Forecasts from the National Weather Service and other models indicate a partly sunny Thursday with a 40-60% chance of showers and thunderstorms developing after midday, which introduces the main uncertainty for Atlanta’s daily maximum. These convective clouds and any early outflow can limit afternoon insolation and cause temperatures to fall into the lower 80s, keeping the high near 88–90 °F. Light southerly flow and dew points in the low-to-mid 70s support heat indices near 95–100 °F if skies remain clearer longer, but model consensus favors enough coverage to cap the peak. This spread explains the tight clustering of market-implied odds around the 86–89 °F bins versus the lower probability assigned to 90 °F or above. Updated model runs and afternoon observations tomorrow will determine whether the realized high lands in the upper or lower half of that range.