**Cooler air mass advection behind a northwest cold front is the dominant driver behind current trader positioning on Atlanta's October 17 minimum temperature.** Official NWS and model guidance show highs falling into the mid-60s under sunny skies while clear conditions and northerly winds of 10–20 mph promote strong overnight radiational cooling, with consensus lows centered in the mid-to-upper 40s °F. This places the most probable outcome near the 44–49 °F range, where multiple overlapping bins sit at 34 % implied probability. The near-even split between the 43 °F-or-below (50 %) and 62 °F-or-higher (49 %) outcomes reflects residual uncertainty in exact minimum timing and boundary-layer mixing rather than any realistic warm-night scenario. Updated model runs and NWS forecast discussions over the next 24–48 hours will be the key catalysts likely to narrow these probabilities.