ECMWF and GFS ensemble means firmly indicate dominant high-pressure ridge amplification over southern China by April 27, driving substantial warm advection. Surface temperature projections consistently show Guangzhou hitting 30-32°C. The 850 hPa thermal advection suggests ample heat supply, making the 31°C threshold highly susceptible to breach under expected clear-sky solar forcing. 80% YES — invalid if unexpected tropical cyclogenesis or strong cold frontal intrusion.
ECMWF and GFS ensemble means firmly indicate dominant high-pressure ridge amplification over southern China by April 27, driving substantial warm advection. Surface temperature projections consistently show Guangzhou hitting 30-32°C. The 850 hPa thermal advection suggests ample heat supply, making the 31°C threshold highly susceptible to breach under expected clear-sky solar forcing. 80% YES — invalid if unexpected tropical cyclogenesis or strong cold frontal intrusion.
