**NWS forecasts indicate a sharp overnight drop in Denver driven by clearing skies after morning showers, northerly winds, and radiational cooling under high pressure.** Official point forecasts from the National Weather Service Denver-Boulder office show temperatures falling from the mid-40s early on October 15 into the low 30s by late evening, with a Thursday night low near 31°F. This aligns with the market's leading 50% implied probability for 35°F or below, as model consensus favors continued cooling through the resolution window. Historical October norms around 37–51°F provide context, but the current frontal passage and dry air mass have accelerated the decline beyond typical patterns. Traders appear focused on the precise timing of the minimum and any last adjustments in evening observations.