Persistent subtropical high pressure and residual warm, humid air masses following Typhoon Dolphin kept overnight minimum temperatures elevated across Hong Kong on August 10, 2026. Hong Kong Observatory data and numerical model consensus indicated limited radiative cooling under mostly cloudy conditions, with thundery showers providing insufficient relief to drop the official headquarters station minimum below 30°C. This strong observational and forecast alignment produced the market’s near-certain consensus on a 30°C low. A realistic challenge would have required substantially heavier nocturnal precipitation or an unexpected cold-air intrusion capable of lowering the measured minimum to 29°C or below at the reference station.