Latest National Weather Service forecasts and GFS/ECMWF ensemble guidance place Dallas’s May 17 high near 84–86 °F under partly cloudy skies and moderate southerly flow. Traders assign 83% implied probability to the 86–87 °F outcome because typical May climatology at Dallas-Fort Worth International Airport centers around 85 °F, with afternoon heating and light winds often adding 1–2 °F beyond initial model runs. Southerly advection of Gulf moisture supports modest warming without significant cloud cover or precipitation that would suppress peaks. The low odds on 90 °F or higher reflect stable atmospheric conditions and the absence of strong high-pressure ridging or dry-air intrusions that would drive extreme readings. Resolution will depend on the official KDFW observation, with final model updates and real-time mesonet data providing the last inputs before market close.