Recent National Weather Service guidance and ensemble model consensus indicate Miami highs on September 8 will likely reach 88–90°F amid high humidity, light easterly flow, and strong afternoon instability favoring widespread thunderstorms. These convective cells often limit peak heating by increasing cloud cover and producing brief cooling outflows, keeping maxima from exceeding the low 90s while preventing drops into the mid-80s. The narrow spread between 88–89°F and 90–91°F outcomes reflects minor uncertainties in thunderstorm timing and sea-breeze strength, both of which can shift the daily maximum by 1–2°F. Updated model runs and morning soundings in the next 48 hours will clarify whether stronger convection or clearer intervals emerge.