Persistent high pressure and unseasonably warm conditions across the Southeast drove Atlanta's overnight low to 72°F on September 14, aligning with the market's 97.5% implied probability for the 72-73°F bin. National Weather Service observations and model consensus showed clear skies, light easterly winds, and dew points near 70°F that prevented significant radiative cooling, keeping minimums several degrees above the 1991-2020 average of 66°F. This outcome reflected the broader late-summer heat pattern, with Atlanta already logging over 70 days above 90°F. A stronger cold front or increased cloud cover could have lowered readings into the upper 60s, but no such development occurred in the final forecast updates.