A cold front shifting winds from southerly to northerly across North Texas on October 15-16 drives the closely matched market odds, with models showing daytime highs near 67-70°F and overnight lows in the mid-50s under mostly cloudy skies. Strong northerly flow and gusts up to 35-40 mph enhance mixing that limits radiational cooling, while the incoming drier air mass from higher latitudes supports the 50-56°F range favored by several National Weather Service and GFS runs. Historical October climatology for Dallas places average lows around 57°F, but the rapid transition this week introduces uncertainty in boundary-layer cooling rates and exact minimum timing, keeping probabilities for both 68°F-plus and sub-50°F outcomes near even ahead of final observational data.