**Trader consensus reflects substantial forecast uncertainty for Busan's August 28 maximum temperature two days ahead, with models showing potential highs clustered near 28–31 °C amid mixed signals from the North Pacific high and embedded instability.** Persistent warm, humid advection supports daytime peaks near or above 30 °C, yet high moisture content and weak steering flows favor scattered thunderstorms and increased cloud cover that can suppress insolation and cap the daily maximum by 2–4 °C. Recent Korea Meteorological Administration guidance notes afternoon rain chances exceeding 60 % on the 28th, while ensemble spreads highlight sensitivity to exact timing of any seabreeze or frontal passage. Updated model runs and observational data over the next 24 hours will likely sharpen resolution around these thresholds.