Recent National Weather Service guidance for Chicago on October 11 projects an overnight low in the upper 50s under partly cloudy skies and light easterly flow, reflecting a continued warm anomaly several degrees above the 1991–2020 average low near 48°F. The near-tie between sub-50°F and 68°F+ market outcomes stems from residual spread across ensemble members regarding the exact timing of the daily minimum and potential lake-breeze moderation near the shoreline. Southerly advection earlier in the period has elevated dew points and limited radiational cooling, while any shift in cloud cover or wind direction could alter the realized low by several degrees. Updated model runs and 00Z observations over the next 48 hours will narrow the range ahead of resolution.