ECMWF and GFS ensemble outputs for Shanghai on May 10 firmly indicate nocturnal minimums tracking consistently above the 20°C threshold. The persistent subtropical ridge maintaining dominant influence across the East China Sea precludes significant cold advection. Elevated boundary layer dew points and urban heat island effects will limit radiative cooling, pushing the nocturnal minima above the threshold. Current thermal profiles support this robustly. 90% YES — invalid if an unanticipated frontal intrusion drastically alters airmass characteristics.
ECMWF and GFS ensemble outputs for Shanghai on May 10 firmly indicate nocturnal minimums tracking consistently above the 20°C threshold. The persistent subtropical ridge maintaining dominant influence across the East China Sea precludes significant cold advection. Elevated boundary layer dew points and urban heat island effects will limit radiative cooling, pushing the nocturnal minima above the threshold. Current thermal profiles support this robustly. 90% YES — invalid if an unanticipated frontal intrusion drastically alters airmass characteristics.
