables, including exact storm timing and boundary-layer moisture that can suppress or enhance peak surface temperatures by several degrees. Updated model runs and radar trends over the next 48 hours will likely refine the implied odds.