Shanghai's climatological mean high for early May consistently hovers near 25°C. Current GFS and ECMWF ensembles strongly indicate a robust warm advection pattern developing, with a persistent subtropical ridge axis positioning favorably. This setup will drive southerly flow and enhance diurnal heating. The 22°C threshold is significantly below the typical variance for this period. 95% YES — invalid if a strong polar airmass penetration occurs on May 5th.
Shanghai's climatological mean high for early May consistently hovers near 25°C. Current GFS and ECMWF ensembles strongly indicate a robust warm advection pattern developing, with a persistent subtropical ridge axis positioning favorably. This setup will drive southerly flow and enhance diurnal heating. The 22°C threshold is significantly below the typical variance for this period. 95% YES — invalid if a strong polar airmass penetration occurs on May 5th.
